Thursday, September 19, 2024, 22:44

Cartridge #21 loaded with 211 discs including 3 analysis discs

To be reduced inside a Ta container tube.  Tube wrapped in 3 Ta foil heatshields.

Reduction for 4 hours and then 8 hours @ 450A

Good Vacuum: 5.0e-04 Torr

Bad Vacuum: 5.0e-02 Torr

Initial pressure is 1.6 e-06 Torr

Friday, September 20, 2024, 08:47

ramped to 300 A and allowed pressure to drop. Pressure stable around 5.0 e-5 Torr.  Will continue ramp at 2A/min

Friday, September 20, 2024, 12:30

At 500A the pressure stops rising.  Will leave for 4 hours. 

Tuesday, September 24, 2024, 15:46

reduced for 4 hours then ramped down to 450A at -2A/min

After 8 hours ramped down to zero A at -2A/min

Tuesday, January 14, 2025, 16:26

Cartridge #22 loaded with 211 discs including 3 analysis discs

To be reduced inside a Ta container tube.  Tube wrapped in 3 Ta foil heatshields.

Reduction for 4 hours and then 8 hours @ 450A (see docushare 177267)

Good Vacuum: 5.0e-04 Torr

Bad Vacuum: 5.0e-02 Torr

Initial pressure is 1.6 e-06 Torr

Tuesday, January 14, 2025, 16:27

Left system to pump down earlier in the day. 

Wednesday, January 15, 2025, 10:23

Earlier started initial ramp to 60A at 2A/min

Initial pressure IGP1 was 2.65e-06 Torr

Pressure stable now at 2.40e-5 Torr

Starting ramp to 90 A at 1A/min

Thursday, September 29, 2011, 10:54

UO2/C mixture was made on Tuesday Sept 27, casted on a piece of glass and let dried in the fume hood for ~2days. 

Dried UO2/C mass = 61.72g

Target material is wrapped /w graphite sheet and put on a new heatboat coated/sintered /w TaC.

Heat boat is wrapped with 3-Ta heat shields. 

Evaporator chamber is currently being pumped down. 

Friday, September 30, 2011, 10:01

Evaporator has been pumped down over night, IG currently @ 2.92e-6 Torr, BP @ 27mT.

TGHT will be stepped up to 40A and allow the pressure to slowly increase.  

Friday, September 30, 2011, 10:30  

TGHT is holding at 40A/0.139V  (local @ 37A), and pressure is slowly increasing, expect pressure to stabilize at ~4.5e-5 Torr before being auto-heating.

See attachment#1: TGHT_40A. 

Friday, September 30, 2011, 13:39

TGHT has been at 40A for more than 3 hrs.  Pressure went as high as 6.9e-5 Torr and it's now coming down.  (See attachment#2:  TGHT@40A_3hrs)

Auto-heating is initiating.  TGHT rate @ 0.1A/min to reach to max current of 525A.  (see attachment#3: parameter.jpg) 

Sunday, October 09, 2011, 10:44  

Target heater reached to 520A and held for a few hours.  

Evaporator was cooled down last night and TGHT is now at 0A.

(For the overall process, see Attachment#4: UCx#3_batch1.jpg) 

IG1 @ 5.7e-7 Torr.  Chamber will be vented with Ar on Tuesday. 

TGHT is off and water valve is shut.  

 Tuesday, October 11, 2011, 13:10

Evaporator glovebox was purged with Ar prior to venting the chamber with Ar.  

Layers of burnout marks were coated all around the inside of the evaporator (see attachment#5. Evpr_afterprocess.jpg), 

Before cleaning, the evaporator chamber had ~200,000 cpm. 

The heating boat containing UCx was removed from the evaporator and stored in the "orange" case, then transferred to the Ar-glove box.

Weight of UCx flasks:  47.15g (See attachment#6: UCx#3_batch1_mass.jpg)

The evaporator was thoroughly cleaned; the burnout marks were removed, and it will be used for UCx#3:batch#2 - UO2/C process.

 Thursday, October 06, 2011, 12:19

UO2/C mixture was made on Oct 4 and casted on a piece of glass costed with WD40, and let dried in the fume hood for 2days. 

Dried UO2/C mass = 64.95g

The batch is wrapped with a piece of graphite sheet and waiting to be heated in the evaporator.  

Currently, batch#1 is in the evaporator.

 Wednesday, October 12, 2011, 10:52

UO2/C mixture was loaded on a heatboat and wrapped with 3-Ta heat shields. 

Evaporator has been pumped down overnight, IG currently at 1.57e-6 Torr.

TGHT will be stepped up to 40A. 

Wednesday, October 12, 2011, 11:00  

TGHT @ 40A/0.128V, local @ 37A. IG @ 1.7e-6 Torr.  

Wednesday, October 12, 2011, 12:35 

TGHT tripped off @ 40A due to high vacuum (>8E-5 Torr).  See attachment#1

Vacuum has come down to 8.5e-6 Torr. 

Stepped up TGHT to 35A.

Wednesday, October 12, 2011, 15:19  

TGHT was held at 35A for 2.5 hrs.  IG @ 4.5e-5 Torr.

Initiated auto heating @ 0.1A/min, Max current @ 525A. 

 Thursday, October 20, 2011, 16:15

Vacuum suddenly increased to ~ 7.7e-5 Torr when TGHT @ 317A (see attachment#2).  There could be a shift in the material during the thermal reduction,

and caused a sudden spike in vacuum.

Currently, IG @ 5.2e-5 Torr, TGHT @ 316.7A.

TGHT reached to 525A and held for >4hrs before cooling down (see attachment#3)

UCx was removed from the evaporator and transferred to the Ar-glove box.  

The material looks great! 

Wednesday, June 06, 2012, 16:55

The UO2/C green was prepared on June 04, 2012. 

UO2 powder used = 50.26g

C-grv used = 10.14g. 

Dry UO2/C green mass = 61.71g.

The green was rolled and wrapped in a piece of graphite sheet.

The target boat was wrapped with 3 Ta-heat shield and installed in the Evap#1. 

The chamber is currently being pumped down.

 Tuesday, June 12, 2012, 11:42

Currently, IEVAPIG1= 1.83e-6 Torr, IEVAP:CG2= 48 mTorr.

Backing line pressure is slightly high.  Will get Edi to look into this.

 Tuesday, June 12, 2012, 14:38

The backing pump oil was changed (ISAC WP#2012-06-12-1).  IEVAP:CG2 is currently reading 27mTorr and IEVAPIG1 at 1.66e-6 Torr.

 Tuesday, June 12, 2012, 16:06

TGHT was tabbed up to 50A and stayed for 1.5 hrs.  Not much change in the pressure, currently at 1.8e-6 Torr, BP @ 25mTorr.  

Keep stepping up TGHT current...

 Tuesday, June 12, 2012, 16:37

TGHT at 65A.  Pressure is starting to rise.

 Tuesday, June 12, 2012, 16:46

Pressure at  6.8e-6 Torr and going up slowly. 

Initiated TGHT auto-ramping:

Max current = 525A,  rate @ 0.1A/min (see attachment #1)

 Wednesday, June 13, 2012, 13:22

TGHT has almost reached to 80A.  Pressure is limiting at 4.5e-6 Torr. (see attachment#2)

Thursday, June 14, 2012, 17:11

TGHT has reached to 95.40A, local @ 92A & 0.48V.  Pressure is still limiting at 4e-6 Torr.  (see attachment #3)

The TGHT current can not go up above 232A because it's voltage limiting at 1.953V (see attachment#4).  The carbon thermal-reduction process stops and the vacuum is going down to low 10e-6 Torr. 

The voltage can not be increased on EPICS; it has to be adjusted locally.  

Auto-ramping aborted.  

The TGHT current setpoint was lowered down to 228A.

Sunday, June 17, 2012, 12:03  

Asked ISAC Ops (Ed Parton) to help me increase the voltage locally.  The voltage nob was turned 1/4 clockwise, and the current was tapped up from 228 to 231A, and it was responding.  The voltage nob was further turned to 3/4 clockwise. 

Initiated auto-ramping. 

Currently, TGHT setpoint at 234.90A, local 231A/1.95V.  

Vacuum is responding and it's slowly going up (currently at 2.8e-6 Torr) - The carbon thermal reduction process continues... 

Monday, June 18, 2012, 00:20  

TGHT is going up slowly, currently at  285A.  The pressure is limiting as the carbonization process is under way (see attachment 5).

 Monday, June 25, 2012, 16:00

The EPICS control was down on Sunday night. So the auto-ramping was aborted.  

Control group fixed the problem, and the network is back online.

The auto-ramping has been re-initiated. 

TGHT is currently at 314.70A, local at 311/3.04V.  IG at 4.21e-5 Torr, BP at 15mTorr.

 Saturday, June 30, 2012, 23:08

The carbonization process has finished.

TGHT has reached to 520A and maintained at that current for about 5hrs. (see attachment #6).

Initiated auto-cool down.

Tuesday, July 03, 2012, 13:05 

TGHT is now at 0A.  The carbonization process is done.  

It took over 20 days for this process (see attachment #7), due to some control issues & power supply problem. Also the vacuum limit was set to 4.0e-5 Torrr; that might increase the pumping time.  

Next time, try setting the pressure limit to 5.0e-5 Torr.  

The chamber will be vented with Ar, and the UC2 flakes will be transferred to the Ar-glove box.  

John Wong wrote:

Wednesday, June 06, 2012, 16:55 The UO2/C green was prepared on June 04, 2012.  UO2 powder used = 50.26g C-grv used = 10.14g.  Dry UO2/C green mass = 61.71g. The green was rolled and wrapped in a piece of graphite sheet. The target boat was wrapped with 3 Ta-heat shield and installed in the Evap#1.  The chamber is currently being pumped down.

 Monday, June 11, 2012, 10:31

Last week during the pump down of the chamber (vacuum got down to low 10e-5 Torr), the cooling was open in preparation of turning on the target heater.  A vacuum excursion was triggered (pressure went up to 300mTorr), and the system was tripped off.  It was suspected that there was some leaks. 

A leak test was performed - all the water connecters & joints are fine.  The seal for the chamber lid was found leaky (5e-8 atm cc/sec).  The seal was replaced and the vacuum was improved but no perfect.

The chamber has been pumped down over the weekend, pressure currently at 2.3e-6 Torr. 

Coincidentally, the TGHT power supply is broken.  The initial action was to turn on the power supply at 0A when the chamber vacuum had gone down to 10-6 Torr.  But the power supply did not regular and shot up to 1000A and caused a vacuum excursion.  Ray Dube will replaced it. 

John Wong wrote:

John Wong wrote: Wednesday, June 06, 2012, 16:55 The UO2/C green was prepared on June 04, 2012.  UO2 powder used = 50.26g C-grv used = 10.14g.  Dry UO2/C green mass = 61.71g. The green was rolled and wrapped in a piece of graphite sheet. The target boat was wrapped with 3 Ta-heat shield and installed in the Evap#1.  The chamber is currently being pumped down.    Monday, June 11, 2012, 10:31 Last week during the pump down of the chamber (vacuum got down to low 10e-5 Torr), the cooling was open in preparation of turning on the target heater.  A vacuum excursion was triggered (pressure went up to 300mTorr), and the system was tripped off.  It was suspected that there was some leaks.  A leak test was performed - all the water connecters & joints are fine.  The seal for the chamber lid was found leaky (5e-8 atm cc/sec).  The seal was replaced and the vacuum was improved but no perfect. The chamber has been pumped down over the weekend, pressure currently at 2.3e-6 Torr.  Coincidentally, the TGHT power supply is broken.  The initial action was to turn on the power supply at 0A when the chamber vacuum had gone down to 10-6 Torr.  But the power supply did not regular and shot up to 1000A and caused a vacuum excursion.  Ray Dube will replaced it.

 Tuesday, June 12, 2012, 11:37

Ray Dube repaired the TGHT power supply.  It is now operational.

John Wong wrote:

Wednesday, June 06, 2012, 16:55 The UO2/C green was prepared on June 04, 2012.  UO2 powder used = 50.26g C-grv used = 10.14g.  Dry UO2/C green mass = 61.71g. The green was rolled and wrapped in a piece of graphite sheet. The target boat was wrapped with 3 Ta-heat shield and installed in the Evap#1.  The chamber is currently being pumped down.  Tuesday, June 12, 2012, 11:42 Currently, IEVAPIG1= 1.83e-6 Torr, IEVAP:CG2= 48 mTorr. Backing line pressure is slightly high.  Will get Edi to look into this.  Tuesday, June 12, 2012, 14:38 The backing pump oil was changed (ISAC WP#2012-06-12-1).  IEVAP:CG2 is currently reading 27mTorr and IEVAPIG1 at 1.66e-6 Torr.  Tuesday, June 12, 2012, 16:06 TGHT was tabbed up to 50A and stayed for 1.5 hrs.  Not much change in the pressure, currently at 1.8e-6 Torr, BP @ 25mTorr.   Keep stepping up TGHT current...  Tuesday, June 12, 2012, 16:37 TGHT at 65A.  Pressure is starting to rise.  Tuesday, June 12, 2012, 16:46 Pressure at  6.8e-6 Torr and going up slowly.  Initiated TGHT auto-ramping: Max current = 525A,  rate @ 0.1A/min (see attachment #1)  Wednesday, June 13, 2012, 13:22 TGHT has almost reached to 80A.  Pressure is limiting at 4.5e-6 Torr. (see attachment#2) Thursday, June 14, 2012, 17:11 TGHT has reached to 95.40A, local @ 92A & 0.48V.  Pressure is still limiting at 4e-6 Torr.  (see attachment #3) The TGHT current can not go up above 232A because it's voltage limiting at 1.953V (see attachment#4).  The carbon thermal-reduction process stops and the vacuum is going down to low 10e-6 Torr.  The voltage can not be increased on EPICS; it has to be adjusted locally.   Auto-ramping aborted.   The TGHT current setpoint was lowered down to 228A. Sunday, June 17, 2012, 12:03   Asked ISAC Ops (Ed Parton) to help me increase the voltage locally.  The voltage nob was turned 1/4 clockwise, and the current was tapped up from 228 to 231A, and it was responding.  The voltage nob was further turned to 3/4 clockwise.  Initiated auto-ramping.  Currently, TGHT setpoint at 234.90A, local 231A/1.95V.   Vacuum is responding and it's slowly going up (currently at 2.8e-6 Torr) - The carbon thermal reduction process continues...  Monday, June 18, 2012, 00:20   TGHT is going up slowly, currently at  285A.  The pressure is limiting as the carbonization process is under way (see attachment 5).

Sunday, June 24, 2012, 22:51  

The Evaporator IOC has lost communication (see attachment #6).  The TGHT auto ramping was not responding to the vacuum limit and kept ramping up, so the program had to be aborted.  

On the live camera,  it showed that TGHT stopped at 311A/3.02V and the pressure was at 5.05e-5 Torr.  

An email has sent to Controls and hopefully things get resolved on Monday. 

John Wong wrote:

John Wong wrote: Wednesday, June 06, 2012, 16:55 The UO2/C green was prepared on June 04, 2012.  UO2 powder used = 50.26g C-grv used = 10.14g.  Dry UO2/C green mass = 61.71g. The green was rolled and wrapped in a piece of graphite sheet. The target boat was wrapped with 3 Ta-heat shield and installed in the Evap#1.  The chamber is currently being pumped down.  Tuesday, June 12, 2012, 11:42 Currently, IEVAPIG1= 1.83e-6 Torr, IEVAP:CG2= 48 mTorr. Backing line pressure is slightly high.  Will get Edi to look into this.  Tuesday, June 12, 2012, 14:38 The backing pump oil was changed (ISAC WP#2012-06-12-1).  IEVAP:CG2 is currently reading 27mTorr and IEVAPIG1 at 1.66e-6 Torr.  Tuesday, June 12, 2012, 16:06 TGHT was tabbed up to 50A and stayed for 1.5 hrs.  Not much change in the pressure, currently at 1.8e-6 Torr, BP @ 25mTorr.   Keep stepping up TGHT current...  Tuesday, June 12, 2012, 16:37 TGHT at 65A.  Pressure is starting to rise.  Tuesday, June 12, 2012, 16:46 Pressure at  6.8e-6 Torr and going up slowly.  Initiated TGHT auto-ramping: Max current = 525A,  rate @ 0.1A/min (see attachment #1)  Wednesday, June 13, 2012, 13:22 TGHT has almost reached to 80A.  Pressure is limiting at 4.5e-6 Torr. (see attachment#2) Thursday, June 14, 2012, 17:11 TGHT has reached to 95.40A, local @ 92A & 0.48V.  Pressure is still limiting at 4e-6 Torr.  (see attachment #3) The TGHT current can not go up above 232A because it's voltage limiting at 1.953V (see attachment#4).  The carbon thermal-reduction process stops and the vacuum is going down to low 10e-6 Torr.  The voltage can not be increased on EPICS; it has to be adjusted locally.   Auto-ramping aborted.   The TGHT current setpoint was lowered down to 228A. Sunday, June 17, 2012, 12:03   Asked ISAC Ops (Ed Parton) to help me increase the voltage locally.  The voltage nob was turned 1/4 clockwise, and the current was tapped up from 228 to 231A, and it was responding.  The voltage nob was further turned to 3/4 clockwise.  Initiated auto-ramping.  Currently, TGHT setpoint at 234.90A, local 231A/1.95V.   Vacuum is responding and it's slowly going up (currently at 2.8e-6 Torr) - The carbon thermal reduction process continues...  Monday, June 18, 2012, 00:20   TGHT is going up slowly, currently at  285A.  The pressure is limiting as the carbonization process is under way (see attachment 5).   Sunday, June 24, 2012, 22:51     The Evaporator IOC has lost communication (see attachment #6).  The TGHT auto ramping was not responding to the vacuum limit and kept ramping up, so the program had to be aborted.   On the live camera,  it showed that TGHT stopped at 311A/3.02V and the pressure was at 5.05e-5 Torr.   An email has sent to Controls and hopefully things get resolved on Monday.

 Monday, June 25, 2012, 15:57

The Control Support group investigated the problem and found out that the fiber converters on both ends failed.  They have been replaced with brand new switches with fiber connections.

 The Evap EPICS is back online. 

Before began the carbonization process, two cameras were setup in the hotlab for monitoring the evaporator and the power supply.  On duty ISAC Ops also helps to monitor on a regular basis and to grab the striptools + cameras (twice/shift) and put this information in the ISAC Logbook with subject header:  "UCx_2011_A 'date time'", for easy search.  

Wed May 25 14:39:31 2011:  UO2/C cast was dried in the fumehood over the weekend.  The cast was pilled off from the coated WD40 glass plate, rolled up and put in a target heating boat (/w TaC coating & sintered).   The boat was wrapped with 3 Ta-heat shields, then installed in the evaporator which is currently being pumped down.

Thu May 26 11:40:06 2011:  Vac @ 1.75e-6 torr, BP @ 0.032T.  TGHT stepped up to 30A/0.092V (panel @ 27A), ; TGHT has been held for over 10 mins, no change in vacuum yet.

Thu May 26 11:46:48 2011: TGHT @ 40A/0.123V (panel @ 37A), Vac 2.3e-6 Torr, BP@0.032T. 

Thu May 26 15:13:19 2011:  TGHT has been at 40A/0.123V for sometime.  Currently, Vac @ 4.39e-5 Torr, BP@ 0.27T.  (See Attachement#1)

Thu May 26 17:28:36 2011:  Auto ramping has begun.  (see attachment#2).  TGHT @ 40.60A, (panel @ 38A), vac @ 3.84 e-5 Torr.  

Wed Jun 1 13:28:58 2011:  TGHT currently at 395A/3.16V, vac @ 4.47e-5 Torr.  Heating sequence changed for the increment from 4.5e-5 Torr to 5.0e-5 Torr. 

Fri Jun 3 09:54:28 2011 :  The organics burnoff and the carbonization process are complete (see Attachment#3 for the striptool).  The cooling process will begin at a rate of 2A/min.  

Tue Jun 14 21:24:41 2011 :  The evaporator was about to be vented by argon on Jun 10 (Fri), but it was found that the argon cylinder was almost empty; a new one was replaced (see Attachment #4: Evaporator_Ar_flow).  After the argon cylinder was replaced,  the evaporator was purged with the gas and the vent valve was connected to the cylinder for venting of the evaporator.  The target oven was removed and stored in the hermetic transfer vessel, then transferred to the glove box.  (See attachment #5: UC2, Note: typo. Should read Ar gas, NOT N2).  The flakes were stored in the jar labelled "Stock# 2011_A", with total weight of 35g. 

Before began the carbonization process, two cameras were setup in the hotlab for monitoring the evaporator and the power supply.  On duty ISAC Ops also helps to monitor on a regular basis and to grab the striptools + cameras (twice/shift) and put this information in the ISAC Logbook with subject header:  "UCx_2011_B 'date time'", for easy search.  

P/S camera: http://isaccamera1, user/pw = admin

Evaporator camera: http://isac-cam01, user =admin, pw=yield 

Thu Jun 30 12:24:31 2011

UO2 used = 50.29g 

Green UO2/C = 71.96g, rolled up /w graphite sheet (15cm x 12cm), and put in the target boat, then wrapped with 3 Ta-heat shields.  The target is installed in the evaporator and is being pumped down.

Thu Jun 30 12:45:39 2011: Currently Vac @ 3.75e-5, CG2 @ 0.045T.

Friday, July 01, 2011, 13:28:  Vac @ 2.2-6 Torr.  TGHT set at 10A yesterday.   

Friday, July 01, 2011, 13:42:  TGHT stepped up to 36A (panel 33A), 0.134V.  No change in vacuum,  2.38e-6 Torr, CG @33mT. 

Friday, July 01, 2011, 13:51:  TGHT stepped up to 50A (panel 47A), 0.194V.  Vac @ 5.7e-6 Torr, CG2 @ 33mT.  

Friday, July 01, 2011, 14:09 :  Vac was rising slowly.  TGHT stepped up to 57A and the pressure started to increase faster.  TGHT was brought back down to 30A, and vac is coming down gradually.  (See attachment 1#2: Startup Vac/Current)

Friday, July 01, 2011, 14:16 :  Auto ramping began.  0.1/min, max currently @ 525A. (see attachement #3: Parameter)

Monday, July 04, 2011, 12:33:  TGTH @ 146.20A, Vac @ 4.74e-5 Torr.  (see attachment#4: 3-day trend).  Increase auto ramping rate to 0.5/min. 

Monday, July 04, 2011, 13:01:   TGHT @ 148A, Vac @ 5.20e-5 torr.  Auto rampiing paused until vacuum goes down to 5.0e-5 torr.  (see attachment#4)

Monday, July 04, 2011, 17:34:  TGHT @ 220A, VAC started to come down, indicating the burning off organics was done.  Increased heating rate to 1A/min. 

Friday, July 08, 2011, 21:30:  As per Peter Kunz, "I started the target cooldown sequence for IEVAP:TGHT1 at 20:35. The pressure came down to 4e-6 torr. The ramp down rate is 2A/min. Please check if the target heater current comes down to 0A. Then it can cool off over the weekend."

Monday, July 11, 2011, 12:17:  Evap glove box flashed with Ar gas, set pressure ~100psi.  Chamber also vented with Ar, set pressure  @ ~5psi.

Thursday, July 19, 2012, 17:09

UO2/C green was prepared on June 13, 2012. 

UO2 powder used = 50.32g (Inventory R-00835A UO2 + bottle = 946.48g left)

Graphite powder used = 10.00g

The green was rolled and wrapped in a piece of graphite sheet.

The target boat was wrapped with 3 Ta-heat shield and installed in the Evap#1. 

The chamber is currently being pumped down.

 Friday, July 20, 2012, 09:50

IG1 currently at 6.2e-6 Torr, BP @ 31mTorr. 

The target will be ramped up to 520A at 0.1A/min. 

Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.

TGHT tabbed up to 50A.  Not much of change in the vacuum.

Initiated autoramping..

Friday, July 20, 2012, 10:18  

TGHT tripped up at 51A due to high vacuum.  

Lowered TGHT to 30A and begin auto ramping.  Pressure is holding at 7e-5 Torr. 

 Wednesday, July 25, 2012, 11:57

TGHT has reached to 100A, and the vacuum is starting to come down from the high limit, 5e-5 Torr. (see attachment#1).  

The organic burn-off is almost to complete and the carbonization process will begin soon. 

Tuesday, August 07, 2012, 12:18

The carbonization process is completed.  The target heater reached to 520A (local 515A,5.17V), vacuum at 4.0 e-6 Torr. (see attachment #2)

Cooling down is in process at 2A/min.

 Tuesday, August 07, 2012, 17:44

TGHT has reached to 0A.  IG currently @ 1.3e-6 Torr, BP @ 34mTorr. 

The chamber will be vented with Ar gas tomorrow and the UC2 flakes will be transfer to the Ar-glove box.

Tuesday, April 02, 2013, 17:25

UO2/C green was prepared on Mar 11, 2013.

UO2 powder used = 50.32g (Inventory R-00835A UO2 + bottle = 896.16

Graphite powder used = 10.00g

The green was rolled and wrapped in a piece of graphite sheet

The target boat was wrapped with 3 -Ta heat shields and installed in the Evap#1.

The chamber is currently being pumped down.

The target will be ramped up to 520A at the rate of 0.1A/min. 

Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.

 Wednesday, April 03, 2013, 11:28

IG1 currently at 3.56e-6 Torr, BP at 28mTorr.

Tabbing up TGHT to 50A.

After 20 mins, IG got up to 7.5e-5 torr (tripping at 8e-5 Torr).  Lower TGHT to 20A. 

Initiated autoramping...

 Monday, April 15, 2013, 14:33

The domestic water will be shut off tomorrow, April 16 at 07:00 for ARIEL work.  The evaporator cooling water will be shut off; therefore the process must stop for now.

TGHT is current at 315.5A, IG1 at 5.2e-5 Torr. 

Cooling down at 1A/min.

 Tuesday, April 16, 2013, 16:28

The cooling water is back online.  The carbonization process will continue...

TGHT will be ramped up to 300A at 2A/min.  Then the ramping rate will changed to 0.1A/min to have TGHT reach to 520A.

IG is currently at 1.2e-6 Torr.

 Wednesday, April 17, 2013, 10:53

TGHT continues to ramp at 0.1A/min.

 Sunday, April 21, 2013, 22:11

The synthesis of UC2 is complete. 

Auto cooling is initiated.  Ramping down at 1A/min.

The chamber will be vented with Ar tomorrow.

Monday, May 06, 2013, 14:29

UO2/C green was prepared on May 2, 2013 and let dry over the weekend.

UO2 powder used = 50.36g   (Inventory R-00835A UO2 + bottle = 896.30)

Graphite powder used = 10g

The green was rolled up and wrapped in a piece of graphite sheet.

The Ta-target boat was wrapped with 3-Ta heat shields and installed in the Evap#1

The chamber is currently being down down.

The target will be ramped up to 520A at the rate of 0.1A/min.

Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.

 Tuesday, May 07, 2013, 11:12

Currently, IG @ 5.6e-6 Torr; BP @ 25mTorr.  Vacuum spikes intermittently...

Stepping up TGHT to 50A.  After about 15 min, vacuum climbed up to 5.5e-5 Torr. 

Lowered TGHT to 25A, and continue heating at that current...

 Tuesday, May 07, 2013, 12:18

Vacuum is coming down to 2.6e-5 Torr.

Auto-heating initiated...

 Friday, May 24, 2013, 14:19

The carbonization process has come the end.

TGHT has reached to 520A for ~14hrs. 

IG1 @ 6.34e-6 Torr, BP @ 25mTorr.

Autocooling is initiated; ramping rate @ 1A/min.

The chamber will be remained under vacuum, and will be vented in Ar next week.

 Monday, May 27, 2013, 14:11

The chamber was vented with Ar. 

UC2 was transfered to the Ar glovebox. 

Evap#1 is off.

 Wednesday, May 29, 2013, 17:14

See attachment#1 for TGHT vs IG1 data retrieval.

 Tuesday, June 25, 2013, 14:35

UO2/C green was prepared on June 18, 2013 and let dry over the weekend.

UO2 powder used = 50.25g (Inventory R-00835A UO2 + bottle = 845.94g - before use)

Graphite powder used = 10.0g

The green was rolled up and wrapped in a piece of graphite sheet.

The Ta-target boat was wrapped with a 3-Ta heat shields and installed in the Evap#1 on June 24, 2013

The chamber has been pumped down

IG1 currently at 4.6E-06 torr

Target will be ramped up to 520A at the rate of 0.1A/min

Vacuum limit stop at 5.0E-05 torr, backing off at 6.0E-05 torr

Laura Lambert wrote:

Tuesday, June 25, 2013, 14:35 UO2/C green was prepared on June 18, 2013 and let dry over the weekend. UO2 powder used = 50.25g (Inventory R-00835A UO2 + bottle = 845.94g - before use) Graphite powder used = 10.0g The green was rolled up and wrapped in a piece of graphite sheet. The Ta-target boat was wrapped with a 3-Ta heat shields and installed in the Evap#1 on June 24, 2013 The chamber has been pumped down IG1 currently at 4.6E-06 torr     Target will be ramped up to 520A at the rate of 0.1A/min Vacuum limit stop at 5.0E-05 torr, backing off at 6.0E-05 torr

 Tuesday, June 25, 2013, 16:26

TGHT was stepped up to 30A for about 1hr and lowered to 20A before the pressure went up t0 ~ 1.5e-5 Torr.

Auto ramping initiated...

1. stage - burning off organics complete

2. stage - carbonization began 1-8 am 2013/07/02

Peter Kunz wrote:

1. stage - burning off organics complete 2. stage - carbonization began 1-8 am 2013/07/02

 Thursday, July 11, 2013, 16:11

EPICS was down and wiped out all the strip tools, but Evap stayed on.  Data archivers showed the system was down at around mid-night on July 10 - no data was archived for 12 hours. 

TGHT has stayed at 520A (max) for at least 4 hours since I started the Evap EPICS back.

Vacuum is currently at 7.7e-6 Torr. 

The carbonization process is complete.

Auto-cool down in process - at 1A/min.

John Wong wrote:

Peter Kunz wrote:   1. stage - burning off organics complete 2. stage - carbonization began 1-8 am 2013/07/02  Thursday, July 11, 2013, 16:11 EPICS was down and wiped out all the strip tools, but Evap stayed on.  Data archivers showed the system was down at around mid-night on July 10 - no data was archived for 12 hours.  TGHT has stayed at 520A (max) for at least 4 hours since I started the Evap EPICS back. Vacuum is currently at 7.7e-6 Torr.  The carbonization process is complete. Auto-cool down in process - at 1A/min.

 Monday, July 15, 2013, 09:43

The TGHT reached to zero on Friday and the chamber has been left under vacuum over the weekend, currently at 1.3e-6 Torr.

The chamber will be vented in Ar and the UC2 flakes will be transported into the Ar-glove box.

The process is complete

Monday, May 14, 2012, 15:04

Due to the differences in the use of the graphite foils in past SiC targets (C-grv foil from Alpha Aesar) and the newly prepared SiC#27 (C-grv foil from Ceramaterial), the out-gassing period for SiC#27 took over 6 days compared to 3 days for the vacuum to come down (see https://elog.triumf.ca/TIS/Evaporator_1/47). 

A few pieces of the new graphite foil is loaded on the target boat to test the out gassing reaction. 

The Evap #1 chamber has been pumped down to low 10e-5. 

Set to same parameter, see attachment#1

Initiated auto heating...

 Tuesday, May 15, 2012, 14:46

The target heater was ramped up to 820A.  There was so much out gassing as the temperature was increased.  The voltage did not hold at that current and the target heater was tripped off after the midnight.  (see attachment #2)

After the chamber was vented, it was discovered that the target boat's legs were bent due to over heating.  Both end of the targets where they touched the base got vaporized.  The boat was also got squeezed.  (see attachment #3).  

However, the heated graphite foils (~1600C at 820A) looks pretty good.  As per the supplier, CeraMaterials, the graphite was treated to 2000C.  See attachment #4 for the certificate.

Thursday, August 22, 2013, 17:31

1st attempt:

UO2/C green was prepared on Aug 14, 2013 (wed).  The slurry was cast on a piece of glass coated with WD40.

The cast was let dry until Aug 26 (Mon) - couldn't peel off from the glass. 

2nd attempt:

So, scrapped off cast, mixed with 30ml H20 in the WC jar, re-milled for 3 hrs, and cast/let dry over night  - SAME SHIT! couldn't peel off!  Don't understand why?!

3rd attempt:

scrapped off, added the additional compositions:

1g PEG400,1g Glycerol, 10g 7% PVA, 2ml n-butanol, 2ml methonal, 20ml DI H2O.

Re-milled for 3 hours, cast and let dry!  Wahlaa... it works! (See attachment#1: pretty uranium pancake!)

However... During this process, some lost of uranium was resulted.  The slurry was more viscous than normal.  Some material was stuck to the WC jar wall and the balls.

Initial UO2 powder used = 50.14g (Inventory R-00835A UO2 + bottle = 795.56 before use)

Graphite powder used = 10g.

1st attempt dried UO2/C + organic  mass = 55.75g

2nd attempt = didn't measure

3rd attempt + additional org mass = 44.5g  (expecting to loss more uranium from the scraping/sticking to jar/balls)

The green was rolled up and wrapped in a piece of graphite sheet.

The Ta-target boat was wrapped with 3-Ta layers of heat shield and installed in Evap1 on Aug 22, 2013.

Chamber is currently being pumped down. IG1 @ 2.4e-4 Torr.

Target will be ramped up to 520A at the rate of 0.1A/min

Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr

 Monday, August 26, 2013, 11:28

Chamber has been pumped down over the weekend.  IG currently @ 5.2e-6 Torr, BP @ 38mTorr.

Stepped up TGHT to 30A/0.151V. 

 Monday, August 26, 2013, 12:28

TGHT has been at 30A for almost 50 min.  Pressure has gone up but stabled at ~ 3.7e-5 Torr.

Initiated auto-ramping...

 Monday, September 09, 2013, 15:35

The carbonization process has come to an end. 

TGHT is at 520A for almost a day; IG currently at 1.3e-5 Torr (coming down), see attachment #2.

Auto cooling initiated at 2A/min.

The chamber will be vented with Ar.

John Wong wrote:

Thursday, August 22, 2013, 17:31 1st attempt: UO2/C green was prepared on Aug 14, 2013 (wed).  The slurry was cast on a piece of glass coated with WD40. The cast was let dry until Aug 26 (Mon) - couldn't peel off from the glass.  2nd attempt: So, scrapped off cast, mixed with 30ml H20 in the WC jar, re-milled for 3 hrs, and cast/let dry over night  - SAME SHIT! couldn't peel off!  Don't understand why?! 3rd attempt: scrapped off, added the additional compositions: 1g PEG400,1g Glycerol, 10g 7% PVA, 2ml n-butanol, 2ml methonal, 20ml DI H2O. Re-milled for 3 hours, cast and let dry!  Wahlaa... it works! (See attachment#1: pretty uranium pancake!) However... During this process, some lost of uranium was resulted.  The slurry was more viscous than normal.  Some material was stuck to the WC jar wall and the balls. Initial UO2 powder used = 50.14g (Inventory R-00835A UO2 + bottle = 795.56 before use) Graphite powder used = 10g. 1st attempt dried UO2/C + organic  mass = 55.75g 2nd attempt = didn't measure 3rd attempt + additional org mass = 44.5g  (expecting to loss more uranium from the scraping/sticking to jar/balls) The green was rolled up and wrapped in a piece of graphite sheet. The Ta-target boat was wrapped with 3-Ta layers of heat shield and installed in Evap1 on Aug 22, 2013. Chamber is currently being pumped down. IG1 @ 2.4e-4 Torr. Target will be ramped up to 520A at the rate of 0.1A/min Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr

 Friday, August 23, 2013, 15:08

The chamber wasn't pumping down well; there was a problem with the seal on the lid.

Rick M. replaced it. 

The chamber is currently being pumped down;  it seems OK!

John Wong wrote:

John Wong wrote: Thursday, August 22, 2013, 17:31 1st attempt: UO2/C green was prepared on Aug 14, 2013 (wed).  The slurry was cast on a piece of glass coated with WD40. The cast was let dry until Aug 26 (Mon) - couldn't peel off from the glass.  2nd attempt: So, scrapped off cast, mixed with 30ml H20 in the WC jar, re-milled for 3 hrs, and cast/let dry over night  - SAME SHIT! couldn't peel off!  Don't understand why?! 3rd attempt: scrapped off, added the additional compositions: 1g PEG400,1g Glycerol, 10g 7% PVA, 2ml n-butanol, 2ml methonal, 20ml DI H2O. Re-milled for 3 hours, cast and let dry!  Wahlaa... it works! (See attachment#1: pretty uranium pancake!) However... During this process, some lost of uranium was resulted.  The slurry was more viscous than normal.  Some material was stuck to the WC jar wall and the balls. Initial UO2 powder used = 50.14g (Inventory R-00835A UO2 + bottle = 795.56 before use) Graphite powder used = 10g. 1st attempt dried UO2/C + organic  mass = 55.75g 2nd attempt = didn't measure 3rd attempt + additional org mass = 44.5g  (expecting to loss more uranium from the scraping/sticking to jar/balls) The green was rolled up and wrapped in a piece of graphite sheet. The Ta-target boat was wrapped with 3-Ta layers of heat shield and installed in Evap1 on Aug 22, 2013. Chamber is currently being pumped down. IG1 @ 2.4e-4 Torr. Target will be ramped up to 520A at the rate of 0.1A/min Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr      Friday, August 23, 2013, 15:08 The chamber wasn't pumping down well; there was a problem with the seal on the lid. Rick M. replaced it.  The chamber is currently being pumped down;  it seems OK!

 Tuesday, September 10, 2013, 12:13

The TGHT reached zero on Monday and the chamber was left under vacuum overnight at 1.3e-6 Torr.

The chamber was accidentally vented in air until ~25mTorr for ~10min, then it was quickly pumped down again for ~10min before it was vented in Ar.

The chamber was vented in Ar and the UC2 flakes were transported into the Ar-glove box.

The process is complete 

Thursday, September 19, 2013, 15:35

UO2/C green was prepared on Aug 17, 2013. The slurry was cast on a piece of glass coated with WD40.

The cast was let dry until Aug 19, 2013.

Initial UO2 powder used = 49.97g (Inventory R-00835A UO2 + bottle = 745.42 before use)

Graphite powder used = 10.12g

Green cast dried UO2/C + organic mass = 59.62g

The green was rolled up and wrapped in a piece of graphite sheet.

The Ta-target boat was wrapped with 3-Ta layers of heat shield and installed in Evap1 on Sept 19, 2013.

Chamber is currently being pumped down. IG1 @ 9.97e-12T.

Target will be ramped up to 520A at the rate of 0.1A/min

Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr

Laura Lambert wrote:

Thursday, September 19, 2013, 15:35 UO2/C green was prepared on Aug 17, 2013. The slurry was cast on a piece of glass coated with WD40. The cast was let dry until Aug 19, 2013. Initial UO2 powder used = 49.97g (Inventory R-00835A UO2 + bottle = 745.42 before use) Graphite powder used = 10.12g Green cast dried UO2/C + organic mass = 59.62g The green was rolled up and wrapped in a piece of graphite sheet. The Ta-target boat was wrapped with 3-Ta layers of heat shield and installed in Evap1 on Sept 19, 2013. Chamber is currently being pumped down. IG1 @ 9.97e-12T. Target will be ramped up to 520A at the rate of 0.1A/min Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr

 Friday, September 20, 2013, 13:48

Chamber has been pumped down overnight.  IG at 6.2e-6 Torr, BP @ 32mT.

Stepping up TGHT to 30A.

 Friday, September 20, 2013, 15:12

TGHT auto ramping initiated.  

 Monday, October 07, 2013, 14:09

TGHT has reached to 520A/5.5V.

Vac at 7.7e-6 Torr. 

The carbonization process is complete.

Auto-cooling is initiated at 2A/min, and the chamber will be vented in Ar after the target is cooled.

 Thursday, October 09, 2014, 13:36

*update* RENAME: batch #07 - 09192013 to UC2Flk_00 used for UCx#11

Tuesday, August 30, 2011, 09:29: Target Boat wrapped with 3 Ta heat shields. 6 D-End Caps and 6 End Caps coated with TaC. Pumping down - vac at 3.6e-5 torr.

Tuesday, August 30, 2011, 10:35: Stepped heater up to 100 A. Vacuum tripped heater. Stepped back up to 80 A then 70 A. Vac at 4.5e-5 torr.

Tuesday, August 30, 2011, 14:30: Manually increased heater to 580 A. Vac is 2.5e-5 torr. Local reading is 561 A for 570 A and 570 A for 580 A set points.

Tuesday, August 30, 2011, 15:57: Manually decreased heater in 12 min to 0 A from 460 A  vac starting at 6.3e-6 torr.

Anders Mjos wrote:

Tuesday, August 30, 2011, 09:29: Target Boat wrapped with 3 Ta heat shields. 6 D-End Caps and 6 End Caps coated with TaC. Pumping down - vac at 3.6e-5 torr. Tuesday, August 30, 2011, 10:35: Stepped heater up to 100 A. Vacuum tripped heater. Stepped back up to 80 A then 70 A. Vac at 4.5e-5 torr. Tuesday, August 30, 2011, 14:30: Manually increased heater to 580 A. Vac is 2.5e-5 torr. Local reading is 561 A for 570 A and 570 A for 580 A set points. Tuesday, August 30, 2011, 15:57: Manually decreased heater in 12 min to 0 A from 460 A  vac starting at 6.3e-6 torr.

 Vented evaporator. 

Monday, September 12, 2011, 13:07

Target boat is loaded with coated TaC end caps for sintering.  Target boat is wrapped with 3 Ta-heat shields. 

Max TGHT = 580A

Monday, September 12, 2011, 14:58 

Vac @ 3.72e-6 Torr.  Stepping up TGHT to 90A; pressure starting to increase.

 Monday, September 12, 2011, 15:33

Evaporator tripped twice when TGHT was at 90A and 85A.  Lowered TGHT to 75A.

Tuesday, September 13, 2011, 09:56 

TGHT was on auto-heating and reached to 580A yesterday evening.  The auto cooling began at mid-night after heated for a few hours. 

The chamber will be vented shortly.

See attachment#1: striptool.

Wednesday, June 01, 2022, 08:39

A loaded graphite cartridge was set in a tantalum boated and wrapped with 3 tantalum sheets (previous day)

IGP1 = 1.6 e-6 Torr

Good vacuum = 5e-2 Torr

Bad vacuum = 5e-1 Torr

Current ramp is 1A per 10s from 0A to 40A then continue to 80A at 1A/10s.  Then at 1A/min to 120 A and allow degas and then autoramp 1A/10s from 120A to (450-550A)

Wednesday, June 01, 2022, 09:51

IGP1= 3.0e-4 Torr

TGHT = 120A, 1.0V

Start autoramp at 1A/10s to 420A

Wednesday, June 01, 2022, 10:02

Increased ramp rate to 3A/10 s as per SOP to 440 A then will slow down the ramp to observe pressure behavior.

Wednesday, June 01, 2022, 10:19

At 430 A, autoramp set to 1A/10s to 500A as pressure was increasing. 

Will observe behavior of pressure curve then leave for 4 hours

Wednesday, June 01, 2022, 11:04

Pressure started dropping at 520A.  Stopped ramping and will leave for 4 hours.

Wednesday, June 01, 2022, 14:48

Autoramp to 400 A at 2A/30s and leave for 8 hour treatment

Wednesday, June 01, 2022, 23:00

IGP1= 2.1e-6 Torr

TGHT= 400A

Ramping down @-2A/min to 0A

Thursday, June 02, 2022, 10:09

IGP1= 6.7e-7 Torr

Ready to dismount

Tuesday, June 07, 2022, 07:05

A loaded graphite cartridge was set in a tantalum boated and wrapped with 3 tantalum sheets (previous day)

IGP1 = 1.2 e-6 Torr

Good vacuum = 5e-2 Torr

Bad vacuum = 5e-1 Torr

Current ramp is 1A per 10s from 0A to 80A at 1A/10s.  Then at 1A/min to 120 A and allow degas and then autoramp 1A/10s from 120A to (450-550A)

Tuesday, June 07, 2022, 08:28

IGP1=9.8e-5 Torr

TGHT = 120A, 0.85V

Start autoramp at 1A/10s to 420A

Tuesday, June 07, 2022, 08:45

Increased ramp rate to 3A/10 s as per SOP to 450 A then will slow down the ramp to observe pressure behavior.

Tuesday, June 07, 2022, 09:04

slowed autoramp to 2A/min to observe (1A/30s)

some erratic pressure oscillations observed then stabilized. 

Tuesday, June 07, 2022, 09:32

At TGHT = 495A pressure started dropping even while current ramping up.  Stopped ramp.  Will keep for 4 hours.

TGHT = 495.6A, 4.7V

Tuesday, June 07, 2022, 13:30

TGHT = 495.6 A, 4.7V

IGP1= 8.5 e-6 Torr

Start rampdown to 400A at 2A/30s and leave for 8 hour treatment

Thursday, October 25, 2012, 14:50

Previous sintering BeO tests, pellets 1 to 4 were done in Evaporator#2.

3 BeO pellets were made.  Each weights about 1.3g (including org mass). 

A piece of Re foil (0.002" thick) is used as the under layer to protect the reaction between Be(g) and the Ta-boat.  (see attachment#1)

Another layer of Ta-foil is used as the heat-shield to wrap around the Ta-boat.

The chamber is currently being pumped down. 

TGHT will be ramped up to 600A (~1360C) at 0.2A/min.

The pressure, voltage and current will be closely monitored. 

If the Ta-boat survives, the TGHT will continue to ramp up to max 800A (~1580C).

 Friday, October 26, 2012, 11:15

Chamber has been pumped down over night. 

IG1 @ 8.93e-6 Torr. 

Auto-ramping parameter:

Good Vac @ 2.0e-5 Torr, Bad Vac @ 3.0e-5 Torr.

rate @ 0.2A/min. 

 Tuesday, October 30, 2012, 10:57

TGHT has reached to 370A. The organic binder has burnt off. 

The pressure came down to  6.6e-6 Torr, but it is slowly going up to 8.6e-6 Torr (something is outgassing... Dissociation of BeO --> Be(g) + O(g) ?).  BP @ 39mTorr.  (see attachment#2).

 Wednesday, October 31, 2012, 12:07

TGHT has reached to 600A/6.338V for just over 6 hours.  IG is slowly coming down fro 1.2e-5 Torr.  BP @ 38mTorr. (see attachment #3)

 Wednesday, October 31, 2012, 16:49

Vacuum is coming down to 8.49e-6Torr.  TGHT has stayed at 600A/6.24V for over 11hrs.  (see attachment #4)

Auto-cooling initiated at 1A/min. 

The chamber will be vented tomorrow and the material will be inspected.

 Thursday, November 01, 2012, 10:57

TGHT has reached to 0A.  Vacuum holding at 1.9e-6Torr.

Turning off P/S and pumps prior to venting chamber.

Wednesday, January 22, 2020, 18:07

A P2N container  with no heat shields, and no graphite container was installed in the EVAP1

Chamber is currently being evacuated.

 Thursday, January 23, 2020, 09:45

Pressure IGP1=1.87e-6 Torr

Final desired current TGHT = 600 A

Manually tapped to 40 A

 The voltage looks ok, at 32 A the voltage's behavior change (see picture "voltage at 32 A") but is stable

Thursday, January 23, 2020, 13:20

Autoramp is set to 4/30s to 300 A 

The voltage and vacuum were stable so the autoramp was kept at 4/30s and the final current was set to 600 A

At 600 A the voltage was 2.4 V, the current and voltage remained stable for 1 hour (see figures 600A and 600A-zoomed)

Thursday, January 23, 2020, 15:57

The current was ramp down to 0 A  at -5A/20s 

Thursday, January 23, 2020, 16:36 

After 10 min at 0A, the current was ramp up to 600 A at 4A/30s.

At 600 A the voltage was 2.43 V (TGHT)

The container was left at 600 A overnight.

Friday, January 24, 2020, 10:51

The PN2 stayed at 600 A for 15 hrs

The voltage increased 0.1 V during the first 7hr at 600 A and then it stabilized at 2.5 V (see figure "second ramp voltage")

Friday, January 24, 2020, 10:57

The current was ramp down to 0A at -5A/20s  

Tuesday, January 28, 2020, 10:11

A P2N container  with heat shields, and without graphite container was installed in the EVAP1

Chamber is currently being evacuated.

Wednesday, January 29, 2020, 10:12

Pressure IGP1=1.87e-6 Torr

Final desired current TGHT = 600 A

Manually tapped to 40 A.

Voltage increased accordingly in an stable way.

Wednesday, January 29, 2020, 10:33 

Autoramp is set to 3/30s to 300 A 

The voltage and vacuum were stable so the autoramp was kept at 4/30s and the final current was set to 600 A

Accidentally went up to 600 A (1.98 V)!

When updating autoramp to 600 A, did not realize that procedure status was Active.

NOTE: If the procedure status is "active" the heater autoramp, does not "ramp" the current input in "final value", it will go in one step to that current.

The current was manually ramp down to 300 A

TGHT=299.52A, 0.89 V

Wednesday, January 29, 2020, 13:25

After approximately 2 hours conditions IGP1=1.6e-6Torr, TGHT =300 A, 1V.

The current ramp was started again: 4A/30s  to final value of 600 A

 Wednesday, January 29, 2020, 14:07

After 15 min, TGHT=599.424A, and 1.983 V (unstable) (see figure "P2N-test2_final voltage")

The current was ramp down to 0 A  at -5A/20s 

EVAP1 was vented with aair and the container was removed,

the copper shims and legs did not present signs of damage

the body's tantalum sheet had wrinkles inside,

the tantalum foils unfasten a bit, but were adjusted.

Wednesday, January 29 2020, 05:55  

A P2N container  with heat shields, and with a UO2/C loaded graphite container was installed in the EVAP1

Chamber is currently being evacuated.

Thursday, January 30, 2020, 08:56

Pressure limits:

Good vacuum 1e-1 Torr

Bad vacuum 5e-1 Torr

Initial pressure: 

IGP1=1.52e-6Torr

Current ramp set to 1A/min to 10 A, voltage is stable.

Current ramp increased to 1A/10s to 100 A. The pressure started raising around 80 A.

Current was kept 5min at at 100 A, voltage was stable

Thursday, January 30, 2020, 09:32 

Current ramp set to 1A/20s to 150 A (same pressure limits)

Pressure keep increasing during heating

Thursday, January 30, 2020, 09:53 

Current was kept at 150 min during 5 min, the voltage is stable, pressure started to stabilize:

IGP1 = 0.027 Torr

TGHT = 0.418 V

Ramp set to 1A/min to 200 A.

Thursday, January 30, 2020, 10:02

Pressure decreasing:

TGHT= 153 A 

Marla Cervantes wrote:

Wednesday, January 29 2020, 05:55   A P2N container  with heat shields, and with a UO2/C loaded graphite container was installed in the EVAP1 Chamber is currently being evacuated. Thursday, January 30, 2020, 08:56 Pressure limits: Good vacuum 1e-1 Torr Bad vacuum 5e-1 Torr Initial pressure:  IGP1=1.52e-6Torr Current ramp set to 1A/min to 10 A, voltage is stable. Current ramp increased to 1A/10s to 100 A. The pressure started raising around 80 A. Current was kept 5min at at 100 A, voltage was stable Thursday, January 30, 2020, 09:32  Current ramp set to 1A/20s to 150 A (same pressure limits) Pressure keep increasing during heating Thursday, January 30, 2020, 09:53  Current was kept at 150 min during 5 min, the voltage is stable, pressure started to stabilize: IGP1 = 0.027 Torr TGHT = 0.418 V Ramp set to 1A/min to 200 A. Thursday, January 30, 2020, 10:02 Pressure decreasing: TGHT= 153 A

 Thursday, January 30, 2020, 10:15

At 155 A while pressure decreasing, the power supply tripped off,

Controls has been notified, waiting for instructions.

Marla Cervantes wrote:

Marla Cervantes wrote: Wednesday, January 29 2020, 05:55   A P2N container  with heat shields, and with a UO2/C loaded graphite container was installed in the EVAP1 Chamber is currently being evacuated. Thursday, January 30, 2020, 08:56 Pressure limits: Good vacuum 1e-1 Torr Bad vacuum 5e-1 Torr Initial pressure:  IGP1=1.52e-6Torr Current ramp set to 1A/min to 10 A, voltage is stable. Current ramp increased to 1A/10s to 100 A. The pressure started raising around 80 A. Current was kept 5min at at 100 A, voltage was stable Thursday, January 30, 2020, 09:32  Current ramp set to 1A/20s to 150 A (same pressure limits) Pressure keep increasing during heating Thursday, January 30, 2020, 09:53  Current was kept at 150 min during 5 min, the voltage is stable, pressure started to stabilize: IGP1 = 0.027 Torr TGHT = 0.418 V Ramp set to 1A/min to 200 A. Thursday, January 30, 2020, 10:02 Pressure decreasing: TGHT= 153 A   Thursday, January 30, 2020, 10:15 At 155 A while pressure decreasing, the power supply tripped off, Controls has been notified, waiting for instructions.

 Thursday, January 30, 2020, 11:51

Controls respond "It looks like the power supplies were tripped by either the pirani gauge (IEVAP:IGP1) or the Nuclear vent or by both. But, it did not look like that the interlock tree latched the bad condition when the power supplies tripped. I modified the PLC to properly latch the cause of the trip." and gave green light to restart the carbothermal reduction.

Marla Cervantes wrote:

Marla Cervantes wrote: Marla Cervantes wrote: Wednesday, January 29 2020, 05:55   A P2N container  with heat shields, and with a UO2/C loaded graphite container was installed in the EVAP1 Chamber is currently being evacuated. Thursday, January 30, 2020, 08:56 Pressure limits: Good vacuum 1e-1 Torr Bad vacuum 5e-1 Torr Initial pressure:  IGP1=1.52e-6Torr Current ramp set to 1A/min to 10 A, voltage is stable. Current ramp increased to 1A/10s to 100 A. The pressure started raising around 80 A. Current was kept 5min at at 100 A, voltage was stable Thursday, January 30, 2020, 09:32  Current ramp set to 1A/20s to 150 A (same pressure limits) Pressure keep increasing during heating Thursday, January 30, 2020, 09:53  Current was kept at 150 min during 5 min, the voltage is stable, pressure started to stabilize: IGP1 = 0.027 Torr TGHT = 0.418 V Ramp set to 1A/min to 200 A. Thursday, January 30, 2020, 10:02 Pressure decreasing: TGHT= 153 A   Thursday, January 30, 2020, 10:15 At 155 A while pressure decreasing, the power supply tripped off, Controls has been notified, waiting for instructions.    Thursday, January 30, 2020, 11:51 Controls respond "It looks like the power supplies were tripped by either the pirani gauge (IEVAP:IGP1) or the Nuclear vent or by both. But, it did not look like that the interlock tree latched the bad condition when the power supplies tripped. I modified the PLC to properly latch the cause of the trip." and gave green light to restart the carbothermal reduction.

 Thursday, January 30, 2020, 13:09

IGP1=5.9e-6Torr

Ramp set to 1A/10s to 200 A

Pressure rising too fast at 200 A, current reduced manually to 190 A

Pressure start dropping and system tripped, notify to controls again, "The strip tool shows the vacuum level shoot down to 0 then shoot back up for a quick second but that is enough to tell the PLC that IGP is “bad”"

Thursday, January 30, 2020, 15:58 

Restarting process to try to trip the system on purpose 

Initial pressure IGP1 = 2.7e-6Torr

Ramp set to 1/A/10s to 200 A, 0.59 V

Ramp set to 2A/10s to 300 A

Max pressure during process IGP1 = 0.03 Torr

Voltage increased and stabilized (see voltage rising).

Ramp kept at 2A/10s to 400 A

Thursday, January 30, 2020, 16:48 

TGHT = 1.54 V, 399.744 A

IGP1 = 0.00016 Torr and going down

Ramp set to 2A/10s to 500 A

Thursday, January 30, 2020, 17:02 

TGHT= 1.9V, 499.2 A

IGP1 = 0.00014 Torr

Ramp set to 2A/10s to 600 A

Ramp set to 0.5 A/min to 700 A, ramp stopped at 680 A

Manually tapped to 697 A

Pressure dropping indicated that carbothermal reduction is done.

Unfortunately, the system did not trip. 

Contact Gelo for the  next run, such that he can monitor the system and we can spot the problem.

Marla Cervantes wrote:

Marla Cervantes wrote: Marla Cervantes wrote: Marla Cervantes wrote: Wednesday, January 29 2020, 05:55   A P2N container  with heat shields, and with a UO2/C loaded graphite container was installed in the EVAP1 Chamber is currently being evacuated. Thursday, January 30, 2020, 08:56 Pressure limits: Good vacuum 1e-1 Torr Bad vacuum 5e-1 Torr Initial pressure:  IGP1=1.52e-6Torr Current ramp set to 1A/min to 10 A, voltage is stable. Current ramp increased to 1A/10s to 100 A. The pressure started raising around 80 A. Current was kept 5min at at 100 A, voltage was stable Thursday, January 30, 2020, 09:32  Current ramp set to 1A/20s to 150 A (same pressure limits) Pressure keep increasing during heating Thursday, January 30, 2020, 09:53  Current was kept at 150 min during 5 min, the voltage is stable, pressure started to stabilize: IGP1 = 0.027 Torr TGHT = 0.418 V Ramp set to 1A/min to 200 A. Thursday, January 30, 2020, 10:02 Pressure decreasing: TGHT= 153 A   Thursday, January 30, 2020, 10:15 At 155 A while pressure decreasing, the power supply tripped off, Controls has been notified, waiting for instructions.    Thursday, January 30, 2020, 11:51 Controls respond "It looks like the power supplies were tripped by either the pirani gauge (IEVAP:IGP1) or the Nuclear vent or by both. But, it did not look like that the interlock tree latched the bad condition when the power supplies tripped. I modified the PLC to properly latch the cause of the trip." and gave green light to restart the carbothermal reduction.  Thursday, January 30, 2020, 13:09 IGP1=5.9e-6Torr Ramp set to 1A/10s to 200 A Pressure rising too fast at 200 A, current reduced manually to 190 A Pressure start dropping and system tripped, notify to controls again, "The strip tool shows the vacuum level shoot down to 0 then shoot back up for a quick second but that is enough to tell the PLC that IGP is “bad”" Thursday, January 30, 2020, 15:58  Restarting process to try to trip the system on purpose  Initial pressure IGP1 = 2.7e-6Torr Ramp set to 1/A/10s to 200 A, 0.59 V Ramp set to 2A/10s to 300 A Max pressure during process IGP1 = 0.03 Torr Voltage increased and stabilized (see voltage rising). Ramp kept at 2A/10s to 400 A Thursday, January 30, 2020, 16:48  TGHT = 1.54 V, 399.744 A IGP1 = 0.00016 Torr and going down Ramp set to 2A/10s to 500 A Thursday, January 30, 2020, 17:02  TGHT= 1.9V, 499.2 A IGP1 = 0.00014 Torr Ramp set to 2A/10s to 600 A Ramp set to 0.5 A/min to 700 A, ramp stopped at 680 A Manually tapped to 697 A Pressure dropping indicated that carbothermal reduction is done. Unfortunately, the system did not trip.  Contact Gelo for the  next run, such that he can monitor the system and we can spot the problem.

 Friday, January 31, 2020, 15:35

The EVP1 was vent with Ar and the P2N target was transferred to the glove box.

Marla Cervantes wrote:

Marla Cervantes wrote: Marla Cervantes wrote: Marla Cervantes wrote: Marla Cervantes wrote: Wednesday, January 29 2020, 05:55   A P2N container  with heat shields, and with a UO2/C loaded graphite container was installed in the EVAP1 Chamber is currently being evacuated. Thursday, January 30, 2020, 08:56 Pressure limits: Good vacuum 1e-1 Torr Bad vacuum 5e-1 Torr Initial pressure:  IGP1=1.52e-6Torr Current ramp set to 1A/min to 10 A, voltage is stable. Current ramp increased to 1A/10s to 100 A. The pressure started raising around 80 A. Current was kept 5min at at 100 A, voltage was stable Thursday, January 30, 2020, 09:32  Current ramp set to 1A/20s to 150 A (same pressure limits) Pressure keep increasing during heating Thursday, January 30, 2020, 09:53  Current was kept at 150 min during 5 min, the voltage is stable, pressure started to stabilize: IGP1 = 0.027 Torr TGHT = 0.418 V Ramp set to 1A/min to 200 A. Thursday, January 30, 2020, 10:02 Pressure decreasing: TGHT= 153 A   Thursday, January 30, 2020, 10:15 At 155 A while pressure decreasing, the power supply tripped off, Controls has been notified, waiting for instructions.    Thursday, January 30, 2020, 11:51 Controls respond "It looks like the power supplies were tripped by either the pirani gauge (IEVAP:IGP1) or the Nuclear vent or by both. But, it did not look like that the interlock tree latched the bad condition when the power supplies tripped. I modified the PLC to properly latch the cause of the trip." and gave green light to restart the carbothermal reduction.  Thursday, January 30, 2020, 13:09 IGP1=5.9e-6Torr Ramp set to 1A/10s to 200 A Pressure rising too fast at 200 A, current reduced manually to 190 A Pressure start dropping and system tripped, notify to controls again, "The strip tool shows the vacuum level shoot down to 0 then shoot back up for a quick second but that is enough to tell the PLC that IGP is “bad”" Thursday, January 30, 2020, 15:58  Restarting process to try to trip the system on purpose  Initial pressure IGP1 = 2.7e-6Torr Ramp set to 1/A/10s to 200 A, 0.59 V Ramp set to 2A/10s to 300 A Max pressure during process IGP1 = 0.03 Torr Voltage increased and stabilized (see voltage rising). Ramp kept at 2A/10s to 400 A Thursday, January 30, 2020, 16:48  TGHT = 1.54 V, 399.744 A IGP1 = 0.00016 Torr and going down Ramp set to 2A/10s to 500 A Thursday, January 30, 2020, 17:02  TGHT= 1.9V, 499.2 A IGP1 = 0.00014 Torr Ramp set to 2A/10s to 600 A Ramp set to 0.5 A/min to 700 A, ramp stopped at 680 A Manually tapped to 697 A Pressure dropping indicated that carbothermal reduction is done. Unfortunately, the system did not trip.  Contact Gelo for the  next run, such that he can monitor the system and we can spot the problem.  Friday, January 31, 2020, 15:35 The EVP1 was vent with Ar and the P2N target was transferred to the glove box.

 Thursday, August 13, 2020, 14:33

XRD analysis of the P2N material showed that the carbothermal reduction was not completed

The material was loaded again in its oven, new Ta caps where secured to the edges, the body remained the same

The oven was set in the EVAP1 using Ar to avoid oxidation of the P2N material

Currently pumping down.

 Saturday, August 15, 2020, 14:45 

Vacuum is having a strange behavior, pressure shows that is going from 8e-11 to 4e-6 Torr (fig. 200815-Vaccum_P2N)

Proceeded to turn off turbo pump

Tuesday, August 18, 2020, 10:38

The IGP1 head was replaced with the EVAP1's IGP1 head

The vacuum will be started again

Marla Cervantes wrote:

Marla Cervantes wrote: Marla Cervantes wrote: Marla Cervantes wrote: Marla Cervantes wrote: Marla Cervantes wrote: Wednesday, January 29 2020, 05:55   A P2N container  with heat shields, and with a UO2/C loaded graphite container was installed in the EVAP1 Chamber is currently being evacuated. Thursday, January 30, 2020, 08:56 Pressure limits: Good vacuum 1e-1 Torr Bad vacuum 5e-1 Torr Initial pressure:  IGP1=1.52e-6Torr Current ramp set to 1A/min to 10 A, voltage is stable. Current ramp increased to 1A/10s to 100 A. The pressure started raising around 80 A. Current was kept 5min at at 100 A, voltage was stable Thursday, January 30, 2020, 09:32  Current ramp set to 1A/20s to 150 A (same pressure limits) Pressure keep increasing during heating Thursday, January 30, 2020, 09:53  Current was kept at 150 min during 5 min, the voltage is stable, pressure started to stabilize: IGP1 = 0.027 Torr TGHT = 0.418 V Ramp set to 1A/min to 200 A. Thursday, January 30, 2020, 10:02 Pressure decreasing: TGHT= 153 A   Thursday, January 30, 2020, 10:15 At 155 A while pressure decreasing, the power supply tripped off, Controls has been notified, waiting for instructions.    Thursday, January 30, 2020, 11:51 Controls respond "It looks like the power supplies were tripped by either the pirani gauge (IEVAP:IGP1) or the Nuclear vent or by both. But, it did not look like that the interlock tree latched the bad condition when the power supplies tripped. I modified the PLC to properly latch the cause of the trip." and gave green light to restart the carbothermal reduction.  Thursday, January 30, 2020, 13:09 IGP1=5.9e-6Torr Ramp set to 1A/10s to 200 A Pressure rising too fast at 200 A, current reduced manually to 190 A Pressure start dropping and system tripped, notify to controls again, "The strip tool shows the vacuum level shoot down to 0 then shoot back up for a quick second but that is enough to tell the PLC that IGP is “bad”" Thursday, January 30, 2020, 15:58  Restarting process to try to trip the system on purpose  Initial pressure IGP1 = 2.7e-6Torr Ramp set to 1/A/10s to 200 A, 0.59 V Ramp set to 2A/10s to 300 A Max pressure during process IGP1 = 0.03 Torr Voltage increased and stabilized (see voltage rising). Ramp kept at 2A/10s to 400 A Thursday, January 30, 2020, 16:48  TGHT = 1.54 V, 399.744 A IGP1 = 0.00016 Torr and going down Ramp set to 2A/10s to 500 A Thursday, January 30, 2020, 17:02  TGHT= 1.9V, 499.2 A IGP1 = 0.00014 Torr Ramp set to 2A/10s to 600 A Ramp set to 0.5 A/min to 700 A, ramp stopped at 680 A Manually tapped to 697 A Pressure dropping indicated that carbothermal reduction is done. Unfortunately, the system did not trip.  Contact Gelo for the  next run, such that he can monitor the system and we can spot the problem.  Friday, January 31, 2020, 15:35 The EVP1 was vent with Ar and the P2N target was transferred to the glove box.  Thursday, August 13, 2020, 14:33 XRD analysis of the P2N material showed that the carbothermal reduction was not completed The material was loaded again in its oven, new Ta caps where secured to the edges, the body remained the same The oven was set in the EVAP1 using Ar to avoid oxidation of the P2N material Currently pumping down.  Saturday, August 15, 2020, 14:45  Vacuum is having a strange behavior, pressure shows that is going from 8e-11 to 4e-6 Torr (fig. 200815-Vaccum_P2N) Proceeded to turn off turbo pump Tuesday, August 18, 2020, 10:38 The IGP1 head was replaced with the EVAP1's IGP1 head The vacuum will be started again

 Tuesday, August 18, 2020, 20:44

The pressure reading are normal after swapping the IGP1's gauge head

Wednesday, August 19, 2020, 07:47 

XRD analysis of the P2N material showed that the carbothermal reduction was not completed

The material was loaded again in its oven, new Ta caps where secured to the edges, the body remained the same

The oven was set in the EVAP1 using Ar to avoid oxidation of the P2N material

See elog 263

Wednesday, August 19, 2020, 07:47

Good vacuum 1e-1 Torr

Bad vacuum 5e-1 Torr

IGP1 = 4.11e-6 Torr

Autoramp set to 1A/10s to 150 A.

Wednesday, August 19, 2020, 10:00

TGHT = .45 V, 149.8 A

IGP1 = 9.1e-5 Torr

 Autoramp set to 1A/10s to 200 A.

Wednesday, August 19, 2020, 10:13

TGHT = 0.6 V, 200.2 A

IGP1 = 3e-4 Torr and increasing

After 6 min:

good vacuum =  5e-2 Torr

bad vacuum = 1e-1 Torr

autoramp set to 1A/30s to 250 A

Since the pressure was decreasing, the ramp was changed to  1A/10s to 250 A, vacuum limits remained the same

Wednesday, August 19, 2020, 10:28

Good vacuum 1e-1 Torr

Bad vacuum 5e-1 Torr

IGP1 = 1.7e-4 Torr

TGHT =  0.78 V, 250.1 A

Autoramp set to 2.5 A/10 s to 700 A

Wednesday, August 19, 2020, 11:17

 Good vacuum 1e-1 Torr

Bad vacuum 5e-1 Torr

IGP1 = 2e-4 Torr

TGHT = 2.64 V, 699 A

Autoramp set to 2 A/10 s to 800 A

 Wednesday, August 19, 2020, 11:29

 Good vacuum 1e-1 Torr

Bad vacuum 5e-1 Torr

IGP1 = 5.2e-5 Torr

TGHT = 3.1 V, 798.8 A

Note: Voltage starts to become unstable, an power is around 2.3 kW, pressure has not increased enough to indicate reduction with certainty

In order to reach 3 kW autoramp set to 1A/10 s to 900 A

Wednesday, August 19, 2020, 12:18

The current was increased to 1000 A expecting to see a high peak in pressure but there was not an increase in preasure.

The target is being ramped down to 850 A 

 Tuesday, September 08, 2020, 20:44

A P2N oven with three heat shields, loaded with a graphite container filled with UO2/C ring-discs was set in the EVAP1

EVAP1 is currently being evacuated.

Wednesday, September 09, 2020, 10:11

IGP1 = 4.7e-6 Torr

Good vacuum 1e-1 Torr

Bad vacuum 5e-1 Torr

Autoramp set to 1A/10s to 150 A.

Wednesday, September 09, 2020, 10:50 

TGHT = .32 V, 149.8 A

IGP1 = 6.5e-5 Torr

Autoramp set to 1A/10s to 200 A 

Wednesday, September 09, 2020, 11:00

TGHT =0.46 V, 200 A

IGP1 =  6e-4 Torr and going up

good vacuum =  5e-2 Torr

bad vacuum = 1e-2 Torr

autoramp set to 1A/10s to 250 A

autoramp stopped at 215 A, since pressure kept increasing, the current was manually decreased to 180 A.

 Wednesday, September 09, 2020, 11:16

TGHT = 0.4 V, 179.7 A,

IGP1 = 8.5e-4 Torr an going down

good vacuum =  5e-2 Torr

bad vacuum = 1e-2 Torr

autoramp set to 1A/30s to 200 A

Wednesday, September 09, 2020, 11:32

TGHT = 0.46 V, 200.2 A,

IGP1 = 3e-3 Torr an going down

good vacuum =  5e-2 Torr

bad vacuum = 1e-2 Torr

autoramp set to 1A/30s to 300 A

Wednesday, September 09, 2020, 11:38

IGP1 = 1e-3 Torr 

Since the pressure was decreasing, the ramp was stopped at 210 and changed to  1A/10s to 300 A, vacuum limits remained the same

Wednesday, September 09, 2020, 11:53

The pressure reached the bad vacuum limit 1e-2 Torr and stopped

After ~8min the pressure limits were changed to:

good vacuum =  5e-2 Torr

bad vacuum = 1e-1 Torr

Wednesday, September 09, 2020, 12:05 

IGP1 = 1.15e-3 Torr

Autoramp set to 2.5 A/10 s to 700 A

Pressure increased! and ramp paused at 685 A

re-started autoramp to 700 A at 1A/10s

Wednesday, September 09, 2020, 13:56

Pressure kept increasing after 700 A, so autoramp was set to 750 A at  1A/10s

Pressure kept increasing

At 750 A pressure started reducing, autoramp was set to 760 A at 1A/10 s

System tripped suddenly (Gelo was notified)

The carbothermal reduction seemed complete 

 Thursday, September 10, 2020, 14:01

A P2N target was carbothermal reduced but at the maximum current, the power supply tripped (elog. 267)

Therefore, the target was not hot long enough to fully outgas, that is why it will be reheated.

Desired current 650 A

Thursday, September 10, 2020, 14:07 

IGP1 =  3.3e-6 Torr

Autoramp set to 650 A at 1 A/10 s 

Thursday, September 10, 2020, 16:06

Ramp reached desired current

TGHT = 2.4 V, 649 A

IGP1 = 3e-3 Torr 

 Friday, September 11, 2020, 11:17

TGHT = 2.24 V, 649.2 A

IGP1 = 3.7e-6 Torr

Friday, September 11, 2020, 12:55 

 TGHT = 2.2 V, 648.8 A

IGP1 = 3.7e-6 Torr

Autoramp set to 700 A at 1 A/10 s,

No more gas was released, the system was ramped down to 0 A at 2 A/min

Friday, September 11, 2020, 18:17

TGHT = 0.35 V, 133 A

IGP1 = 2.7e-6 Torr

 Friday, September 11, 2020, 20:01

TGHT = 0 V, 2.56 A

IGP1 = 2.6e-6 Torr

Monday, September 14, 2020, 16:19

EVAP1 was vented with Ar and the P2N material was transferred to the preparatory glove box. 

Green target material characteristics  (elog 105)

#discs = 49

Average disc thickness = 0.453mm

Empty cartridge weight = 9.42 g

Full cartridge weight = 39.86 g

UO2+C weight = 30.44 g 

Tuesday, March 30, 2021, 16:04

The target material was loaded in a P2N oven, wrapped with three heat shields, and set in the EVAP1

EVAP1 is currently being evacuated.

Wednesday, March 31, 2021, 09:42

IGP1 = 3.24e-6 Torr

Good vacuum 1e-1 Torr

Bad vacuum 5e-1 Torr

Autoramp set to 1A/10s to 150 A. 

Wednesday, March 31, 2021, 10:17

TGHT = .54 V, 149.88 A

IGP1 = 6.3e-4 Torr and increasing

Max pressure = 0.06 Torr

Wednesday, March 31, 2021, 10:33 

IGP1= 0.004 Torr

Autoramp set to 1A/10s to 200 A

Wednesday, March 31, 2021, 10:43

Maximum pressure 0.03 Torr and going down

Autoramp set to 1A/10s to 250 A

Wednesday, March 31, 2021, 11:04 

TGHT = 1.1 V, 299.9 A

IGP1 = 6e-4 Torr and going down

Autoramp set to 2.5 A/10 s to 700 A

Wednesday, March 31, 2021, 11:35

Ramp stopped at 690 A

TGHT = 2.9V, 689.1A

IGP1 = 0.127 Torr 

Wednesday, March 31, 2021, 11:37

Autoramp  set to 700 A at 1A/20s

Manually ramped to 740 A (3V) to make sure carbothermal reduction is done.

 Wednesday, March 31, 2021, 12:00

The power supply tripped, Gelo was monitoring the heating process.

Wednesday, March 31, 2021, 14:33

The target will be heated for 4 hours to get read of impurities.

IGP1 = 6e-6 Torr 

Autoramp set to 650 at 1A/10s 

Wednesday, March 31, 2021, 20:37

TGHT = 2.77 V, 669.6A 

IGP1 = 8.5e-6 Torr

EVAP1 ramped down to 0 A at 2 A/min

 Friday, August 17, 2018, 11:17

Four discs of UCx produced with the 1-step casting method were placed in a glass jar.

The mass of the discs was 0.400 g.

The glass jar with the discs were placed in the heating chamber of the IEVAP.

Currently IEVAP is pumping down until vacuum is in the order of  ~10^-6 Torr.

Friday, August 17, 2018, 16:28 

Final vacuum: 9.5x10^-6 Torr

IEVAP's heating chamber will be vented with air and the materials will be taken out.

 Friday, August 17, 2018, 17:27

Material was transferred to the glove box

Monday, October 07, 2019, 09:51 

A TaC coated target container  was loaded with a graphite cartridge with UCx

The target container has 3 heat shields

Tuesday, October 08, 2019, 09:51 

IGP1 = 1.9596e-6 Torr

Autoramp set up to:

TGHT= 1 A/min to 425 A (same current used to reach 1900C in evap2 when sintering TaC coating - e-log 241 evap2)

TBHT= 1 A/min 230 A

The limits are:

Good vacuum 5e-5 Torr

Bad vacuum 8e-5 Torr

Wednesday, October 09, 2019, 13:58

After 4 hours at maximum current, the current was ramped down at 1 A/min for both.

Wednesday, October 09, 2019, 14:00

EVAP1 was vented with Ar, and the target oven was removed to access the Ta cap.

The Ta cap difference in mass was 0.002 g

Wednesday, September 18, 2019, 07:48

A TaC coated target container  was loaded with a graphite cartridge with UCx

The target container has 3 heat shields

IGP1 = 9.3e-6 Torr

Autoramp set up to:

TGHT= 0.2 A/min to 438 A (same current used to reach 1900C in evap2 when sintering TaC coating - elog-455 evap2)

TBHT= 0.1 A/min 230 A

The limits are:

Good vacuum 5e-5 Torr

Bad vacuum 8e-5 Torr

Wednesday, September 18, 2019, 09:55

The autoramp where changed to 1 A/min on both the TGHt and the TGHT.

 Wednesday, September 18, 2019, 21:06

After 4 hours at TGHT = 4.15 V, 437.76 A and TBHT = 2.77 V, 228.31 A (and pressure of 1.07e-5 Torr)

The autoramp was set to TGHT = - 1 A/min and TBHT = -0.5 Torr

Tuesday, September 29, 2019, 14:05

 The EVAP1 was vented with Ar and the target was removed, 

The target was directly assembled after removing it from EVAP1

Finally, the assembly was transferred to the glove box

 Tuesday, September 24, 2019, 06:52

The target UCx28 that was previously conditioned e-log 241, was set again in the EVAP1 for re-conditioning,

the reason was to get rid of all the material that could evaporate from the target and has the potential of clogging the ionizer.

The heating conditions are the same as the previous conditioning:

TGHT= 1 A/min to 438 A (same current used to reach 1900C in evap2 when sintering TaC coating - elog-455 evap2)

TBHT= 1 A/min 230 A

IGP1 = 2.91e-6 Torr

 Wednesday, September 24, 2019, 18:30

IGP1 = 5.77e-6 Torr

The cooling conditions are the same as the previous conditioning:

TGHT= -1 A/min 

TBHT= -0.5 A/min

 Wednesday, September 25, 2019, 13:56

EVAP1 was vented with Ar,

The target container was removed to look at the Ta cap

The Ta cap was coated.

Wednesday, September 25, 2019, 13:58 

A new Ta cap was set in the transfer tube hole and the target container was installed again.

Wednesday, September 25, 2019, 14:00 

The target UCx28 that was previously conditioned , was set again in the EVAP1 for re-conditioning,

the reason was to get rid of all the material that could evaporate from the target and has the potential of clogging the ionizer.

EVAP1 currently pumping down.

Thursday, September 26, 2019, 07:09 

The heating conditions are the same as the previous conditioning:

TGHT= 1 A/min to 438 A (same current used to reach 1900C in evap2 when sintering TaC coating - elog-455 evap2)

TBHT= 1 A/min 230 A

IGP1 = 1.51e-6 Torr

Friday, September 26, 2019, 12:56

The cooling conditions are the same as the previous conditioning:

TGHT= -1 A/min 

TBHT= -0.5 A/min

Friday, September 27, 2019, 17:59

EVAP1 was vented with Ar, the target was removed from the heating chamber to exchange the Ta cap for a new one.

The old Ta cap was not fully coated and it presented a different coloration with respect to the 2 previous caps used for conditioning.

Friday, September 27, 2019, 18:03

The target UCx28 that was previously conditioned , was set again in the EVAP1 for re-conditioning,

the reason was to get rid of all the material that could evaporate from the target and has the potential of clogging the ionizer.

EVAP1 currently pumping down.

Saturday, September 28, 2019, 09:33 

The heating conditions are the same as the previous conditioning:

TGHT= 1 A/min to 438 A (same current used to reach 1900C in evap2 when sintering TaC coating - elog-455 evap2)

TBHT= 1 A/min 230 A

IGP1 = 1.419e-6 Torr

The ramping started at 9:36 am on Septemper 28th 

Sunday, September 29, 2019, 12:30

The cooling conditions are the same as the previous conditioning:

TGHT= -1 A/min 

TBHT= -0.5 A/min

Monday, September 30, 2019, 11:40 

After 23 hours being heated, the target was cooled down and EVAP1 was vented with Ar

The target was removed form EVAP1 and placed in the fumehood.

The tantalum cap used to collect the outgassed material from the target container was not fully coated.

The heat shields of the target container were removed and the target container was inspected,

the ends of the Ta container were crystallized, the area above the graphite cartridge does not have signs of crystallization. 

Monday, September 30, 2019, 10:54 

After being exposed to air for 1.5 hours,

the target UCx28 that was previously conditioned , was set again in the EVAP1 for re-conditioning.

The UCx28 was wrapped with 3 new Ta-heat shields and placed in the EVAP1, 

EVAP1 is currently pumping down.

Tuesday, October 1, 2019, 08:33

The heating conditions are:

TGHT= 1 A/min to 430 A 

TBHT= 1 A/min 230 A

Initial vacuum IGP1 = 1.22193-6 Torr

Since the ends of the target container are crystallized and the voltage is starting to vary, the target was heated only for 3 hours instead of 4.

The cooling conditions are the same as the previous conditioning:

TGHT= -1 A/min 

TBHT= -0.5 A/min

Wednesday, October 02, 2019, 11:01 

EVAP1 was vented with Ar and the target was removed form EVAP1 and assembled,

the assembly was placed in the glove box.

The tantalum cap used to collect the outgassed material from the target container was not fully coated.

 Tuesday, November 05, 2019, 16:43

A TaC coated target container  was loaded with a graphite cartridge with UCx

The target container has 3 heat shields

EVAP1 pumping down

Wednesday, November 06, 2019, 11:46 

IGP1 = 2.09e-6 Torr

Good vacuum 5e-5 Torr

Bad vacuum 8e-5 Torr

Autoramp set up to:

TGHT= 1 A/min to 465 A (same current used to reach 1865 C in evap2 when sintering TaC coating - e-log 464 evap2)

TBHT= 1 A/min 230 A

 Thursday, November 07, 2019, 10:15

After approximately 4 hours at maximum temperature the pressure was 5.85e-6 Torr and the autoramp was set to:

TGHT -1 A/min

TBHT -0.5 A/min

After 4 hours that the current stayed at 0 A, EVAP1 was vented with argon and the target was removed; before transferring the target to the preparatory glove box, the tantalum cap to collect deposits from the target was inspected, there was not deposits on it so it was determined that the conditioning was successful and the target was transferred to the preparatory glove box.

 Friday, May 24, 2019, 15:04

A TaC coated tantalum tube, loaded with graphite foils was transferred to EVAP1

https://elog.triumf.ca/TIS/Evaporator_2/445

The tueb will be heated with the same power used in EVAP2,

the power of the EVAP2 and EVAP1 will be matched using the fit from Document-126503

The chamber is currently pumping down

 Monday, May 27, 2019, 08:58

The current will be tapped to 50 A to replicate the procedure of EVAP2 

then the current will be set to 1 A/min to 500 A and increased to match with EVAP2 power.

 Wednesday, March 27, 2019, 08:50

A graphite insert was set into a tantalum tube in the evaporator 2 for 3 days

The objective of the test was to determine the current and voltage required to reach 2000 C

Current 424.2 A, voltage 7.17 V, P = 3 kW 

details can be find here https://elog.triumf.ca/TIS/Evaporator_2/433

The test will continue for 2 weeks in the EVAP1.

 Good vacuum 5e-4 Torr

Bad vacuum 1.00e-4

Pressure IGP1 = 1.55e-6 Torr

The autoramp was set to 420 A, at 1 A/min,

Monday, April 01, 2019, 07:57

TGHT = 4.68 V, 424.32 A

IGP1 = 9.61e-7 Torr

Autoramop is set to -1 A/min to 0 A

Monday, April 01, 2019, 11:19 

IGP1=5.43e-7 Torr

At TGHT = 223 A and 2.1 V the autoramp was increased to -2 A/min

Monday, April 01, 2019, 11:20

Sudden and unexpected  pressure increment to 1.4e-5 Torr, might be a glitch.

Monday, April 01, 2019, 13:10

IGP1 = 4.34e-7Torr

The autoramp was stopped at TGHT = 17.28 A, 0.0625 V,

and it was lower down to 0 A manually

 Results: The tantalum tube deformed in the contact points with the graphite insert

 Wednesday, April 10, 2019, 13:30

Tantalum foil caps were added to a graphite insert (see picture caps)

 The insert was set in a tantalum tube previously coated and wrapped with 3 Ta sheets.

The system was installed in the EVAP1, and it will be heated for a week at 2000 C.

Currently pumping down.

 Thursday, April 11, 2019, 13:26

IGP1 = 9.9e-7 Torr

The current is tapped to 40 A

After 1hr the autoramp is set to 1 A/min to TGHT 500 A

The TGHT current remained at 500 A for week

until at April 18 at ~4:30 pm

a localized power outage tripped the EVAP1.

The EVAP1 was ventd with air and the tantalum tube was removed

The tantalum tube did not break.

 Friday, April 05, 2019, 10:04

A tantalum tube was coated with TaC and wrapped with Ta heat-shield (3 layers)

Desired temp = 1900 C (expected TGHT ~445A/7.5V), TBHT will be set fixed at 230A (max).

Yesterday the tube was set in the EVAP1 and pumped down.

Friday, April 05, 2019, 10:07 

IGP1= 1.61e-6 Torr

The current is manually tapped to 40 A.

Friday, April 05, 2019, 13:25

After ~2 hours 

IGP1 = 1.54e-6 Torr

TGHT = 0.61 V, 40.39 A

Autoramp is set to 1 A/min to 400 A

Good vac at 3.00-5 Torr

Bad vac at 5.0e-5 Torr.

Sunday, April 07, 2019, 9:00

The current was increased to 424 A

Monday, April 08, 2019, 16:36

EVAP1 vented with air, sintered tube was removed. 

 Tuesday, October 30, 2018, 10:12

A new LP-SIS was coated and syntered (e-log 420 Evaporator_2) 

The container was loaded with a graphite insert loaded with UCx

Graphite insert + UCx mass = 26.927 g

A current of 440 A TGHT and 230 A TBHT will be inputed to the contianer

IGP1 = 8.72e-7 Torr

 The current was tapped manually to 440 A TGHT and 230 A TBHT (see fig. Heatinf test)

Maximum pressure during heating = 1.7e-3 Torr.

Target will stay at maximum current for 1 week.

Marla Cervantes wrote:

Tuesday, October 30, 2018, 10:12 A new LP-SIS was coated and syntered (e-log 420 Evaporator_2)  The container was loaded with a graphite insert loaded with UCx Graphite insert + UCx mass = 26.927 g A current of 440 A TGHT and 230 A TBHT will be inputed to the contianer IGP1 = 8.72e-7 Torr  The current was tapped manually to 440 A TGHT and 230 A TBHT (see fig. Heating test) Maximum pressure during heating = 1.7e-3 Torr. Target will stay at maximum current for 1 week.

 Wednesday, October 31, 2018, 10:09

The current tripped off,  around 5:00 am, the pressure was below 1e-5 Torr (see fig. current-trip_off).

On a previous test, we measured the maximum temperature of the power supply = 33.3 C (e-log 227).

Power supply overheating doesn't seem to be the problem.

EPICS windows are half withe and not answering correctly.

Also, TBHT says that IGP1 < 500 mTorr, and its interlock needs reset (see figure EPICS).

Marla Cervantes wrote:

Marla Cervantes wrote:  Tuesday, October 30, 2018, 10:12 A new LP-SIS was coated and syntered (e-log 420 Evaporator_2)  The container was loaded with a graphite insert loaded with UCx Graphite insert + UCx mass = 26.927 g A current of 440 A TGHT and 230 A TBHT will be inputed to the contianer IGP1 = 8.72e-7 Torr  The current was tapped manually to 440 A TGHT and 230 A TBHT (see fig. Heating test) Maximum pressure during heating = 1.7e-3 Torr. Target will stay at maximum current for 1 week.  Wednesday, October 31, 2018, 10:09 The current tripped off,  around 5:00 am, the pressure was below 1e-5 Torr (see fig. current-trip_off). On a previous test, we measured the maximum temperature of the power supply = 33.3 C (e-log 227). Power supply overheating doesn't seem to be the problem. EPICS windows are half withe and not answering correctly. Also, TBHT says that IGP1 < 500 mTorr, and its interlock needs reset (see figure EPICS).

 Wednesday, October 31, 2018, 15:20

The problem was reported to controls, it will be also reported to power supply group.

In the meantime, the target will be ramp-up again with the auto ramp at:

TGHT = 20 A/min to 440 A

TBHT = 10 A/min to 230 A 

The pressure before heating is 4.07e-7 Torr

Wednesday, October 31, 2018, 19:24

The maximum pressure during heating was 6.57e-6 Torr.

Current pressure 3.00e-6Torr

Wednesday, November 07, 2018, 18:37

IGP1 = 9.7e-7 Torr

 TGHT = -2 A/min to 0A

TBHT = -1 A/min to 0A 

 Thursday, November 08, 2018, 16:16

EVAP1 was vented with Ar, and target was transferred to glove box.

The mass of the loaded graphite insert changed to 26.854 g

That is a difference of 0.075 g

The tantalum container "cathode" crystalized (see fig)

The rest of the tantalum container did not change.

Friday, June 03, 2022, 06:24

A loaded graphite cartridge was set in a tantalum boated and wrapped with 3 tantalum sheets (previous day)

IGP1 = 1.4 e-6 Torr

Good vacuum = 5e-2 Torr

Bad vacuum = 5e-1 Torr

Current ramp is 1A per 10s from 0A  to 80A at 1A/10s.  Then at 1A/min to 120 A, allow degas and then autoramp 1A/10s from 120A to (450-550A)

Friday, June 03, 2022, 06:52

starting autoramp at 1A/min to 120A

Friday, June 03, 2022, 07:30

note*: At approximately 108A the pressure did not rise again but was stable.

Friday, June 03, 2022, 07:46

started autoramp at 1A/10s to 450A 

Friday, June 03, 2022, 09:29

start autoramp to 500A at 1A/min

Friday, June 03, 2022, 09:40

pressure keeps stable as ramping continues. 

increased ramp rate to 2A/min

Friday, June 03, 2022, 09:56

Drop in pressure observed as current increased at 2A/min.

Final current is 490A.  Will keep at this current for 4 hours. 

Friday, June 03, 2022, 14:05

Start auroramp to 400A at -2A/30s

will keep at 400A for 8 hours

Friday, June 03, 2022, 22:06

Start autoramp down at -2A/min to 0A

IGP1= 1.6e-06 Torr

TGHT= 400A, 3.6 V

 Wednesday, July 12, 2017, 17:06

Target container was previously coated with TaC and sintered.

Container is wrapped with 3 layers of Ta-heat shield, including the center block

The target consists of 400 discs of UCx with 13.60cm in length [8 packs of 5 + 360 single discs/ 2.6cm on left side, 2.8cm on right side wrt ionizer into page].

Discs in target are arranged as follows: 1pack / 60singles / 1pack / 60singles / 1pack / 60singles / 2packs / 60singles / 1pack / 60singles / 1pack / 60singles / 1pack

A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down.

The right side is open with a TaC coated spring to help hold materials in.

The chamber is currently pumping down.

TGHT will be ramped up to 450A at 0.1A/min [same current used to reach 1900C in evap2 when sintering TaC coating - elog373 evap2]

Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac.

Thursday, July 13, 2017, 12:49

Tapped up manually to 35A.

Waited ~2hrs, vacuum stable: IG1 = 2.64e-6 Torr

Initiating auto-ramp.

Laura Lambert wrote:

Wednesday, July 12, 2017, 17:06 Target container was previously coated with TaC and sintered. Container is wrapped with 3 layers of Ta-heat shield, including the center block The target consists of 400 discs of UCx with 13.60cm in length [8 packs of 5 + 360 single discs/ 2.6cm on left side, 2.8cm on right side wrt ionizer into page]. Discs in target are arranged as follows: 1pack / 60singles / 1pack / 60singles / 1pack / 60singles / 2packs / 60singles / 1pack / 60singles / 1pack / 60singles / 1pack A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down. The right side is open with a TaC coated spring to help hold materials in. The chamber is currently pumping down. TGHT will be ramped up to 450A at 0.1A/min [same current used to reach 1900C in evap2 when sintering TaC coating - elog373 evap2] Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac. Thursday, July 13, 2017, 12:49 Tapped up manually to 35A. Waited ~2hrs, vacuum stable: IG1 = 2.64e-6 Torr Initiating auto-ramp.

 Thursday, July 13, 2017, 14:48

Update: auto-ramp not started.

With recent updates to evap1 epics, not everything was uploaded correctly.

TGHT auto-ramp system not working: parameter boxes have white outline indicating locked.

No parameters can be inputed and therefore unable to start auto-ramp.

 Friday, July 14, 2017, 15:56

Problems still not fixed.

Have tapped up manually to 50A, 0.59V

Vacuum stable; IG1 = 5.26e-6 Torr.

Will remain at setpoints over weekend before continuing to ramp up manually...

 Monday, July 17, 2017, 15:10

New problems:

Paddle wheels for evap2 need replacing asap [see elog evap2 i.d.378]

In order to replace, supply/ return need to be turned off and a full purge; therefore, evap1 must be off otherwise it will trip off from no water.

Evap2 needs to be fixed asap and cannot wait for this process to be complete.

Evap1 had been tapped up manually to 60A.

Tapping down manually to 0A so one can start the paddle wheel replacement work tomorrow.

 Tuesday, July 18, 2017, 15:31

Paddle wheels for evap2 replaced and up and running again.

IG1 = 1.2e-6 Torr.

Starting to tap back-up manually...

Laura Lambert wrote:

Laura Lambert wrote:  Wednesday, July 12, 2017, 17:06 Target container was previously coated with TaC and sintered. Container is wrapped with 3 layers of Ta-heat shield, including the center block The target consists of 400 discs of UCx with 13.60cm in length [8 packs of 5 + 360 single discs/ 2.6cm on left side, 2.8cm on right side wrt ionizer into page]. Discs in target are arranged as follows: 1pack / 60singles / 1pack / 60singles / 1pack / 60singles / 2packs / 60singles / 1pack / 60singles / 1pack / 60singles / 1pack A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down. The right side is open with a TaC coated spring to help hold materials in. The chamber is currently pumping down. TGHT will be ramped up to 450A at 0.1A/min [same current used to reach 1900C in evap2 when sintering TaC coating - elog373 evap2] Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac. Thursday, July 13, 2017, 12:49 Tapped up manually to 35A. Waited ~2hrs, vacuum stable: IG1 = 2.64e-6 Torr Initiating auto-ramp.    Thursday, July 13, 2017, 14:48 Update: auto-ramp not started. With recent updates to evap1 epics, not everything was uploaded correctly. TGHT auto-ramp system not working: parameter boxes have white outline indicating locked. No parameters can be inputed and therefore unable to start auto-ramp.  Friday, July 14, 2017, 15:56 Problems still not fixed. Have tapped up manually to 50A, 0.59V Vacuum stable; IG1 = 5.26e-6 Torr. Will remain at setpoints over weekend before continuing to ramp up manually...  Monday, July 17, 2017, 15:10 New problems: Paddle wheels for evap2 need replacing asap [see elog evap2 i.d.378] In order to replace, supply/ return need to be turned off and a full purge; therefore, evap1 must be off otherwise it will trip off from no water. Evap2 needs to be fixed asap and cannot wait for this process to be complete. Evap1 had been tapped up manually to 60A. Tapping down manually to 0A so one can start the paddle wheel replacement work tomorrow.  Tuesday, July 18, 2017, 15:31 Paddle wheels for evap2 replaced and up and running again. IG1 = 1.2e-6 Torr. Starting to tap back-up manually...

 Wednesday, July 19, 2017, 14:12

TGHT auto-ramp fixed.

Since TBHT isn't hooked up yet, epics thinks TBHT has tripped off.

Currently during auto-ramp, every time steps up: states TBHT tripped off.

This is not the case but not a big deal as we will soon have TBHT hooked up and this won't be an issue.

Also it only states it, doesn't stop auto-ramp and therefore technically works fine/ will go with this for now...

Note: Might be a few spikes on striptool from past hour when IOC was rebooted.

Laura Lambert wrote:

Laura Lambert wrote: Laura Lambert wrote:  Wednesday, July 12, 2017, 17:06 Target container was previously coated with TaC and sintered. Container is wrapped with 3 layers of Ta-heat shield, including the center block The target consists of 400 discs of UCx with 13.60cm in length [8 packs of 5 + 360 single discs/ 2.6cm on left side, 2.8cm on right side wrt ionizer into page]. Discs in target are arranged as follows: 1pack / 60singles / 1pack / 60singles / 1pack / 60singles / 2packs / 60singles / 1pack / 60singles / 1pack / 60singles / 1pack A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down. The right side is open with a TaC coated spring to help hold materials in. The chamber is currently pumping down. TGHT will be ramped up to 450A at 0.1A/min [same current used to reach 1900C in evap2 when sintering TaC coating - elog373 evap2] Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac. Thursday, July 13, 2017, 12:49 Tapped up manually to 35A. Waited ~2hrs, vacuum stable: IG1 = 2.64e-6 Torr Initiating auto-ramp.    Thursday, July 13, 2017, 14:48 Update: auto-ramp not started. With recent updates to evap1 epics, not everything was uploaded correctly. TGHT auto-ramp system not working: parameter boxes have white outline indicating locked. No parameters can be inputed and therefore unable to start auto-ramp.  Friday, July 14, 2017, 15:56 Problems still not fixed. Have tapped up manually to 50A, 0.59V Vacuum stable; IG1 = 5.26e-6 Torr. Will remain at setpoints over weekend before continuing to ramp up manually...  Monday, July 17, 2017, 15:10 New problems: Paddle wheels for evap2 need replacing asap [see elog evap2 i.d.378] In order to replace, supply/ return need to be turned off and a full purge; therefore, evap1 must be off otherwise it will trip off from no water. Evap2 needs to be fixed asap and cannot wait for this process to be complete. Evap1 had been tapped up manually to 60A. Tapping down manually to 0A so one can start the paddle wheel replacement work tomorrow.  Tuesday, July 18, 2017, 15:31 Paddle wheels for evap2 replaced and up and running again. IG1 = 1.2e-6 Torr. Starting to tap back-up manually...    Wednesday, July 19, 2017, 14:12 TGHT auto-ramp fixed. Since TBHT isn't hooked up yet, epics thinks TBHT has tripped off. Currently during auto-ramp, every time steps up: states TBHT tripped off. This is not the case but not a big deal as we will soon have TBHT hooked up and this won't be an issue. Also it only states it, doesn't stop auto-ramp and therefore technically works fine/ will go with this for now... Note: Might be a few spikes on striptool from past hour when IOC was rebooted.

 Wednesday, July 19, 2017, 14:16

Tapped up manually to 30A yesterday.

Continued manual tap up today and reached 60A.

Initiated auto-ramp.

IG1 = 4.4e-6 Torr

Laura Lambert wrote:

Laura Lambert wrote: Laura Lambert wrote: Laura Lambert wrote:  Wednesday, July 12, 2017, 17:06 Target container was previously coated with TaC and sintered. Container is wrapped with 3 layers of Ta-heat shield, including the center block The target consists of 400 discs of UCx with 13.60cm in length [8 packs of 5 + 360 single discs/ 2.6cm on left side, 2.8cm on right side wrt ionizer into page]. Discs in target are arranged as follows: 1pack / 60singles / 1pack / 60singles / 1pack / 60singles / 2packs / 60singles / 1pack / 60singles / 1pack / 60singles / 1pack A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down. The right side is open with a TaC coated spring to help hold materials in. The chamber is currently pumping down. TGHT will be ramped up to 450A at 0.1A/min [same current used to reach 1900C in evap2 when sintering TaC coating - elog373 evap2] Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac. Thursday, July 13, 2017, 12:49 Tapped up manually to 35A. Waited ~2hrs, vacuum stable: IG1 = 2.64e-6 Torr Initiating auto-ramp.    Thursday, July 13, 2017, 14:48 Update: auto-ramp not started. With recent updates to evap1 epics, not everything was uploaded correctly. TGHT auto-ramp system not working: parameter boxes have white outline indicating locked. No parameters can be inputed and therefore unable to start auto-ramp.  Friday, July 14, 2017, 15:56 Problems still not fixed. Have tapped up manually to 50A, 0.59V Vacuum stable; IG1 = 5.26e-6 Torr. Will remain at setpoints over weekend before continuing to ramp up manually...  Monday, July 17, 2017, 15:10 New problems: Paddle wheels for evap2 need replacing asap [see elog evap2 i.d.378] In order to replace, supply/ return need to be turned off and a full purge; therefore, evap1 must be off otherwise it will trip off from no water. Evap2 needs to be fixed asap and cannot wait for this process to be complete. Evap1 had been tapped up manually to 60A. Tapping down manually to 0A so one can start the paddle wheel replacement work tomorrow.  Tuesday, July 18, 2017, 15:31 Paddle wheels for evap2 replaced and up and running again. IG1 = 1.2e-6 Torr. Starting to tap back-up manually...    Wednesday, July 19, 2017, 14:12 TGHT auto-ramp fixed. Since TBHT isn't hooked up yet, epics thinks TBHT has tripped off. Currently during auto-ramp, every time steps up: states TBHT tripped off. This is not the case but not a big deal as we will soon have TBHT hooked up and this won't be an issue. Also it only states it, doesn't stop auto-ramp and therefore technically works fine/ will go with this for now... Note: Might be a few spikes on striptool from past hour when IOC was rebooted.    Wednesday, July 19, 2017, 14:16 Tapped up manually to 30A yesterday. Continued manual tap up today and reached 60A. Initiated auto-ramp. IG1 = 4.4e-6 Torr

 Thursday, July 20, 2017, 14:48

TGHT tripped off yesterday evening 

Auto-ramping was fixed but a few more glitches in the system caused the TGHT to trip.

Please refer to photos.

When auto-ramp is running and vacuum reaches the parameter set for 'Good Vacuum', the auto-ramp should stop until the vacuum drops below the good vacuum at which point it can then continue to auto-ramp.

When auto-ramp is running and vacuum reaches the parameter set for 'Bad Vacuum', the auto-ramp should initiate auto-cool/ramp-down until the vacuum drops to the good vacuum parameter at which point it can then proceed with the 'Good Vacuum' requirement.

With this scenario, the auto-ramp system ignored the parameters set for good and bad vacuum, proceeded past both points and continued to ramp until the vacuum eventually reached it's trip off vacuum causing the TGHT to trip.

The TGHT current was at ~90A when it tripped off, so the target should be OK.

Laura Lambert wrote:

Laura Lambert wrote: Laura Lambert wrote: Laura Lambert wrote: Laura Lambert wrote:  Wednesday, July 12, 2017, 17:06 Target container was previously coated with TaC and sintered. Container is wrapped with 3 layers of Ta-heat shield, including the center block The target consists of 400 discs of UCx with 13.60cm in length [8 packs of 5 + 360 single discs/ 2.6cm on left side, 2.8cm on right side wrt ionizer into page]. Discs in target are arranged as follows: 1pack / 60singles / 1pack / 60singles / 1pack / 60singles / 2packs / 60singles / 1pack / 60singles / 1pack / 60singles / 1pack A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down. The right side is open with a TaC coated spring to help hold materials in. The chamber is currently pumping down. TGHT will be ramped up to 450A at 0.1A/min [same current used to reach 1900C in evap2 when sintering TaC coating - elog373 evap2] Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac. Thursday, July 13, 2017, 12:49 Tapped up manually to 35A. Waited ~2hrs, vacuum stable: IG1 = 2.64e-6 Torr Initiating auto-ramp.    Thursday, July 13, 2017, 14:48 Update: auto-ramp not started. With recent updates to evap1 epics, not everything was uploaded correctly. TGHT auto-ramp system not working: parameter boxes have white outline indicating locked. No parameters can be inputed and therefore unable to start auto-ramp.  Friday, July 14, 2017, 15:56 Problems still not fixed. Have tapped up manually to 50A, 0.59V Vacuum stable; IG1 = 5.26e-6 Torr. Will remain at setpoints over weekend before continuing to ramp up manually...  Monday, July 17, 2017, 15:10 New problems: Paddle wheels for evap2 need replacing asap [see elog evap2 i.d.378] In order to replace, supply/ return need to be turned off and a full purge; therefore, evap1 must be off otherwise it will trip off from no water. Evap2 needs to be fixed asap and cannot wait for this process to be complete. Evap1 had been tapped up manually to 60A. Tapping down manually to 0A so one can start the paddle wheel replacement work tomorrow.  Tuesday, July 18, 2017, 15:31 Paddle wheels for evap2 replaced and up and running again. IG1 = 1.2e-6 Torr. Starting to tap back-up manually...    Wednesday, July 19, 2017, 14:12 TGHT auto-ramp fixed. Since TBHT isn't hooked up yet, epics thinks TBHT has tripped off. Currently during auto-ramp, every time steps up: states TBHT tripped off. This is not the case but not a big deal as we will soon have TBHT hooked up and this won't be an issue. Also it only states it, doesn't stop auto-ramp and therefore technically works fine/ will go with this for now... Note: Might be a few spikes on striptool from past hour when IOC was rebooted.    Wednesday, July 19, 2017, 14:16 Tapped up manually to 30A yesterday. Continued manual tap up today and reached 60A. Initiated auto-ramp. IG1 = 4.4e-6 Torr    Thursday, July 20, 2017, 14:48 TGHT tripped off yesterday evening  Auto-ramping was fixed but a few more glitches in the system caused the TGHT to trip. Please refer to photos. When auto-ramp is running and vacuum reaches the parameter set for 'Good Vacuum', the auto-ramp should stop until the vacuum drops below the good vacuum at which point it can then continue to auto-ramp. When auto-ramp is running and vacuum reaches the parameter set for 'Bad Vacuum', the auto-ramp should initiate auto-cool/ramp-down until the vacuum drops to the good vacuum parameter at which point it can then proceed with the 'Good Vacuum' requirement. With this scenario, the auto-ramp system ignored the parameters set for good and bad vacuum, proceeded past both points and continued to ramp until the vacuum eventually reached it's trip off vacuum causing the TGHT to trip. The TGHT current was at ~90A when it tripped off, so the target should be OK.

 Thursday, July 20, 2017, 15:14

Turns out the auto-ramp was reading the vacuum of 'IGP1' which is what the old ion gauge used to be called for evap1 and is currently one on evap2

AKA attempting to take a vacuum reading from one that doesn't exist for evap1

This ion gauge is now labelled 'IGP' and the auto-ramp system now uses 'IGP' for the vacuum parameter confirmations.

Changed a few things in the auto-ramp system:

-Updated messages.

-Auto-ramp aborts when TGHT/TBHT trips off.

-Displays setpoint it is ramping up to for next step

-Confirms which ion gauge it is reading

-Displays final setpoint and increment on message board

-No longer displays TBHT as 'tripped off' when not running.

System updated.

Laura Lambert wrote:

Laura Lambert wrote: Laura Lambert wrote: Laura Lambert wrote: Laura Lambert wrote: Laura Lambert wrote:  Wednesday, July 12, 2017, 17:06 Target container was previously coated with TaC and sintered. Container is wrapped with 3 layers of Ta-heat shield, including the center block The target consists of 400 discs of UCx with 13.60cm in length [8 packs of 5 + 360 single discs/ 2.6cm on left side, 2.8cm on right side wrt ionizer into page]. Discs in target are arranged as follows: 1pack / 60singles / 1pack / 60singles / 1pack / 60singles / 2packs / 60singles / 1pack / 60singles / 1pack / 60singles / 1pack A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down. The right side is open with a TaC coated spring to help hold materials in. The chamber is currently pumping down. TGHT will be ramped up to 450A at 0.1A/min [same current used to reach 1900C in evap2 when sintering TaC coating - elog373 evap2] Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac. Thursday, July 13, 2017, 12:49 Tapped up manually to 35A. Waited ~2hrs, vacuum stable: IG1 = 2.64e-6 Torr Initiating auto-ramp.    Thursday, July 13, 2017, 14:48 Update: auto-ramp not started. With recent updates to evap1 epics, not everything was uploaded correctly. TGHT auto-ramp system not working: parameter boxes have white outline indicating locked. No parameters can be inputed and therefore unable to start auto-ramp.  Friday, July 14, 2017, 15:56 Problems still not fixed. Have tapped up manually to 50A, 0.59V Vacuum stable; IG1 = 5.26e-6 Torr. Will remain at setpoints over weekend before continuing to ramp up manually...  Monday, July 17, 2017, 15:10 New problems: Paddle wheels for evap2 need replacing asap [see elog evap2 i.d.378] In order to replace, supply/ return need to be turned off and a full purge; therefore, evap1 must be off otherwise it will trip off from no water. Evap2 needs to be fixed asap and cannot wait for this process to be complete. Evap1 had been tapped up manually to 60A. Tapping down manually to 0A so one can start the paddle wheel replacement work tomorrow.  Tuesday, July 18, 2017, 15:31 Paddle wheels for evap2 replaced and up and running again. IG1 = 1.2e-6 Torr. Starting to tap back-up manually...    Wednesday, July 19, 2017, 14:12 TGHT auto-ramp fixed. Since TBHT isn't hooked up yet, epics thinks TBHT has tripped off. Currently during auto-ramp, every time steps up: states TBHT tripped off. This is not the case but not a big deal as we will soon have TBHT hooked up and this won't be an issue. Also it only states it, doesn't stop auto-ramp and therefore technically works fine/ will go with this for now... Note: Might be a few spikes on striptool from past hour when IOC was rebooted.    Wednesday, July 19, 2017, 14:16 Tapped up manually to 30A yesterday. Continued manual tap up today and reached 60A. Initiated auto-ramp. IG1 = 4.4e-6 Torr    Thursday, July 20, 2017, 14:48 TGHT tripped off yesterday evening  Auto-ramping was fixed but a few more glitches in the system caused the TGHT to trip. Please refer to photos. When auto-ramp is running and vacuum reaches the parameter set for 'Good Vacuum', the auto-ramp should stop until the vacuum drops below the good vacuum at which point it can then continue to auto-ramp. When auto-ramp is running and vacuum reaches the parameter set for 'Bad Vacuum', the auto-ramp should initiate auto-cool/ramp-down until the vacuum drops to the good vacuum parameter at which point it can then proceed with the 'Good Vacuum' requirement. With this scenario, the auto-ramp system ignored the parameters set for good and bad vacuum, proceeded past both points and continued to ramp until the vacuum eventually reached it's trip off vacuum causing the TGHT to trip. The TGHT current was at ~90A when it tripped off, so the target should be OK.    Thursday, July 20, 2017, 15:14 Turns out the auto-ramp was reading the vacuum of 'IGP1' which is what the old ion gauge used to be called for evap1 and is currently one on evap2 AKA attempting to take a vacuum reading from one that doesn't exist for evap1 This ion gauge is now labelled 'IGP' and the auto-ramp system now uses 'IGP' for the vacuum parameter confirmations. Changed a few things in the auto-ramp system: -Updated messages. -Auto-ramp aborts when TGHT/TBHT trips off. -Displays setpoint it is ramping up to for next step -Confirms which ion gauge it is reading -Displays final setpoint and increment on message board -No longer displays TBHT as 'tripped off' when not running. System updated.

Thursday, July 20, 2017, 15:57

Tapped up manually to 35A, 0.45V

IG1 = 5.26e-6 Torr

Re-initiated auto-ramp at 0.1A/min.

 Friday, July 21, 2017, 13:50

TGHT = 81A, 0.92V

IG1 = 5.2e-5 Torr

Vacuum currently yo-yo-ing, but stable.

Changing vacuum limits.

Vacuum limit stop at 1.0e-4 Torr, backing off at 5.0e-4 Torr.

TP = 28.4C, RT = 27.3C

 Thursday, July 27, 2017, 09:02

TGHT = 431A, 4.37V

IG1 = 1.32e-5 Torr

Vacuum stable.

Increasing ramping rate to 0.2A/min

TP = 26.7C, RT = 22.0C

 Friday, July 28, 2017, 09:35

TGHT = 450A, 4.59V

IG1 = 5.4e-6 Torr

Target has remained at max setpoint for 23hrs.

TP = 25.9C, RT = 19.5C

Initiating auto-cool at 1.0A/min

 Friday, August 04, 2017, 13:59

Evap1 was vented in Ar and transferred to the glove box on monday.

A few discs on opened end had slightly shifted [see photo], discs moved back in place - can see down into target.

Discoloration of Ta container to gold in some spots - this is normal as seen with most UCx targets

Target looks good.

Still requires 2nd endcap to be inserted.

 Monday, August 21, 2017, 11:13

Both endcaps in.

No Rh foil inserted.

Endcaps require expanding.

 Tuesday, March 20, 2018, 14:43

Target container was previously coated with TaC and sintered.

Container is wrapped with 3 layers of Ta-heat shield, including the center block

The target consists of 230 discs of UCx with 7.28cm in length [6 packs of 5 + 200 single discs].

Discs in target are arranged as follows: 1pack / 55singles / 1pack / 50singles / 2packs / 50singles / 1pack / 45singles / 1pack

A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down.

The right side is open with a TaC coated spring to help hold materials in.

An extra 5 single discs are loaded on the right side on top of the last pack, these discs will be removed after conditioning and analysed using SEM and XRD

The chamber is currently pumping down.

TGHT will be ramped up to 445A and TBHT will be ramped up to 230A [same parameters used to reach 1900C in evap2 when sintering TaC coating - elog402 evap2]

NOTE: This will be the first UCx target to go online using the TBHT in evap1 after the target is loaded with materials.

 Wednesday, March 21, 2018, 09:37

IGP1 = 2.47e-6 Torr

Tapped up manually to 40A.

TGHT = 40A, 0.61V

TBHT = 40A, 0.78V

Waited ~1hr, vacuum stable IG1 = 9.3e-6 Torr

Initiating auto-ramp for TGHT at a rate of 0.2A/min

Initiating auto-ramp for TBHT at a rate of 0.1A/min

Parameter setup: 5.0e-5 good vac, 8.0e-5 bad vac.

Wednesday, March 21, 2018, 13:02

TGHT = 57A, 0.72V

TBHT = 48A, 0.85V

IG1 = 5.8e-5 Torr

Vacuum stable.

Changing vacuum limits.

Vacuum limit stop at 3.0e-4 Torr, backing off at 6.0e-4 Torr.

 Monday, March 26, 2018, 09:32

TGHT = 450A, 4.54V

TBHT = 230A, 2.75V

IGP1 = 8.99e-7 Torr

Target has remained at max setpoint over weekend.

Initiating auto-cool at 1.0A/min for the TGHT and 0.5A/min for the TBHT.

 Wednesday, March 28, 2018, 11:31

Evap1 was vented in Ar and transferred to the glove box yesterday.

Inspection of target still required as well as 2nd endcap to be inserted.

 Thursday, February 16, 2017, 15:04

Target container was previously coated with TaC spray and sintered.

Container is wrapped with 3 layers of Ta-heat shield, including the center block

The target consists of 200 discs of UCx with 7.3cm in length [6 packs of 5 + 170 single discs].

Discs in target are arranged as follows: 5singles / 1pack / 40singles / 1pack / 40singles / 2packs / 40singles / 1pack / 40singles / 1pack / 5singles

A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down.

The right side is open with a TaC coated spring to help hold materials in.

The chamber is currently pumping down.

TGHT will be ramped up to 475A at 0.1A/min [same current used to reach 1900C in evap2 when sintering TaC coating - elog340 evap2]

Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac.

NOTE: small bug in evap1 IOC. when current is tapped up 1A, it auto-taps back down 0.01A. should be OK, but will keep an eye on evaporator during conditioning process and acct for changes.

 Friday, February 17, 2017, 09:56

IG1 = 1.56e-6 Torr

Tapped up manually to 35A

Vacuum stable.

IG1 = 1.56e-6 Torr.

Initiating auto-ramp.

 Friday, February 24, 2017, 15:09

Local TGHT 473 A 4.63 V

Monday, February 27, 2017, 09:06 

Target has remained at max setpoints for 20+hrs [epics problems and archives currently not working so unable to find out exact time]

TGHT = 475A, 4.67V

IG1 = 1.48e-6 Torr

Conditioning process is now complete.

Initiating auto-cool at 1.0A/min

 Tuesday, February 28, 2017, 12:00

UCx conditioning process complete.

Vented in Ar and transferred to glove box this morning.

 Tuesday, April 11, 2017, 09:44

A few photos taken of the target post-conditioning.

Note a few flakes came out from one end - end disc from 'open' side flaked off.

 Thursday, April 20, 2017, 11:31

Target container was previously coated with TaC spray and sintered.

Container is wrapped with 3 layers of Ta-heat shield, including the center block

The target consists of 220 discs of UCx with 7.55cm in length [6 packs of 5 + 190 single discs].

Discs in target are arranged as follows: 1pack / 45singles / 1pack / 50singles / 2packs / 50singles / 1pack / 45singles / 1pack

A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down.

The right side is open with a TaC coated spring to help hold materials in.

The chamber is currently pumping down.

TGHT will be ramped up to 490A at 0.1A/min [same current used to reach 1900C in evap2 when sintering TaC coating - elog350 evap2]

Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac.

 Friday, April 21, 2017, 10:14

IG1 = 2.47e-6 Torr

Tapped up manually to 35A.

Waited ~1.5hrs, vacuum stable IG1 = 2.37e-6 Torr

Initiating auto-ramp.

 Thursday, April 27, 2017, 09:19

IG1 = 4.611e-6 Torr

TGHT = 490A, 4.93V

Target has remained at max setpoints for ~9hrs.

Initiating auto-cool at 1.0A/min

 Tuesday, May 16, 2017, 13:21

Update: 

Target looks good, see photos attached post sintering.

Gold tint on container commonly seen with the Uranium targets.

Orange colouring on inside of container end - also common.

Both endcaps in and handed off to assembly yesterday.

 Wednesday, October 19, 2016, 16:47

Target container was previously coated with TaC spray and sintered.

Container is wrapped with 3 layers of Ta-heat shield, including the center block using one single foil/ layer

The target consists of 165 discs of UCx with 5.4cm in length

Materials: 4 packs of 5 {all made with 'modified' UC2cast} + 145 single discs{20 from 'modified cast'}

A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down.

The right side is open with a TaC coated spring to help hold materials in.

The chamber is currently pumping down.

TGHT will be ramped up to 430A at 0.1A/min [same current used to reach 1900C in evap2 when sintering TaC coating - elog327 evap2]

Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac.

Thursday, October 20, 2016, 10:11

Tapped up manually to 40A

Vacuum stable.

IG1 = 4.45e-6 Torr.

Initiating auto-ramp.

 Monday, October 24, 2016, 11:19

TGHT = 254A, 2.46V

Still ramping up...~half way to final setpoint

Vacuum dropped, looks good, IG1 = 6.77e-6 Torr

 Wednesday, October 26, 2016, 09:38

Target has remained at max setpoints for ~16hrs.

TGHT = 430A, 4.25V

IG1 = 2.3e-6 Torr

Conditioning/ re-carbonization process is now complete.

Initiating auto-cool at 1.0A/min

 Thursday, October 27, 2016, 15:35

UCx done.

Vented in Ar and transferred to glove box.

Looked inside before inserting 2nd endcap - clean view all the way through the materials to the endcap/ no visible shifting.

Ta coated spring helped hold materials in place, materials expanded minimally ~0.5cm

Pushed materials back to desired length.

Successfully removed a single disc for further analysis.

Second endcap now in with 2x graphite foils.

Both endcaps need expanding.

Ready for assembly.

Requires Rh foil - to be inserted during assembly.

Monday, July 11, 2016, 15:54

Target container was previously coated with TaC spray and sintered.

Container is wrapped with 3 layers of Ta-heat shield, including the center block - new wrapping method-see elog112 evap2

The target consists of 216 discs of UCx with 7.6cm in length [4 packs of 5 + 196 single discs].

A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down.

The right side is open with a TaC coated spring to help hold materials in.

The chamber is currently pumping down.

TGHT will be ramped up to 410A at 0.1A/min [same current used to reach 1900C in evap2 when sintering TaC coating - elog308 evap2]

Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac.

 Tuesday, July 12, 2016, 08:50

IG1 = 5.3e-6 Torr

Tapped up manually to 35A

Vacuum stable.

IG1 = 5.25e-6 Torr.

Initiating auto-ramp.

 Friday, July 15, 2016, 16:59

With evap2 not working, water was turned off to check valves...this tripped off evap1 since this also turned off the water to evap1.

TGHT was ~115A when evap1 tripped off.

Vacuum stable = 2.9e-6 Torr.

Tapped back up manually to 115A, 1.08V

Vacuum stable = 2.8e-6 Torr.

Restarting auto ramp at 0.1A/min.

 Friday, July 22, 2016, 16:25

Target has remained at max setpoints for 4.5days.

TGHT = 410A, 3.99V

IG1 = 2.5e-6 Torr

Voltage has wavered a small amount, between 3,91V-4.02V; this can be seen in the photo attached of the screenshot of the striptool.

Conditioning process is now complete.

Initiating auto-cool at 1.0A/min

 Tuesday, July 26, 2016, 16:48

Vented in Ar and currently transfering into glove box

will update elog tomorrow...

 Wednesday, July 27, 2016, 14:56

had a few problems with the transfer chamber in the glove box, but managed to get the target into the glove box okay last night.

was exposed to oxygen for minimal amount of time - transfer chamber wasnt flushing properly/ leak in james bond box

 Thursday, May 10, 2018, 16:00 

Graphite insert fully loaded with UCx was loaded into previously TaC coated target container.

No end caps on Ta target container.

Weight of graphite tube + UCx discs = 27 g

Currently pumping down in evap1.

Friday, May 11, 2018, 11:41 

IGP1 = 1.13e-6 Torr

Good vac at 3.0e-4, bad vac at 6.0e-4 Torr.

Tapped up manually to 100A.

Pressure increased to ~2e-5 Torr

Vacuum stabilized after 40 min

IGP1 = 1e-5 Torr

Initiating auto ramp for TGHT @ 20 A/min to a max setpoint of 520 A

Initiating auto ramp for TBHT @ 10 A/min to a max setpoint of 245 A

Preassure increased o 1e-4 Torr and the auto ramp was aborted

After 8 min IGP1 = 3e-5 Torr

Initiating auto ramp for TGHT @ 10 A/min to a max setpoint of 520 A

Initiating auto ramp for TBHT @ 5 A/min to a max setpoint of 245 A

The vacuum is more stable.

TBHT reached 230 A at 13:00

TGHT reached 520 A at 13:24

Final pressure 1.15e-4 Torr

Target will stay at max current point for a week.

 Friday, May 18, 2018, 18:31

Evap1 was vented in Ar and UCx target was transferred to the glove box

 Monday, September 03, 2018, 10:17

Graphite insert fully loaded with UCx was loaded into previously TaC coated target container.

No end caps on Ta target container.

Weight of graphite tube + UCx discs = 27.118 g

Currently pumping down in evap1.

Tuesday, September 04, 2018, 10:17 

IGP1 = 4.02e-6 Torr

Tapped up TBHT and TGHT manually to 100 A @1 A/s with pauses of 20 s.

Wait for 40 min to pressure to stabilize.

Max pressure 1.38e-4 Torr.

Final pressure 5.93e-5 Torr.

Tuesday, September 04, 2018, 11:46 

Good vacuum 5e-1 Torr

Bad vacuum 8e-1 Torr

Initiating auto ramp for TGHT @ 10 A/min to a max setpoint of 520 A

Initiating auto ramp for TBHT @ 5 A/min to a max setpoint of 245 A

 After achieving 520 A with auto ramp, manually tapped to 599 A.

Manually tapped back to 550 A.

Marla Cervantes wrote:

Monday, September 03, 2018, 10:17 Graphite insert fully loaded with UCx was loaded into previously TaC coated target container. No end caps on Ta target container. Weight of graphite tube + UCx discs = 27.118 g Currently pumping down in evap1. Tuesday, September 04, 2018, 10:17  IGP1 = 4.02e-6 Torr Tapped up TBHT and TGHT manually to 100 A @1 A/s with pauses of 20 s. Wait for 40 min to pressure to stabilize. Max pressure 1.38e-4 Torr. Final pressure 5.93e-5 Torr. Tuesday, September 04, 2018, 11:46  Good vacuum 5e-1 Torr Bad vacuum 8e-1 Torr Initiating auto ramp for TGHT @ 10 A/min to a max setpoint of 520 A Initiating auto ramp for TBHT @ 5 A/min to a max setpoint of 245 A  Tuesday, September 04, 2018, 12:54  After achieving 520 A with auto ramp, manually tapped to 599 A. Manually tapped back to 550 A.

 Friday, September 21, 2018, 10:21

Ramping down heaters at 2 A/min and 1 A/min for TGHT and TBHT.

Marla Cervantes wrote:

Monday, September 03, 2018, 10:17 Graphite insert fully loaded with UCx was loaded into previously TaC coated target container. No end caps on Ta target container. Weight of graphite tube + UCx discs = 27.118 g Currently pumping down in evap1. Tuesday, September 04, 2018, 10:17  IGP1 = 4.02e-6 Torr Tapped up TBHT and TGHT manually to 100 A @1 A/s with pauses of 20 s. Wait for 40 min to pressure to stabilize. Max pressure 1.38e-4 Torr. Final pressure 5.93e-5 Torr. Tuesday, September 04, 2018, 11:46  Good vacuum 5e-1 Torr Bad vacuum 8e-1 Torr Initiating auto ramp for TGHT @ 10 A/min to a max setpoint of 520 A Initiating auto ramp for TBHT @ 5 A/min to a max setpoint of 245 A  Tuesday, September 04, 2018, 12:54  After achieving 520 A with auto ramp, manually tapped to 599 A. Manually tapped back to 550 A.

 Saturday, September 29, 2018, 20:52

Target is taken out from the chamber and transferred to the Ar glove box.

Friday, March 20, 2015, 15:17 

Target container was previously coated with TaC spray and sintered.

It's is wrapped with 3 layers of Ta-heat shield, including the center block.

The target consists of 225 discs of UCx with 9.2cm in length.

Packing step was skipped for first time, loaded singular discs into target container, no binder holding discs together.

A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down, so the right is open.

The chamber is currently pumping down.

TGHT will be ramped up to 520A - keep heating the current for 4-5 hours.

Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac.

Auto ramp at 0.1A/min.

 Monday, March 23, 2015, 09:09

IOC has been rebooted.

Ion gauge won't turn on - goes into drive, then times out...

 Monday, March 23, 2015, 15:06

Both filaments in IG1 are burnt out.

EVAP1 will be vented tomorrow morning.

UCx will be placed in the pelican case under argon while the filaments are being replaced in the morning.

 Tuesday, March 24, 2015, 11:27

Vented in argon and placed target in pelican case.

Ion gauge replaced this morning.

Continued purging evap1 and re-installed UCx back into evap1.

Currently pumping back down.

 Wednesday, March 25, 2015, 09:38

IG1 = 8.65e-7 Torr

Tapped up evap1 manually to 40A.

Waited ~20min.

Vaccuum stable.

IGP1 = 7.75e-7 Torr.

Initiating auto-ramp.

 Wednesday, April 01, 2015, 15:07

TGHT has reached 520A, 5.82V - YAY!

Will continue to heat overnight and initiate ramp-down/ cooling tomorrow morning.

Slightly shorter time frame to reach max setpoints than normal - possibly due to lack of binder/ skipping packing process.

Great timing before the long weekend 

 Thursday, April 02, 2015, 09:20

Target has been conditioned at max setpoints for 20hours.

Auto-cooling ramp down initiated at 2.0A/min.

 Thursday, April 09, 2015, 16:02

Vented in argon and removed from evap1 tuesday.

Appears as though some discs may be slightly displaced, pictures to follow...

Thursday, October 15, 2015, 15:52

Target container previously sintered with TaC in Evap#2 - Target current at 440A, temp measured at 1900C.  A few tests on the temp measured were done (see Evap#2 elog #251 & 252). 
Note:  This is the new design container with a small back block.

Container is loaded with 245 discs of UC2; measured disc length 7.5 cm

A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down, so the right is open - discs are held on with Ta wire spring.

3 layers of Ta-heat shield is used. 

Target heater will be ramped up to 440A (according to the achieved temperature from Evap#2). 

Ramping rate at 0.1A/min.

Monitor closely on the vacuum around 400A to see if the carbonization process is complete. 

Chamber is currently being pumped down. 

 Friday, October 16, 2015, 10:33

Chamber has pumped down to 2e-6 Torr. 

Stepping up TGHT to 70A/0.23V. 

 Friday, October 16, 2015, 14:55

TGHT stepped up to 70A, pressure went to max 5.7e-5 Torr and it's coming down.

Initated autoramping.  (good vac at 5e-5 Torr, bad at 6.0e-5 Torr)

 Thursday, October 22, 2015, 12:26

TGHT has reached 440A/4.403V and stablized for about 5 hours. 

Pressure started coming down at around 370A which indicated the ending of the carbonization process. 

Currently vacuum is at 5.6e-6 torr. 

Initiated cooling down process at 2A/min.

John Wong wrote:

Thursday, October 15, 2015, 15:52 Target container previously sintered with TaC in Evap#2 - Target current at 440A, temp measured at 1900C.  A few tests on the temp measured were done (see Evap#2 elog #251 & 252).  Note:  This is the new design container with a small back block. Container is loaded with 245 discs of UC2; measured disc length 7.5 cm A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down, so the right is open - discs are held on with Ta wire spring. 3 layers of Ta-heat shield is used.  Target heater will be ramped up to 440A (according to the achieved temperature from Evap#2).  Ramping rate at 0.1A/min. Monitor closely on the vacuum around 400A to see if the carbonization process is complete.  Chamber is currently being pumped down.   Friday, October 16, 2015, 10:33 Chamber has pumped down to 2e-6 Torr.  Stepping up TGHT to 70A/0.23V.   Friday, October 16, 2015, 14:55 TGHT stepped up to 70A, pressure went to max 5.7e-5 Torr and it's coming down. Initated autoramping.  (good vac at 5e-5 Torr, bad at 6.0e-5 Torr)  Thursday, October 22, 2015, 12:26 TGHT has reached 440A/4.403V and stablized for about 5 hours.  Pressure started coming down at around 370A which indicated the ending of the carbonization process.  Currently vacuum is at 5.6e-6 torr.  Initiated cooling down process at 2A/min.

 Monday, October 26, 2015, 16:18

Target vented in argon, taken out and currently in glove box.

Target looks good, last one of the year! 

Endcaps inserted and need to be expanded, Rh foil still needs to be added.

 Thursday, February 18, 2016, 15:34

Target container was previously coated with TaC spray and sintered.

Container is wrapped with 3 layers of Ta-heat shield, including the center block - same method as for sintering TaC coating [new wrapping method-see elog112 eva2].

The target consists of 244 discs of UCx with 7.8cm in length.

A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down, so the right is open

The chamber is currently pumping down.

TGHT will be ramped up to 520A at 0.1A/min

Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac.

 Friday, February 19, 2016, 08:28

IG1 = 4.7e-6 Torr

Tapped up manually to 35A.

Waited ~1hr, vacuum stable

IG1 = 3.8e-6 Torr.

Initiating auto-ramp.

Laura Lambert wrote:

Thursday, February 18, 2016, 15:34 Target container was previously coated with TaC spray and sintered. Container is wrapped with 3 layers of Ta-heat shield, including the center block - same method as for sintering TaC coating [new wrapping method-see elog112 eva2]. The target consists of 244 discs of UCx with 7.8cm in length. A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down, so the right is open The chamber is currently pumping down. TGHT will be ramped up to 520A at 0.1A/min Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac.  Friday, February 19, 2016, 08:28 IG1 = 4.7e-6 Torr Tapped up manually to 35A. Waited ~1hr, vacuum stable IG1 = 3.8e-6 Torr. Initiating auto-ramp.

 Friday, February 26, 2016, 10:26

Target has been heated at 520A for 10 hrs.

Vacuum at 5.3e-6 Torr. 

Initiated cool down at 1A/min. 

Remember to vent with Ar. 

John Wong wrote:

Laura Lambert wrote:  Thursday, February 18, 2016, 15:34 Target container was previously coated with TaC spray and sintered. Container is wrapped with 3 layers of Ta-heat shield, including the center block - same method as for sintering TaC coating [new wrapping method-see elog112 eva2]. The target consists of 244 discs of UCx with 7.8cm in length. A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down, so the right is open The chamber is currently pumping down. TGHT will be ramped up to 520A at 0.1A/min Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac.  Friday, February 19, 2016, 08:28 IG1 = 4.7e-6 Torr Tapped up manually to 35A. Waited ~1hr, vacuum stable IG1 = 3.8e-6 Torr. Initiating auto-ramp.    Friday, February 26, 2016, 10:26 Target has been heated at 520A for 10 hrs. Vacuum at 5.3e-6 Torr.  Initiated cool down at 1A/min.  Remember to vent with Ar.

 Monday, February 29, 2016, 16:15

Vented in Ar.

Target removed from evap1 this morning.

Currently sitting in glovebox.

Weird red discharge on the end of the right side, inside the container [wrt ionizer tube into page] - same side with no endcap during carbonization.

Materials look good, both endcaps inserted.

Rh foil still needs to be implanted.

 Wednesday, March 02, 2016, 10:13

The discoloration appears to be a simple change in the morphology of the TaC coating, future tests would need to be done to confirm this estimation.

This should not effect the container/ target.

See photo attached.

 Wednesday, May 18, 2016, 15:05

Target container was previously coated with TaC spray and sintered.

Container is wrapped with 3 layers of Ta-heat shield, including the center block - new wrapping method-see elog112 evap2

The target consists of 200 discs of UCx with 7.4cm in length [4 packs of 5 + 180 single discs].

A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down.

The right side is open with a TaC coated spring to help hold materials in.

The chamber is currently pumping down.

TGHT will be ramped up to 460A at 0.1A/min [same current used to reach 1900C in evap2 when sintering TaC coating - elog291 evap2]

Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac.

 Thursday, May 19, 2016, 09:25

IG1 = 3.4e-6 Torr

Tapped up manually to 35A

Vacuum stable.

IG1 = 3.5e-6 Torr.

Initiating auto-ramp.

 Wednesday, May 25, 2016, 13:05

Target has been heated at 460A, 4.5V for 5 hrs.

Vacuum at 6.4e-6 Torr. 

Initiated cool down at 1A/min. 

 Friday, May 27, 2016, 11:14

UCx done.

Vented in Ar and put in glove box yesterday.

Looked inside before inserting 2nd endcap - clean view all the way through the materials to the endcap/ not much visible shifting.

Ta coated spring helped hold materials in place.

Slightly darker markings on legs of container on side that was open in evap1.

2nd endcap put in.

Ready for assembly.

 Tuesday, June 30, 2015, 13:28

Target container was previously coated with TaC spray and sintered.

It's is wrapped with 3 layers of Ta-heat shield, including the center block.

The target consists of 221 discs of UCx with 7.3cm in length.

A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down, so the right is open - discs are held on with Ta wire spring.

The chamber is currently pumping down.

TGHT will be ramped up to 520A at 0.1A/min

Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac.

 Tuesday, June 30, 2015, 14:43

IG1 = 1.8e-5 Torr.

Tapped up manually to 30A.

Vacuum stable; IG1 = 1.2e-5 Torr.

Initiating auto-ramp.

 Thursday, July 02, 2015, 08:41

EVAP1 was tripped off due to backflow preventer test this morning.

IG1 - 4.2e-6 Torr.

Tapping back-up manually before re-initiating auto-ramp.

 Thursday, July 02, 2015, 11:49

Tapped up manually to 85A, 0.65V

IG1 = 3.6e-6 Torr.

Initiating auto-ramp.

 Friday, July 03, 2015, 14:47

All water valves look good, flow is good.

WV turned back on, TGHT turned back on. 

Tapped back up manually to 20A.

IG1 = 2.3e-6 Torr

Initiating auto-ramp at 0.1A/min with a max setpoint of 150A over the weekend.

Will continue to ramp up monday.

Approved by Peter Kunz.

Laura Lambert wrote:

Tuesday, June 30, 2015, 13:28 Target container was previously coated with TaC spray and sintered. It's is wrapped with 3 layers of Ta-heat shield, including the center block. The target consists of 221 discs of UCx with 7.3cm in length. A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down, so the right is open - discs are held on with Ta wire spring. The chamber is currently pumping down. TGHT will be ramped up to 520A at 0.1A/min Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac.  Tuesday, June 30, 2015, 14:43 IG1 = 1.8e-5 Torr. Tapped up manually to 30A. Vacuum stable; IG1 = 1.2e-5 Torr. Initiating auto-ramp.  Thursday, July 02, 2015, 08:41 EVAP1 was tripped off due to backflow preventer test this morning. IG1 - 4.2e-6 Torr. Tapping back-up manually before re-initiating auto-ramp.  Thursday, July 02, 2015, 11:49 Tapped up manually to 85A, 0.65V IG1 = 3.6e-6 Torr. Initiating auto-ramp.

 Thursday, July 02, 2015, 12:58

NOTE:  Before venting the EVAP1 chamber, the Ar line must disconnect from Peter's sampling chamber (inside the fumehood) and connect back to the EVAP. 

John Wong wrote:

Laura Lambert wrote:  Tuesday, June 30, 2015, 13:28 Target container was previously coated with TaC spray and sintered. It's is wrapped with 3 layers of Ta-heat shield, including the center block. The target consists of 221 discs of UCx with 7.3cm in length. A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down, so the right is open - discs are held on with Ta wire spring. The chamber is currently pumping down. TGHT will be ramped up to 520A at 0.1A/min Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac.  Tuesday, June 30, 2015, 14:43 IG1 = 1.8e-5 Torr. Tapped up manually to 30A. Vacuum stable; IG1 = 1.2e-5 Torr. Initiating auto-ramp.  Thursday, July 02, 2015, 08:41 EVAP1 was tripped off due to backflow preventer test this morning. IG1 - 4.2e-6 Torr. Tapping back-up manually before re-initiating auto-ramp.  Thursday, July 02, 2015, 11:49 Tapped up manually to 85A, 0.65V IG1 = 3.6e-6 Torr. Initiating auto-ramp.    Thursday, July 02, 2015, 12:58 NOTE:  Before venting the EVAP1 chamber, the Ar line must disconnect from Peter's sampling chamber (inside the fumehood) and connect back to the EVAP.

 Friday, July 03, 2015, 13:42

water valve tripped off at ~1pm, which subsequently tripped off the TGHT [see photo]

currently trying to figure out what caused this to occur before re-starting....

 Friday, July 03, 2015, 14:47

All water valves look good, flow is good.

WV turned back on, TGHT turned back on. 

Tapped back up manually to 20A.

IG1 = 2.3e-6 Torr

Initiating auto-ramp at 0.1A/min with a max setpoint of 150A over the weekend.

Will continue to ramp up monday.

Approved by Peter Kunz.

 Monday, July 06, 2015, 09:29

TGHT reached 150A 1.5hrs ago.

Vacuum stable.

IG1 = 2.7e-5 Torr.

Re-starting auto-ramp at 0.1A/min with a max setpoint of 520A.

Laura Lambert wrote:

John Wong wrote: Laura Lambert wrote:  Tuesday, June 30, 2015, 13:28 Target container was previously coated with TaC spray and sintered. It's is wrapped with 3 layers of Ta-heat shield, including the center block. The target consists of 221 discs of UCx with 7.5cm in length. A regular TaC coated endcap is inserted left, wrt the ionizer tube pointing down, so the right is open - discs are held on with Ta wire spring. The chamber is currently pumping down. TGHT will be ramped up to 520A at 0.1A/min Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac.  Tuesday, June 30, 2015, 14:43 IG1 = 1.8e-5 Torr. Tapped up manually to 30A. Vacuum stable; IG1 = 1.2e-5 Torr. Initiating auto-ramp.  Thursday, July 02, 2015, 08:41 EVAP1 was tripped off due to backflow preventer test this morning. IG1 - 4.2e-6 Torr. Tapping back-up manually before re-initiating auto-ramp.  Thursday, July 02, 2015, 11:49 Tapped up manually to 85A, 0.65V IG1 = 3.6e-6 Torr. Initiating auto-ramp.    Thursday, July 02, 2015, 12:58 NOTE:  Before venting the EVAP1 chamber, the Ar line must disconnect from Peter's sampling chamber (inside the fumehood) and connect back to the EVAP.     Friday, July 03, 2015, 13:42 water valve tripped off at ~1pm, which subsequently tripped off the TGHT [see photo] currently trying to figure out what caused this to occur before re-starting....  Friday, July 03, 2015, 14:47 All water valves look good, flow is good. WV turned back on, TGHT turned back on.  Tapped back up manually to 20A. IG1 = 2.3e-6 Torr Initiating auto-ramp at 0.1A/min with a max setpoint of 150A over the weekend. Will continue to ramp up monday.   Approved by Peter Kunz.  Monday, July 06, 2015, 09:29 TGHT reached 150A 1.5hrs ago. Vacuum stable. IG1 = 2.7e-5 Torr. Re-starting auto-ramp at 0.1A/min with a max setpoint of 520A.

 Wednesday, July 08, 2015, 10:44

The carbonization process is complete; chamber vacuum is stabilizing at 9.5e-6 Torr. 

Currently TGHT is at 430A.  Increased TGHT ramping rate to 1A/min.  Target should be at max current (520A) in 1.5 hours, so TGHT can be ramped down around 4:30pm today. 

 Wednesday, July 08, 2015, 16:36

TGHT at 520A/5.884V for over 4 hours.  Pressure coming down, currently at 1.42e-5 Torr. 

Initiated cooling at -2A/min. 

Chamber can be vented in Ar tomorrow and the target will be inspected.

Thursday, July 09, 2015, 17:08  

The target was taken out from the evaporator and inspected. 

Some "burnt" marks on the ionization legs can be observed and also the centre support leg is bent.  (see photos#1)

Not sure if the centre leg came in bent after machining or it happened during the carbonization process??  Do not have photos of the container before the process to compare.  

A few things to note…  During the process, the power supply did tripped off twice due to the cooling water valve shut off. (see photo#2).  An assumption is that sudden cool down of the hot target might have caused the quenching effect. 

No other visible damage.  

End caps are inserted and ready for assembly.

Link to photos:  https://www.dropbox.com/sh/c1ake0fu4x7lckc/AAD0F8TVRrpCbbHquEvSkyYIa?dl=0

 Friday, October 17, 2014, 11:47

Target container was previously coated with TaC spray and sintered.

It's is wrapped with 3 layers of Ta-heat shield, including the center block.

The target consists of 255 discs of UCx with 10.5cm in length.

A regular TaC coated endcap is inserted right, wrt the ionizer tube pointing down, so the left is open with a removable half-cap to allow out-gassing.

The chamber was pumped down overnight.

TGHT will be ramped up to 520A - keep heating the current for 4-5 hours.

Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac.

Auto ramp at 0.1A/min.

 Friday, October 17, 2014, 13:25

IG1 = 2.6e-6 Torr

Manually stepped up to 35A

Waited ~1hr15

IG1 = 4.2e-6 Torr

Initiating auto-ramp.

Laura Lambert wrote:

Friday, October 17, 2014, 11:47 Target container was previously coated with TaC spray and sintered. It's is wrapped with 3 layers of Ta-heat shield, including the center block. The target consists of 255 discs of UCx with 10.5cm in length. A regular TaC coated endcap is inserted right, wrt the ionizer tube pointing down, so the left is open with a removable half-cap to allow out-gassing. The chamber was pumped down overnight. TGHT will be ramped up to 520A - keep heating the current for 4-5 hours. Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac. Auto ramp at 0.1A/min.  Friday, October 17, 2014, 13:25 IG1 = 2.6e-6 Torr Manually stepped up to 35A Waited ~1hr15 IG1 = 4.2e-6 Torr Initiating auto-ramp.

 Monday, October 20, 2014, 14:10

There were two big power bumps occurred on Saturday Oct 18 and wiped all the IOC/PLC on the Evaporators.   All the system, including TGHT/pumps/EPICS/Alarm handlers were found off.  The ion gauge was turned on this morning and showed the pressure was around 16mTorr. (see attachment).

The pump has been turned back on; pressure is currently at 3.5e-6 Torr.

Ramping up TGHT...

 Monday, November 03, 2014, 12:05

TGHT has reached to 580A and the target has conditioned at that current for about 3 days. 

Cooling down at 2A/min.

 Wednesday, November 05, 2014, 16:40

UCx conditioning complete.

Target is now in the Ar-glove box.  End caps are inserted but need to be expanded.

Need to insert Re foil prior to assembly.

John Wong wrote:

Laura Lambert wrote:  Friday, October 17, 2014, 11:47 Target container was previously coated with TaC spray and sintered. It's is wrapped with 3 layers of Ta-heat shield, including the center block. The target consists of 255 discs of UCx with 10.5cm in length. A regular TaC coated endcap is inserted right, wrt the ionizer tube pointing down, so the left is open with a removable half-cap to allow out-gassing. The chamber was pumped down overnight. TGHT will be ramped up to 520A - keep heating the current for 4-5 hours. Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac. Auto ramp at 0.1A/min.  Friday, October 17, 2014, 13:25 IG1 = 2.6e-6 Torr Manually stepped up to 35A Waited ~1hr15 IG1 = 4.2e-6 Torr Initiating auto-ramp.    Monday, October 20, 2014, 14:10 There were two big power bumps occurred on Saturday Oct 18 and wiped all the IOC/PLC on the Evaporators.   All the system, including TGHT/pumps/EPICS/Alarm handlers were found off.  The ion gauge was turned on this morning and showed the pressure was around 16mTorr. (see attachment). The pump has been turned back on; pressure is currently at 3.5e-6 Torr. Ramping up TGHT...  Monday, November 03, 2014, 12:05 TGHT has reached to 580A and the target has conditioned at that current for about 3 days.  Cooling down at 2A/min.  Wednesday, November 05, 2014, 16:40 UCx conditioning complete. Target is now in the Ar-glove box.  End caps are inserted but need to be expanded. Need to insert Re foil prior to assembly.

 Monday, November 10, 2014, 13:48

UCx was being assembled, but as one of the endcaps was being expanded, the target container broke [friday nov 7th].

attempting to recover the materials and re-load into a new container now...

 Monday, November 10, 2014, 15:52

new target materials weight total [incl graphite] = 23.368g

(33.994g of materials taken out of broken target)

 Friday, January 19, 2018, 12:29

Circles from cast 1 were used, the same as the last round of 1stepUCx [see elog i.d. 164]

A 14mm punch was used to punch out circles from the cast.

35 circles were packed into a graphite sample container.

35 x UO2/C circles = 5.69 g

Graphite container = 6.84 g

Graphite container is placed inside a target boat.

Boat previously coated with TaC and sintered.

Ta-target boat is wrapped with 3-layers of heat shield and installed in Evap1.

Chamber currently pumping down.

Marla Cervantes wrote:

Friday, January 19, 2018, 12:29 Circles from cast 1 were used, the same as the last round of 1stepUCx [see elog i.d. 164] A 14mm punch was used to punch out circles from the cast. 35 circles were packed into a graphite sample container. 35 x UO2/C circles = 5.69 g Graphite container = 6.84 g Graphite container is placed inside a target boat. Boat previously coated with TaC and sintered. Ta-target boat is wrapped with 3-layers of heat shield and installed in Evap1. Chamber currently pumping down.

 Monday, January 22, 2018, 15:48

A power outage on Sunday tripped off EVAP1.

Marla Cervantes wrote:

Marla Cervantes wrote:  Friday, January 19, 2018, 12:29 Circles from cast 1 were used, the same as the last round of 1stepUCx [see elog i.d. 164] A 14mm punch was used to punch out circles from the cast. 35 circles were packed into a graphite sample container. 35 x UO2/C circles = 5.69 g Graphite container = 6.84 g Graphite container is placed inside a target boat. Boat previously coated with TaC and sintered. Ta-target boat is wrapped with 3-layers of heat shield and installed in Evap1. Chamber currently pumping down.    Monday, January 22, 2018, 9:00 A power outage on Sunday tripped off EVAP1.

 Monday, January 22, 2018, 10:00

Chamber pumping down.

Water flow turned on.

Monday, January 22, 2018, 13:30

IGP1 = 8e-6 Torr

Tapped up entire process manually to 520A in 45 min

TGHT = 520 A, 6.08 V 

Vacuum coming down indicating carbonization process complete

Will remain at max setpoint overnight.

Marla Cervantes wrote:

Marla Cervantes wrote: Marla Cervantes wrote:  Friday, January 19, 2018, 12:29 Circles from cast 1 were used, the same as the last round of 1stepUCx [see elog i.d. 164] A 14mm punch was used to punch out circles from the cast. 35 circles were packed into a graphite sample container. 35 x UO2/C circles = 5.69 g Graphite container = 6.84 g Graphite container is placed inside a target boat. Boat previously coated with TaC and sintered. Ta-target boat is wrapped with 3-layers of heat shield and installed in Evap1. Chamber currently pumping down.    Monday, January 22, 2018, 9:00 A power outage on Sunday tripped off EVAP1.  Monday, January 22, 2018, 10:00 Chamber pumping down. Water flow turned on. Monday, January 22, 2018, 13:30 IGP1 = 8e-6 Torr Tapped up entire process manually to 520A in 45 min TGHT = 520 A, 6.08 V  Vacuum coming down indicating carbonization process complete Will remain at max setpoint overnight.

 Tuesday, January 23, 2018, 9:30

Initiating auto-cool at 2 A/min

 Tuesday, January 23, 2018, 16:00

 EVAP1 was not vented, Ar tank has low level, Ar tank will be replaced.

Wednesday, January 24, 2018, 11:37

 EVAP1 was vented very carefully using the Ar remaining in the Ar tank.

Ar tank remaining gas: ~8 psi.

Wednesday, January 24, 2018, 15:42 

UCx was transferred to glove box.

Final mass 4.501 g

 Thursday, November 23, 2017, 13:34

Circles from cast 1 were used, the same as the last round of 1stepUCx [see elog i.d. 164]

A 14mm punch was used to punch out circles from the cast.

35 circles were packed into a graphite sample container.

35 x UO2/C circles = 5.75 g

Graphite container = 5.38 g

Graphite container is placed inside a target boat.

Boat previously coated with TaC and sintered.

Ta-target boat is wrapped with 3-layers of heat shield and installed in Evap1.

Chamber currently pumping down.

 Friday, November 24, 2017, 12:48

IGP1=1.3e-6 Torr

TGHT = 520A, 4.98V 

Vacuum went down indicating carbonization.

Will remain at max setpoint for the weekend.

 Monday, November 27, 2017, 09:58

IG1 = 2.6e-6 Torr

TGHT = 520A, 5.1V

Carbonization complete in 3 hrs and 30 min.

Initiating auto-cool at 2.0A/min

 Wednesday, November 27, 2017, 13:10

 IEVAP was vented in argon and sample removed/transferred to glove box on Friday.

Laura Lambert wrote:

Marla Cervantes wrote:  Wednesday, January 10, 2018, 14:44 Circles from cast 1 were used, the same as the last round of 1stepUCx [see elog i.d. 164] A 14mm punch was used to punch out circles from the cast. 35 circles were packed into a graphite sample container. 35 x UO2/C circles = 5.75 g Graphite container = 5.38 g Graphite container is placed inside a target boat. Boat previously coated with TaC and sintered. Ta-target boat is wrapped with 3-layers of heat shield and installed in Evap1. Chamber currently pumping down.  Friday, January 12, 2018, 07:43 IGP1 = 0.0266 Torr TGHT = 520A, 5.92V Voltage has been climbing consistently since it has reached it's max setpoint, gone up ~0.8V in ~18hrs Carbonization complete. Initiating auto-cool at 2.0A/min Will update later with more information on this process.  Friday, January 12, 2018, 09:47 Turned the turbo pump back on, to ensure safe cooling.

 Monday, January 15, 2018, 10:00

Vented with Argon and removed from evap1

NB: The initial mass of the UO2/C discs was 5.9 g

       The final mass of the UCx discs was 4.614 g

 Monday, January 29, 2018, 09:26

35 circles of 14 mm diameter were packed into a graphite sample container.

35 x UO2/C circles = 4.94 g

Graphite container = 5.03 g

Graphite tube is placed inside a target boat.

Boat previously coated with TaC and sintered.

Ta-target boat is wrapped with 3 new Ta foils for heat shielding and the boat was installed in Evap1.

Chamber currently pumping down.

Marla Cervantes wrote:

Monday, January 29, 2018, 09:26 35 circles of 14 mm diameter were packed into a graphite sample container. 35 x UO2/C circles = 4.94 g Graphite container = 5.03 g Graphite tube is placed inside a target boat. Boat previously coated with TaC and sintered. Ta-target boat is wrapped with 3 new Ta foils for heat shielding and the boat was installed in Evap1. Chamber currently pumping down.

 Monday, January 29, 2018, 11:06

A power outage around 10 am tripped off EVAP1.

Marla Cervantes wrote:

Marla Cervantes wrote:  Monday, January 29, 2018, 09:26 35 circles of 14 mm diameter were packed into a graphite sample container. 35 x UO2/C circles = 4.94 g Graphite container = 5.03 g Graphite tube is placed inside a target boat. Boat previously coated with TaC and sintered. Ta-target boat is wrapped with 3 new Ta foils for heat shielding and the boat was installed in Evap1. Chamber currently pumping down.    Monday, January 29, 2018, 11:06 A power outage around 10 am tripped off EVAP1.

 Monday, January 29, 2018, 14:22

Water flow turned on.

Chamber set to pumping down. 

Marla Cervantes wrote:

Marla Cervantes wrote: Marla Cervantes wrote:  Monday, January 29, 2018, 09:26 35 circles of 14 mm diameter were packed into a graphite sample container. 35 x UO2/C circles = 4.94 g Graphite container = 5.03 g Graphite tube is placed inside a target boat. Boat previously coated with TaC and sintered. Ta-target boat is wrapped with 3 new Ta foils for heat shielding and the boat was installed in Evap1. Chamber currently pumping down.    Monday, January 29, 2018, 11:06 A power outage around 10 am tripped off EVAP1.  Monday, January 29, 2018, 14:22 Water flow turned on. Chamber set to pumping down.

 Tuesday, January 30, 2018, 16:06

Initial IGP1 = 9.4x10e-7 Torr

Tapped up entire process manually to 520A in 32 min

TGHT = 520 A, 5.45 V

Vacuum coming down indicating carbonization process complete 

Will remain at max setpoint for 4 hrs to ensure full carbonization before cooling down.

 Tuesday, January 30, 2018, 18:40

 Initiating auto-cool at 2.0 A/min 

 Wednesday, January 31, 2018, 14:00

 Thursday, February 08, 2018, 14:50

35 circles from cast#2 of 14 mm diameter were packed into a graphite sample container.

35 x UO2/C circles = 4.76 g

Graphite container = 5.3 g

Graphite tube is placed inside a target boat.

Boat previously coated with TaC and sintered.

Ta-target boat is wrapped with 3 new Ta foils for heat shielding and the boat was installed in Evap1.

Chamber currently pumping down.

 Friday, February 09, 2018, 10:40

Initial IGP1 = 4.54e-7 Torr

Tapped up entire process manually to 520A in 25 min

TGHT = 520 A, 5.49 V

Vacuum coming down indicating carbonization process complete.  

Current suddenly tripped off from 520 A to 0 A.

There was not a power outage.

There was good vacuum.

Water cooling did not trip off 

Marla Cervantes wrote:

Thursday, February 08, 2018, 14:50 35 circles from cast#2 of 14 mm diameter were packed into a graphite sample container. 35 x UO2/C circles = 4.76 g Graphite container = 5.3 g Graphite tube is placed inside a target boat. Boat previously coated with TaC and sintered. Ta-target boat is wrapped with 3 new Ta foils for heat shielding and the boat was installed in Evap1. Chamber currently pumping down.  Friday, February 09, 2018, 10:40 Initial IGP1 = 4.54e-7 Torr Tapped up entire process manually to 520A in 25 min TGHT = 520 A, 5.49 V Vacuum coming down indicating carbonization process complete.   Current suddenly tripped off from 520 A to 0 A. There was not a power outage. There was good vacuum. Water cooling did not trip off

 Friday, February 09, 2018, 16:49

The power supply was tested and its working normally.

Apparently a glitch on EPICS caused the tripped off.

Marla Cervantes wrote:

Marla Cervantes wrote:  Thursday, February 08, 2018, 14:50 35 circles from cast#2 of 14 mm diameter were packed into a graphite sample container. 35 x UO2/C circles = 4.76 g Graphite container = 5.3 g Graphite tube is placed inside a target boat. Boat previously coated with TaC and sintered. Ta-target boat is wrapped with 3 new Ta foils for heat shielding and the boat was installed in Evap1. Chamber currently pumping down.  Friday, February 09, 2018, 10:40 Initial IGP1 = 4.54e-7 Torr Tapped up entire process manually to 520A in 25 min TGHT = 520 A, 5.49 V Vacuum coming down indicating carbonization process complete.   Current suddenly tripped off from 520 A to 0 A. There was not a power outage. There was good vacuum. Water cooling did not trip off     Friday, February 09, 2018, 16:49 The power supply was tested and its working normally. Apparently a glitch on EPICS caused the tripped off.

 Friday, February 09, 2018, 17:00

Target remained in EVAP1 for 2 hours at 0 A to ensure cooling.

EVAP1 was vented with Ar and the target was removed from EVAP1.

Graphite container seems unbroken.

Ta boat looks unbroken.

 Monday, March 12, 2018, 9:13

35 circles from cast#2 of 14 mm diameter were packed into a graphite sample container.

35 x UO2/C circles = 5.21 g

Graphite container = 6.85 g

Graphite tube is placed inside a target boat.

Boat previously coated with TaC and sintered.

Ta-target boat is wrapped with 3 Ta foils for heat shielding and the boat was installed in Evap1.

Chamber currently pumping down.

 Monday, March 12, 2018, 13:57

Initial IGP1 = 4.79e-7 Torr

Tapped up entire process manually to 520A in 30 min

TGHT = 520 A, 5.32 V

Vacuum coming down indicating carbonization process complete.  

Will remain at max setpoint for 1 hrs to ensure full carbonization before cooling down.

 Monday, March 12, 2018, 14:57 

Cooling down rate used 3 A/10s.

 Tuesday, March 13, 2018, 18:22

Vented with Ar and removed from EVAP1

Friday, July 04, 2014, 10:13

Target boat contains 4 set of samples.  Each sample consists of 5pack ThO2/Nb.  (see photos).

The container is wrapped with 3 layers of heat shield. 

TGHT will be ramped up to 520A at 0.1A/min.

Chamber has been pumped over night, pressure at 4.20e-6 Torr.

The purpose of this test:

1.  Will the Ta- target boat survive at that current?

2.  How will ThO2 sintered?  Shrinkage? Grain-growth? mass loss? density? SEM will be done later.

3.  How will the pressure behave at the max operating temperature (or current)?

  Friday, July 04, 2014, 12:29

Stepped up TGHT to 40A,  Vac went to max at 3.5e-5 Torr and is coming down.

Auto-ramping initiated. 

 Tuesday, August 19, 2014, 10:20

Sample was successfully sinterred to 520A. 

SEM on raw, treated powder, and sintered samples were perform.  Pressure vs current plot can also be found. (see attachments)

More information can be found here:

https://www.dropbox.com/sh/fj78m7tyy7mj99p/AABfm-fQMeoaWhf6HjT8Vzn1a

John Wong wrote:

Friday, July 04, 2014, 10:13 Target boat contains 4 set of samples.  Each sample consists of 5pack ThO2/Nb.  (see photos). The container is wrapped with 3 layers of heat shield.  TGHT will be ramped up to 520A at 0.1A/min. Chamber has been pumped over night, pressure at 4.20e-6 Torr. The purpose of this test: 1.  Will the Ta- target boat survive at that current? 2.  How will ThO2 sintered?  Shrinkage? Grain-growth? mass loss? density? SEM will be done later. 3.  How will the pressure behave at the max operating temperature (or current)?   Friday, July 04, 2014, 12:29 Stepped up TGHT to 40A,  Vac went to max at 3.5e-5 Torr and is coming down. Auto-ramping initiated.

Wednesday, July 09, 2014, 13:55

TGHT reached 520A tuesday morning. [see attached archive screenshot]

Initiated auto-cool at 1.0A/min tuesday afternoon.

Vented in air and took samples out of EVAP1 wednesday morning. [see attached sample photo]

 Wednesday, August 23, 2017, 15:41

2 rounds of UO2/C were cast onto a graphite sheet in the fume hood and let dry.

For this round of samples, circles from cast 1 were used

Graphite powder used = 5.16g

A 14mm punch was used to punch out circles from a 16mm wide strip.

35 circles were packed into a graphite sample container.

graphite container [no endcap] = 3.37g

35 x UO2/C circles = 4.76g

graphite container+smpls = 8.13g

container+smpls+endcap = 10.08g

Graphite tube is placed inside a target boat.

Boat previously coated with TaC and sintered - 1st use of newly sintered boat.

Ta-target boat is wrapped with 3-layers of heat shield and installed in Evap1.

Chamber currently pumping down.

 Friday, August 25, 2017, 09:59

IG1 = 3.45e-6 Torr.

Stepped up manually to 80A.

Vacuum stable.

IG1 = 3.0e-5 Torr.

Initiating auto-ramp.

Target boat will be ramped up to 520A at the rate of 0.1A/min.

Vacuum limit stop at 1.0e-4 Torr, backing off at 5.0e-4 Torr.

 Monday, August 28, 2017, 08:09

IG1 = 6.3e-6 Torr

TGHT = 455A, 4.65V

Vacuum stable.

Increasing ramping rate to 0.2A/min.

 Monday, August 28, 2017, 08:53

IG1 = 7.3e-6 Torr

TGHT = 465A, 4.75V

Vacuum stable.

Increasing ramping rate to 0.5A/min.

 Monday, August 28, 2017, 13:17

IG1 = 1.32e-5 Torr

TGHT = 520A, 5.44V

Vacuum still fairly high and not dropping very fast indicating carbonization incomplete.

Increasing max setpoint to 530A and restarting auto-ramp.

 Monday, August 28, 2017, 15:13

IG1 = 1.32e-5 Torr

TGHT = 530A, 5.58V

Vacuum still high, wavering up and down/ not dropping - carbonization remains incomplete.

Increasing max setpoint to 540A and restarting auto-ramp.

 Tuesday, August 29, 2017, 09:28

IG1 = 3.72e-6 Torr

TGHT = 540A, 5.66V

Carbonization complete.

Initiating auto-cool at 2.0A/min

 Tuesday, November 14, 2017, 16:12

Circles from cast 1 were used, the same as the last round of 1stepUCx [see elog i.d. 164]

A 14mm punch was used to punch out circles from the cast.

35 circles were packed into a graphite sample container.

35 x UO2/C circles = 5.43g

Graphite tube is placed inside a target boat.

Boat previously coated with TaC and sintered.

Ta-target boat is wrapped with 3-layers of heat shield and installed in Evap1.

Chamber currently pumping down.

 Wednesday, November 15, 2017, 08:53

IGP1 = 1.6e-6 Torr

Tapping up manually...

 Wednesday, November 15, 2017, 11:59

IGP1 = 5.0e-5 Torr

Tapped up entire process manually to 520A in 3hrs!!!

TGHT = 520A, 4.98V

Vacuum coming down nicely indicating carbonization process complete 

Will remain at max setpoint for 4hrs to ensure full carbonization before cooling down later this afternoon.

 Wednesday, November 15, 2017, 15:16

IG1 = 8.65e-6 Torr

TGHT = 520A, 4.92V

Carbonization complete.

Initiating auto-cool at 2.0A/min

 Monday, November 20, 2017, 13:28

Evap1 was vented in argon and sample removed/ transfered to glove box on friday.

Discs look good, slightly lighter grayer compared to production UCx discs after second cast but before final carbonization.

Material seems to adhere to graphite backing foil well, no flakes coming off from just moving discs around.

Weight of 35 carbonized discs = 4.387g

Weight loss = 5.43g - 4.387g = 1.043g

 Wednesday, March 28, 2018, 11:35

D-shaped discs were cut from cast 2, the same as the last sample of 1stepUCx [see elog i.d. 197]

A 13mm punch was used to punch out discs from pre-cut strips using the old method.

The target consists of 195 discs with 8.1cm in length - all single discs, no packs.

195 x UO2/C discs = 19.79g

Graphite insert is placed inside a target boat with both endcaps on.

Boat previously coated with TaC and sintered.

Ta-target boat is wrapped with 3-layers of heat shield and installed in evap1 yesterday afternoon.

Chamber pumped down overnight.

 Wednesday, March 28, 2018, 13:33

IGP1 = 4.03e-7 Torr

Tapped up TGHT manually to 80A, 0.83V - waited 50min, vacuum started to drop/stabilize.

Continued to tap up manually to 430A, 4.22V

Started out slow with a rate of ~10A/5min, and slowly increased to a rate of ~10A/min as vacuum stabilized, slowing down again when reaching carbonization outgassing.

Auto ramp at 0.2A/min from 430A-520A.

Thursday, March 29, 2018, 10:04

Reached 520A around 2am.

TGHT = 520A, 5.13V

IGP1 = 1.74e-6 Torr

Initiated auto-cool this morning at a rate of 1.0A/min.

Laura Lambert wrote:

Wednesday, March 28, 2018, 11:35 D-shaped discs were cut from cast 2, the same as the last sample of 1stepUCx [see elog i.d. 197] A 13mm punch was used to punch out discs from pre-cut strips using the old method. The target consists of 195 discs with 8.1cm in length - all single discs, no packs. 195 x UO2/C discs = 19.79g Graphite insert is placed inside a target boat with both endcaps on. Boat previously coated with TaC and sintered. Ta-target boat is wrapped with 3-layers of heat shield and installed in evap1 yesterday afternoon. Chamber pumped down overnight.  Wednesday, March 28, 2018, 13:33 IGP1 = 4.03e-7 Torr Tapped up TGHT manually to 80A, 0.83V - waited 50min, vacuum started to drop/stabilize. Continued to tap up manually to 430A, 4.22V Started out slow with a rate of ~10A/5min, and slowly increased to a rate of ~10A/min as vacuum stabilized, slowing down again when reaching carbonization outgassing. Auto ramp at 0.2A/min from 430A-520A. Thursday, March 29, 2018, 10:04 Reached 520A around 2am. TGHT = 520A, 5.13V IGP1 = 1.74e-6 Torr Initiated auto-cool this morning at a rate of 1.0A/min.

 Monday, April 09, 2018, 16:00

ISAC controls performed a PLC switch over compromising the nuclear ventilation controls WITHOUT NOTIFYING ME  

This is the 2nd time in a month this has happened without being notified.

Evap1 has therefore tripped.

During this switch there was a problem which caused the turn over to take even longer.

Sat here tapping reset until nuclear ventilation was 'back on'.

Vacuum proceeded to drop once the tests were complete, then started to spike again, nuc vent remained not ok after tests were done nuc vent ok.

Laura Lambert wrote:

Laura Lambert wrote:  Wednesday, March 28, 2018, 11:35 D-shaped discs were cut from cast 2, the same as the last sample of 1stepUCx [see elog i.d. 197] A 13mm punch was used to punch out discs from pre-cut strips using the old method. The target consists of 195 discs with 8.1cm in length - all single discs, no packs. 195 x UO2/C discs = 19.79g Graphite insert is placed inside a target boat with both endcaps on. Boat previously coated with TaC and sintered. Ta-target boat is wrapped with 3-layers of heat shield and installed in evap1 yesterday afternoon. Chamber pumped down overnight.  Wednesday, March 28, 2018, 13:33 IGP1 = 4.03e-7 Torr Tapped up TGHT manually to 80A, 0.83V - waited 50min, vacuum started to drop/stabilize. Continued to tap up manually to 430A, 4.22V Started out slow with a rate of ~10A/5min, and slowly increased to a rate of ~10A/min as vacuum stabilized, slowing down again when reaching carbonization outgassing. Auto ramp at 0.2A/min from 430A-520A. Thursday, March 29, 2018, 10:04 Reached 520A around 2am. TGHT = 520A, 5.13V IGP1 = 1.74e-6 Torr Initiated auto-cool this morning at a rate of 1.0A/min.    Monday, April 09, 2018, 16:00 ISAC controls performed a PLC switch over compromising the nuclear ventilation controls WITHOUT NOTIFYING ME   This is the 2nd time in a month this has happened without being notified. Evap1 has therefore tripped. During this switch there was a problem which caused the turn over to take even longer. Sat here tapping reset until nuclear ventilation was 'back on'. Vacuum proceeded to drop once the tests were complete, then started to spike again, nuc vent remained not ok after tests were done nuc vent ok.

 Monday, April 09, 2018, 16:52

Turns out I wasn't on a list of ppl who need to know about this test when I should be

They also didn't reset the alarms locally outside the hot lab so nuc vent remained not ok until this was reset.

IGP1 reached 0.027 Torr before nuc vent was ok and pumps were able to be turned back on 

Pumps back on IGP1 = 1.86e-5 Torr and still pumping down

Laura Lambert wrote:

Laura Lambert wrote: Laura Lambert wrote:  Wednesday, March 28, 2018, 11:35 D-shaped discs were cut from cast 2, the same as the last sample of 1stepUCx [see elog i.d. 197] A 13mm punch was used to punch out discs from pre-cut strips using the old method. The target consists of 195 discs with 8.1cm in length - all single discs, no packs. 195 x UO2/C discs = 19.79g Graphite insert is placed inside a target boat with both endcaps on. Boat previously coated with TaC and sintered. Ta-target boat is wrapped with 3-layers of heat shield and installed in evap1 yesterday afternoon. Chamber pumped down overnight.  Wednesday, March 28, 2018, 13:33 IGP1 = 4.03e-7 Torr Tapped up TGHT manually to 80A, 0.83V - waited 50min, vacuum started to drop/stabilize. Continued to tap up manually to 430A, 4.22V Started out slow with a rate of ~10A/5min, and slowly increased to a rate of ~10A/min as vacuum stabilized, slowing down again when reaching carbonization outgassing. Auto ramp at 0.2A/min from 430A-520A. Thursday, March 29, 2018, 10:04 Reached 520A around 2am. TGHT = 520A, 5.13V IGP1 = 1.74e-6 Torr Initiated auto-cool this morning at a rate of 1.0A/min.    Monday, April 09, 2018, 16:00 ISAC controls performed a PLC switch over compromising the nuclear ventilation controls WITHOUT NOTIFYING ME   This is the 2nd time in a month this has happened without being notified. Evap1 has therefore tripped. During this switch there was a problem which caused the turn over to take even longer. Sat here tapping reset until nuclear ventilation was 'back on'. Vacuum proceeded to drop once the tests were complete, then started to spike again, nuc vent remained not ok after tests were done nuc vent ok.    Monday, April 09, 2018, 16:52 Turns out I wasn't on a list of ppl who need to know about this test when I should be They also didn't reset the alarms locally outside the hot lab so nuc vent remained not ok until this was reset. IGP1 reached 0.027 Torr before nuc vent was ok and pumps were able to be turned back on  Pumps back on IGP1 = 1.86e-5 Torr and still pumping down

 Tuesday, April 10, 2018, 14:46

Glove box fixed!

Vented in Argon and transferred to glove box.

Graphite insert has moved to within 1mm of the end of the left side of the boat.

This could have happened during removal from evap1, hard to tell.

Either way, clearly a looser fit of the graphite insert in the boat indicating possible shrinkage of graphite insert.

 Tuesday, April 17, 2018, 10:30

UO2/C green was prepared April 12th, 2018

The cast peeled off the glass nicely April 13th, 2018

Initial UO2 powder used = 50.56g (Inventory R-01032A, UO2 + bottle = 626.28g before use)

Graphite powder used = 10.38g

Green cast dried UO2/C + organic mass = 61.40g 

The green was rolled up and wrapped in a piece of graphite sheet.

The Ta-target boat was wrapped with 3-layers of heat shield [1 reused, 2 new] and installed in evap1 yesterday.

Chamber pumped down overnight.

IGP1 = 8.4e-7 Torr

Tapped up to 35A, 0.46V

Waited ~135min, vacuum stable.

IGP1 = 1.6e-5 Torr

Initiating auto-ramp at 0.2A/min

Target boat will be ramped up to 520A.

Vacuum limit stop at 3.0e-4 Torr, backing off at 6.0e-4 Torr.

 Wednesday, April 18, 2018, 09:21

IGP1 = 9.6e-6 Torr

TGHT = 245A, 2.10V

Vacuum stable, increasing ramping rate to 0.5A/min.

 Thursday, April 19, 2018, 08:35

IGP1 = 3.21e-6 Torr

Materials have finished carbonizing.

TGHT = 520A, 4.97V

Evap1 has remained at max setpoints for ~6.5hrs

Initiating auto-cool at 1.0A/min

 Thursday, May 10, 2018, 10:33

Materials were vented in Ar and transferred to glove box on April 20th

Thursday, January 23, 2014, 16:26 

 A new target boat was sprayed with TaC coating and let dry, the coating appeared slightly bubbly once dried [see attached photos].

The target boat was wrapped with 3-layers of Ta-heat shield.

The boat was installed in Evap#1, chamber is currently being pumped down overnight.

Laura Lambert wrote:

Thursday, January 23, 2014, 16:26   A new target boat was sprayed with TaC coating and let dry, the coating appeared slightly bubbly once dried [see attached photos]. The target boat was wrapped with 3-layers of Ta-heat shield. The boat was installed in Evap#1, chamber is currently being pumped down overnight.

 Friday, January 24, 2014, 14:42

Chamber was pumped down to 5.9e-6 Torr overnight.

TGHT was stepped up to 35A.

Waited 20min, vacuum consistently stable, auto-ramp initiated at 0.2A/min and max setpoint to 580A.

Good vacuum: 5e-5 Torr. Bad vacuum: 6e-5 Torr.

Laura Lambert wrote:

Laura Lambert wrote: Thursday, January 23, 2014, 16:26   A new target boat was sprayed with TaC coating and let dry, the coating appeared slightly bubbly once dried [see attached photos]. The target boat was wrapped with 3-layers of Ta-heat shield. The boat was installed in Evap#1, chamber is currently being pumped down overnight.    Friday, January 24, 2014, 14:42 Chamber was pumped down to 5.9e-6 Torr overnight. TGHT was stepped up to 35A. Waited 20min, vacuum consistently stable, auto-ramp initiated at 0.2A/min and max setpoint to 580A. Good vacuum: 5e-5 Torr. Bad vacuum: 6e-5 Torr.

 Monday, January 27, 2014, 11:01

TGHT reached 580A over the weekend.

TGHT auto-cooldown initiated at 2.0A/min.

 Tuesday, January 28, 2014, 15:51

Chamber cooled down overnight, vented and opened up this morning.

Target boat looks good! [See attached photos]

 Wednesday, February 05, 2014, 14:13

1st attempt:

UO2/C green was prepared on Feb 4, 2014 [tues]. The slurry was cast on a piece of glass coated with WD40.

The cast was let dry until Feb 5, 2014 [wed] - the cast was cracked and too much WD40 was used because there were oil patches [see attached photo: cast1]; however, the cast peeled off the glass very nicely.

2nd attempt:

Due to cracked and oil patches, decided to re-mill and try again.

Scrapped off cast, added the additional compositions:

1g PEG400, 1g Glycerol, 14g 5% PVA, 2mL n-butanol, 2mL methanol, 20mL DI H2O

Re-milled for 3 hours and cast onto glass coated with slightly less WD40.

Before even allowing cast to dry, can see the slurry is far too thick. The slurry would not spread at all.

Will let dry overnight and attempt to scrape off and re-mill with more DI H2O tomorrow.

 Thursday, February 06, 2014, 10:57

Second cast was a lot thicker, but peeled off the glass nicely, will not re-cast. [see attached photo: cast2]

Some material was stuck to the WC jar wall and the balls, same as previously.

Initial UO2 powder used = 50.24g (Inventory R-00855A UO2 + bottle = 695.52g before use)

Graphite powder used = 10.05g

1st attempt = did not measure

2nd attempt dried UO2/C + organic mass = 46.56g (expecting to lose more uranium from re-casting a second time/ sticking to jar + balls)

The green was rolled up and wrapped in a piece of graphite sheet. [see attached photo: target boat]

The Ta-target boat was wrapped with 3-layers of heat shield and installed in EVAP1.

Chamber us currently being pumped down.

Target will be ramped up to 520A at the rate of 0.1A/min.

Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.

 Friday, February 07, 2014, 10:15

Chamber has pumped down overnight. IG1 currently @ 2.4e-6 Torr.

 Stepped up TGHT to 35A/0.187V.

Friday, February 07, 2014, 12:02 

TGHT sat at 35A for 2hrs. Pressure took a while to fully stabilize, currently sitting at 1.9e-5 Torr [see attached photo: pre auto-ramp]

Initiating auto-ramping.

 Monday, February 24, 2014, 13:37

TGHT reached max setpoint of 520A on friday night.

Power = 5.45V

IGP1 = 3.2e-6 Torr.

Carbonization process is complete.

Initiating auto-cooling at 2.0A/min.

 Thursday, October 09, 2014, 13:41

update rename: batch #09 - 02062014 to UC2Flk_01

 Tuesday, August 26, 2014, 11:54

UO2/C green was prepared Aug 20, 2014. The slurry was cast on a piece of glass coated with WD40 on Aug 21, 2014.

The cast peeled off the glass nicely Aug 22, 2014 and let dry until Aug 25, 2014.

Some materials were stuck on the WC jar wall and balls as always noted.

Initial UO2 powder used = 50.75g (Inventory R-00835A UO2 + bottle = 595.37g before use)

Graphite powder used = 10.78g

Green cast dried UO2/C + organic mass = 62.86g

The green was rolled up and wrapped in a piece of graphite sheet.

The Ta-target boat is wrapped with 3-Ta layers of heat shield and installed in Evap1.

Chamber is currently being pumped down.

Target will be ramped up to 520A at the rate of 0.1A/min

Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr

 Wednesday, August 27, 2014, 11:18

Chamber has pumped down overnight. IG1 = 6.4e-6 Torr

Stepped TGHT up to 35A.

 Wednesday, August 27, 2014, 14:41

Waited 1.5hrs for vacuum to fully stabilize, currently sitting at 2.2e-5 Torr.

Initiating auto-ramp.

 Friday, September 12, 2014, 14:09

TGHT reached max 520A/5.6V last night.

Carbonization process complete (see attachment: carbonization)

IG1 = 7.6e-6 Torr 

Initiating auto-cool at 2A/min

Will vent the chamber with Ar on Monday.

 Monday, September 22, 2014, 14:52

complete, UO2/C in glove box

 Thursday, October 09, 2014, 13:45

update rename: batch #11 - 08262014 to UC2Flk_03

 Tuesday, September 23, 2014, 14:54

UO2/C green was prepared Sept 18, 2014. The slurry was cast on a piece of glass coated with WD40 on Sept 19, 2014.

The cast was let dry over the weekend and peeled off the glass nicely Sept 22, 2014.

Some materials were stuck on the WC jar wall and balls as always noted.

Initial UO2 powder used = 50.04g (Inventory R-00835A UO2 + bottle = 544.51g before use)

Graphite powder used = 9.98g

Green cast dried UO2/C + organic mass = 59.35g

The green was rolled up and wrapped in a piece of graphite sheet.

The Ta-target boat is wrapped with 3-layers of heat shield and installed in Evap1.

Chamber is currently being pumped down.

Target will be ramped up to 520A at the rate of 0.1A/min

Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.

 Wednesday, September 24, 2014, 11:27

Chamber pumped down overnight.

IGP1 = 2.3e-6 Torr

Manually stepping TGHT up to 30A

 Wednesday, September 24, 2014, 14:00

Vacuum stable.

IGP1 = 1.3e-5 Torr.

Initiating auto-ramp.

Laura Lambert wrote:

Tuesday, September 23, 2014, 14:54 UO2/C green was prepared Sept 18, 2014. The slurry was cast on a piece of glass coated with WD40 on Sept 19, 2014. The cast was let dry over the weekend and peeled off the glass nicely Sept 22, 2014. Some materials were stuck on the WC jar wall and balls as always noted. Initial UO2 powder used = 50.04g (Inventory R-00835A UO2 + bottle = 544.51g before use) Graphite powder used = 9.98g Green cast dried UO2/C + organic mass = 59.35g The green was rolled up and wrapped in a piece of graphite sheet. The Ta-target boat is wrapped with 3-layers of heat shield and installed in Evap1. Chamber is currently being pumped down. Target will be ramped up to 520A at the rate of 0.1A/min Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.  Wednesday, September 24, 2014, 11:27 Chamber pumped down overnight. IGP1 = 2.3e-6 Torr Manually stepping TGHT up to 30A  Wednesday, September 24, 2014, 14:00 Vacuum stable. IGP1 = 1.3e-5 Torr. Initiating auto-ramp.

 Friday, October 10, 2014, 13:51

TGHT has reached to 520A for over 20hrs;  Carbonization process is complete (see attachment).

Ramping down at 2A/min. 

As much as I like to come to work, Monday is a holiday.  So, the chamber will be kept under vacuum. 

On Tuesday, the chamber will be vent in Ar. 

Friday, October 17, 2014, 11:47  

Vented and taken out on tuesday.

 Monday, January 26, 2015, 11:19

UO2/C green was prepared Jan 20, 2015. The slurry was cast on a piece of glass coated with WD40 on Jan 21, 2015.

The cast was let dry over the weekend and peeled off the glass nicely Jan 26, 2014. [see attached picture]

Some materials were stuck on the WC jar wall and balls, consistent with every time.

Initial UO2 powder used = 50.32g (Inventory R-00835A, UO2 + bottle = 494.52g before use)

Graphite powder used = 10.02g

Green cast dried UO2/C + organic mass = 60.33g

The green was rolled up and wrapped in a piece of graphite sheet.

The Ta-target boat is wrapped with 3-layers of heat shield and installed in Evap1.

Chamber is currently being pumped down.

Target boat will be ramped up to 520A at the rate of 0.1A/min

Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.

 Wednesday, January 28, 2015, 11:33

change of plan.

there will be several interruptions over the course of the next month including a planned power outage and water shut off.

therefore UO2/C cannot be carbonized as these interruptions  will trip off the system when UO2/C would be at max temperature.

EVAP1 is now turned off and the flakes will be stored in the fume hood until further notice.

 Thursday, April 09, 2015, 16:03

EVAP1 has been cleaned.

Target boat has been reloaded into evap1 and currently pumping down.

Will initiate ramp up tomorrow.

 Friday, April 10, 2015, 08:05

IGP1 = 1.7e-6 Torr

Tapped up manually to 35A.

Waited ~2hrs, vacuum stable.

IGP1 = 9.7e-6 Torr.

Initiating auto-ramp.

 Monday, April 20, 2015, 11:20

TGHT reahed 520A, 5.78V on the weekend.

The boat has been sitting at max setpoint for 4.5hours.

Carbonization process is complete [See attachment].

IGP1 = 3.4e-6 Torr.

Initiating auto-cool at 2A/min.

 Tuesday, April 21, 2015, 16:20

Vented in Ar and opened up today.

Now in glove box.

 Monday, May 11, 2015, 11:58

UC2 flakes produced = 46.477g

 Monday, May 11, 2015, 11:45

UO2/C green was prepared May 6, 2015. The slurry was cast on a piece of glass coated with WD40 on May 7, 2015.

The cast peeled off the glass nicely May 8, 2014 and finished drying over the weekend. [see attached picture]

Some materials were stuck on the WC jar wall and balls, consistent with every time.

Initial UO2 powder used = 50.44g (Inventory R-00835A, UO2 + bottle = 444.23g before use)

Graphite powder used = 10.05g

Green cast dried UO2/C + organic mass = 61.23g

The green was rolled up and wrapped in a piece of graphite sheet.

The Ta-target boat is wrapped with 3-layers of heat shield and installed in Evap1.

Chamber is currently being pumped down.

Target boat will be ramped up to 520A at the rate of 0.1A/min

Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.

 Tuesday, May 12, 2015, 08:40

IG1 = 3e-6 Torr

Tapping up manually to 35A...

Tuesday, May 12, 2015, 12:18

Waited ~2.5hrs.

Vacuum stable.

IG1 = 1.3e-5 Torr.

Initiating auto-ramp.

 Monday, May 25, 2015, 09:29

TGHT reached max setpoints on the 22nd.

IGP1 = 2.2e-6 Torr.

TGHT = 520A, 5.28V

Carbonization process is complete [see attachment].

Initiating auto-cool at 2.0A/min.

 Wednesday, May 27, 2015, 08:47

Vented in argon and opened up yesterday afternoon.

Uranium flakes in glove box.

 Wednesday, May 27, 2015, 16:09

UC2 flakes produced = 47.647g

 Thursday, July 30, 2015, 17:10

The mixture of UO2/C was prepared on July 13, 2015.  See screen shot for more info. 

The material is loaded into a target boat and wrapped with 3 layers of Ta-heat shield. 

 Chamber is currently being pumped down

Target boat will be ramped up to 520A at the rate of 0.1A/min

Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.

 Friday, July 31, 2015, 14:33

Chamber has been pumped down overnight, currently at 3.3e-6 Torr.

Manually stepping up to 35A.

Set auto ramping TGHT to 200A at 0.1A/min for over the long weekend.  This current should be safe to just burn off the organic binder but not to start the carbonization process. 

John Wong wrote:

Thursday, July 30, 2015, 17:10 The mixture of UO2/C was prepared on July 13, 2015.  See screen shot for more info.  The material is loaded into a target boat and wrapped with 3 layers of Ta-heat shield.   Chamber is currently being pumped down Target boat will be ramped up to 520A at the rate of 0.1A/min Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.  Friday, July 31, 2015, 14:33 Chamber has been pumped down overnight, currently at 3.3e-6 Torr. Manually stepping up to 35A. Set auto ramping TGHT to 200A at 0.1A/min for over the long weekend.  This current should be safe to just burn off the organic binder but not to start the carbonization process.  Wednesday, August 05, 2015, 11:05    TGHT reached 200A about 5 hours ago.  Organic burn out is complete.   Begin carbonization:  Increase TGHT to 520A at 0.1A/min rate.

 Tuesday, August 11, 2015, 08:38

IGP1 = 6.8e-6 Torr

TGHT = 520A, 5.5V

TGHT sat at max setpoint for ~15hours

Initiating auto-cool at 2.0A/min.

 Wednesday, August 12, 2015, 16:02

Vented in Argon and opened up this afternoon.

Transferred into glove box.

 Wednesday, August 19, 2015, 11:02

UO2/C green was prepared Aug 11, 2015. The slurry was cast on a piece of glass coated with WD40 on Aug 12, 2015.

The cast peeled off the glass nicely Aug 14, 2014 and finished drying over the weekend. [see attached picture]

Some materials were stuck on the WC jar wall and balls, consistent with every time.

Initial UO2 powder used = 50.34g (Inventory R-00835A, UO2 + bottle = 343.60g before use)

Graphite powder used = 10.14g

Green cast dried UO2/C + organic mass = 61.42g

The green was rolled up and wrapped in a piece of graphite sheet.

The Ta-target boat is wrapped with 3-layers of heat shield and installed in Evap1.

Chamber has been pumped down overnight, currently at IG1 = 2.5e-6 Torr.

Manually stepping up to 35A.

Target boat will be ramped up to 520A at the rate of 0.1A/min.

Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.

 Wednesday, August 19, 2015, 14:05

Waited ~2.5hrs, vacuum stable.

IG1 = 1.2e-5 Torr.

Initiating auto-ramp.

 Monday, August 31, 2015, 09:38

EVAP 1 tripped off saturday 29th, due to a power outage with TGHT = ~450A at time of trip-off.

EVAP1 lost vacuum for ~4.5hrs [see archived photo]

Visual check performed of EVAP1 - OK.

IGP1 = 6.4e-7 Torr.

Re-initiating carbonization process.

 Monday, August 31, 2015, 10:05

Tapped up manually to 30A.

Vacuum stable.

Initiating auto-ramp at 2.0A/min to a final setpoint of 200A.

 Monday, August 31, 2015, 11:33

Increased max setpoint to 250A at 2.0A/min.

According to the archive, step 1 of the carbonization process was complete and vacuum dropped at ~TGHT = 250A

Vacuum still stable IGP1 = 2.7e-6 Torr.

Once 250A achieved, changed auto ramp to 0.2A/min with a final setpoint of 300A over lunch.

Will tap up manually after lunch.

 Monday, August 31, 2015, 13:07

IGP1 = 1.66e-6 Torr.

TGHT = 262A, 2.3V

Turning off auto-ramp, taking over manually...

 Monday, August 31, 2015, 16:15

Tapped up manually to TGHT = 355A, 3.5V

IGP1 = 5.8e-6 Torr.

Re-initiating auto-ramp at 0.1A/min with a final setpoint of 520A

 Wednesday, September 02, 2015, 09:04

IG1 = 7.5e-6 Torr

TGHT = 520A, 5.53V

TGHT remained at max setpoints ~12.5hours.

Carbonization process is complete.

Initiating auto-cool at 2.0A/min.

 Thursday, September 03, 2015, 11:55

UCx vented in Ar, removed from evap1 and currently in glove box this morning.

Will measure quantity obtained this afternoon.

 Thursday, September 03, 2015, 13:27

Attached are a few notable striptool screenshots from the entire carbonization process.

UCxflk_08 = 46.926g

 Monday, September 14, 2015, 15:28

Green cast dried UO2/C + organic mass = 61.31g

The green was rolled up and wrapped in a piece of graphite sheet.

The Ta-target boat is wrapped with 3-layers of heat shield and installed in Evap1.

 Wednesday, September 16, 2015, 17:55

The work in the B2 level is done; the nuclear ventilation for the evaporators is now operational. 

Tried to turn on the backing pump, but failed. 

Submitted an fault #8428 to vacuum group

 Thursday, September 17, 2015, 12:23

Vacuum group responded to the e-fault, and a new pump is installed.

Chamber is currently being pumped down.

 Friday, September 18, 2015, 14:12

Chamber pressure is at 3.0e-6 Torr.

TGHT stepped up to 30A.

Target boat will be ramped up to 520A at the rate of 0.1A/min

Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.

 Friday, September 18, 2015, 16:05

Pressure stabilized at 3.6e-5 Torr. 

Initiate autoramping

 Monday, September 21, 2015, 11:38

TGHT was found tripped off at 50A on Saturday at about 6am; the backing pump gauge went up to 150mTorr at the same time (see attachment)

Note that a refurbished backing pump was installed before starting this process.  It could be a leak somewhere; will let vacuum group to inspect this. 

 Monday, September 21, 2015, 15:34

Vacuum group took a look at the pump.  It was the bleeding valve that was not properly close while the pump was installed.  So after some period of running, the valve got loosen from the pump's vibration and caused the leak. 

The pump is now back to operational. 

Chamber is being pumped again.  Once the vacuum is good, TGHT will be stepped up to 50A and autoramping will be initiated once it's ready.

 Monday, September 21, 2015, 17:51

TGHT at 50A, IG at 3.6e-6 Torr.

Initiated autoramping.

 Wednesday, September 30, 2015, 10:11

TGHT has reached to 520A/5.36V.  The carbonization process is complete, vacuum at 3.29e-6 Torr, BP at 12mTorr. (see attachment#2)

Initiated auto-cooling at 2A/min.

 Wednesday, December 02, 2015, 14:08

UO2/C was cast onto a graphite sheet in the fume hood and let dry.

Initial UO2 powder used = 25.11g (Inventory R-00835A, UO2 + bottle = 243.44g before use)

Graphite powder used = 5.16g

A 13mm punch was used to punch out discs from an 11mm wide strip.

5 discs were packed into one end of the graphite tube and a single 1cmx2cm strip was placed in the other end.

graphite tube = 4.57g

5 x UO2/C discs = 0.62g

2cm x 1cm strip = 0.21g

the graphite tube is placed inside a target boat.

The Ta-target boat is wrapped with 3-layers of heat shield and installed in Evap1.

Pumping down overnight.

Thursday, December 03, 2015, 09:23 

IG1 = 5.7e-6 Torr.

Stepped up manually to 60A.

Waited ~1hr45, vacuum stable.

IG1 = 6.3e-6 Torr.

Initiating auto-ramp.

Target boat will be ramped up to 520A at the rate of 0.1A/min.

Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.

 Monday, December 07, 2015, 10:45

UO2/C reached 520A yesterday and has remained at max setpoint for 15hrs.

IG1 = 5.2e-6 Torr.

TGHT = 520A, 5.35V

Carbonization process is complete.

Initiating auto-cool at 2.0A/min.

 Wednesday, December 09, 2015, 10:09

Vented in argon and took the materials out yesterday.

Currently sitting in glove box.

All five discs and strip had fallen out of graphite tube and were sitting directly on the target boat.

^not sure if due to removal of heat shields [moving target boat around shook materials out of tube] or if this happened during carbonization process.

materials stuck to graphite foil fairly well, able to handle foils with tweezers and inspect without materials flaking off.

lightly scraped top of discs with spatula - no materials flaked off.

minor cracks are visible on discs.

graphite tube shows no visible changes.

 Thursday, December 10, 2015, 08:54

Filled graphite tube with 34 UO2/C discs cast onto graphite.

34 discs = 4.10g

graphite tube = 4.64g

IG1 = 2.8e-6 Torr.

Stepped up manually to 35A.

Waited ~1hr15, vacuum stable.

IG1 = 5.8e-6 Torr.

Initiating auto-ramp.

Target boat will be ramped up to 520A at the rate of 0.1A/min.

Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.

 Monday, December 14, 2015, 08:58

IG1 = 3.9e-6 Torr.

TGHT = 520A, 5.7

UO2/C reached 520A yesterday and has remained at max setpoint for ~12hrs.

Carbonization process is complete.

Initiating auto-cool at 2.0A/min.

 Friday, December 18, 2015, 15:37

Vented in argon and removed from evap1

Graphite tube appears golden in colour [ see photo attached]

Materials spilled out of graphite tube, could be partially due to movement of target boat between evaporator and glove box and removal of heat shields.

Black graphite tube in weigh boat behind target is the graphite tube from the first round in evap1, shows a comparison in colour difference between the two rounds.

The difference between round 1 and round2:

-round1 contained 5 single discs packed together and a single 1cm/2cm square on the other end

-round2 contained 34 discs packed together consuming the whole graphite tube

All other parameters ie. max setpoints, were the same.

 Tuesday, March 08, 2016, 10:01

UO2/C green was prepared March 2, 2016.

This was the first time using the new rack built for holding multiple casts [see photo attached]

The cast peeled off the glass nicely March 3, 2014 and finished drying over the weekend. [see attached picture]

Some materials were stuck on the WC jar wall and balls, consistent with every time.

Initial UO2 powder used = 50.03g (Inventory R-00835A, UO2 + bottle = 218.54g before use)

Graphite powder used = 10.14g

Green cast dried UO2/C + organic mass = 60.08g 

The green was rolled up and wrapped in a piece of graphite sheet.

The Ta-target boat is wrapped with 3-layers of heat shield and installed in Evap1.

Chamber has been pumped down overnight, currently at IG1 = 4.5e-6 Torr.

Manually stepping up to 35A...

Target boat will be ramped up to 520A at the rate of 0.1A/min.

Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.

Tuesday, March 08, 2016, 16:01

Waited ~3hrs, vacuum stable.

IG1 = 1.4e-5 Torr.

Initiating auto-ramp.

 Monday, March 21, 2016, 08:33

IG1 = 1.9e-6 Torr

TGHT = 520A, 5.13V

TGHT remained at max setpoints for ~63.5hrs [over the weekend].

Carbonization process is complete.

Initiating auto-cool at 2.0A/min.

 Thursday, March 24, 2016, 10:19

vented in argon and removed from evap1.

stored in glove box.

total flakes produced: 46.26g

Tuesday, April 05, 2016, 10:58

UO2/C green was prepared March 31, 2016.

The cast peeled off the glass nicely April 1, 2016 and finished drying over the weekend. [see attached picture]

Some materials were stuck on the WC jar wall and balls, consistent with every time.

Initial UO2 powder used = 50.47g (Inventory R-00835A, UO2 + bottle = 168.33g before use)

Graphite powder used = 10.05g

Green cast dried UO2/C + organic mass = 59.50g 

The green was rolled up and wrapped in a piece of graphite sheet.

The Ta-target boat was wrapped with 3-layers of heat shield and installed in evap1 yesterday.

Chamber has been pumped down overnight, currently at IG1 = 3.7e-6 Torr.

Manually stepping up to 35A...

Target boat will be ramped up to 520A at the rate of 0.1A/min.

Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.

Tuesday, April 05, 2016, 15:04

Waited ~4hrs, vacuum stable.

IG1 = 8.5e-6 Torr.

Initiating auto-ramp.

 Friday, April 15, 2016, 13:50

IG1 = 3.2e-6 Torr

TGHT = 520A, 5.15V

TGHT remained at max setpoints for ~10hrs

Carbonization process is complete.

Initiating auto-cool at 2.0A/min.

 Monday, April 18, 2016, 11:08

vented in argon and removed from evap1.

stored in glove box.

will measure flakes produced tomorrow...

 Tuesday, April 19, 2016, 15:32

UC2 flakes produced = 45.99g

Friday, September 23, 2016, 16:01

*Note: materials were scaled back small amount since only 48.5g of UO2 was left in bottle when usually 50g required to make slurry

UO2/C green was prepared September 22, 2016.

The cast peeled off the glass nicely September 23, 2016 and loaded into evap1.

Some materials were stuck on the WC jar wall and balls, consistent with every time.

Initial UO2 powder used = 48.52g (Inventory R-00835A, no more UO2 left in bottle! Empty bottle = 68.33g)

Graphite powder used = 9.78g

Green cast dried UO2/C + organic mass = 59.21g 

The green was rolled up and wrapped in a piece of graphite sheet.

The Ta-target boat was wrapped with 3-layers of heat shield and installed in evap1 today.

Chamber is currently pumping down, will remain under vacuum over weekend and initiate ramping process monday.

Target boat will be ramped up to 520A at the rate of 0.1A/min.

Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.

Monday, September 26, 2016, 13:52

IG1 = 1.56e-6 Torr

Tapped up to 35A

Waited ~1.5hrs, vacuum stable.

IG1 = 1.23e-5 Torr

Initiating auto-ramp

 Friday, October 07, 2016, 13:19

TGHT tripped off oct 5th at 7pm   alarm handlers were not on, so pager never went off

TGHT was at ~450A and vacuum stable when it tripped off

Reason for this is currently unknown

Ion gauge didn't trip off, neither did the water

Auto-ramping at 2.0A/min back up to 400A currently...

 Friday, October 07, 2016, 16:30

TGHT was ramped up to 420A at 2.0A/min today

IG1 = 4.9e-5 Torr

Changed ramping rate to 0.1A/min for the TGHT with a final setpoint of 520A

Alarm handlers on: if anything happens over weekend pager will go off

Tuesday, October 11, 2016, 10:30 

IG1 = 1.2e-6 Torr

TGHT = 520A, 5.35V

TGHT has remained at max setpoint for ~2.5days

Carbonization process is complete.

Initiating auto-cool at 2.0A/min.

 Wednesday, October 12, 2016, 16:23

Vented in Ar and opened up evap1 this morning.

Stored in glove box.

Flakes look good, ~45g produced.

 Monday, November 07, 2016, 13:29

UO2/C green was prepared Nov 3rd, 2016.

This is the first cast made with the new batch of UO2 [but from the same purchase as the last batch]

The cast peeled off the glass nicely Nov 4th, 2016 and finished drying over the weekend.

Some materials were stuck on the WC jar wall and balls, consistent with every time.

Initial UO2 powder used = 50.16g (Inventory R-01032A, UO2 + bottle = 1078.15g before use)

Graphite powder used = 10.03g

Green cast dried UO2/C + organic mass = 60.91g 

The green was rolled up and wrapped in a piece of graphite sheet.

The Ta-target boat was wrapped with 3-layers of heat shield and installed in evap1 today.

Chamber is currently pumping down, IG1 = 2.4e-5 Torr.

Target boat will be ramped up to 520A at the rate of 0.1A/min.

Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.

 Tuesday, November 08, 2016, 07:43

IG1 = 2.4e-6 Torr

Tapped up to 35A, 0.50V

Waited ~50min, vacuum stable.

IG1 = 1.3e-5 Torr

Initiating auto-ramp

Laura Lambert wrote:

Monday, November 07, 2016, 13:29 UO2/C green was prepared Nov 3rd, 2016. This is the first cast made with the new batch of UO2 [but from the same purchase as the last batch] The cast peeled off the glass nicely Nov 4th, 2016 and finished drying over the weekend. Some materials were stuck on the WC jar wall and balls, consistent with every time. Initial UO2 powder used = 50.16g (Inventory R-01032A, UO2 + bottle = 1078.15g before use) Graphite powder used = 10.03g Green cast dried UO2/C + organic mass = 61.91g  The green was rolled up and wrapped in a piece of graphite sheet. The Ta-target boat was wrapped with 3-layers of heat shield and installed in evap1 today. Chamber is currently pumping down, IG1 = 2.4e-5 Torr. Target boat will be ramped up to 520A at the rate of 0.1A/min. Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.  Tuesday, November 08, 2016, 07:43 IG1 = 2.4e-6 Torr Tapped up to 35A, 0.50V Waited ~50min, vacuum stable. IG1 = 1.3e-5 Torr Initiating auto-ramp

 Tuesday, November 15, 2016, 09:59

TGHT reached to 520A/5.12V; however the pressure was still remained high at the limit 5.0e-5 Torr which indicating that the carbonization process isn't complete yet.

Increase TGHT to 520A at a ramping rate of 0.1A/min.

John Wong wrote:

Laura Lambert wrote:  Monday, November 07, 2016, 13:29 UO2/C green was prepared Nov 3rd, 2016. This is the first cast made with the new batch of UO2 [but from the same purchase as the last batch] The cast peeled off the glass nicely Nov 4th, 2016 and finished drying over the weekend. Some materials were stuck on the WC jar wall and balls, consistent with every time. Initial UO2 powder used = 50.16g (Inventory R-01032A, UO2 + bottle = 1078.15g before use) Graphite powder used = 10.03g Green cast dried UO2/C + organic mass = 61.91g  The green was rolled up and wrapped in a piece of graphite sheet. The Ta-target boat was wrapped with 3-layers of heat shield and installed in evap1 today. Chamber is currently pumping down, IG1 = 2.4e-5 Torr. Target boat will be ramped up to 520A at the rate of 0.1A/min. Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.  Tuesday, November 08, 2016, 07:43 IG1 = 2.4e-6 Torr Tapped up to 35A, 0.50V Waited ~50min, vacuum stable. IG1 = 1.3e-5 Torr Initiating auto-ramp    Tuesday, November 15, 2016, 09:59 TGHT reached to 520A/5.12V; however the pressure was still remained high at the limit 5.0e-5 Torr which indicating that the carbonization process isn't complete yet. Increase TGHT to 520A at a ramping rate of 0.1A/min.

 Wednesday, November 16, 2016, 11:55

*John increased maxTGHT setpoint to 530A not 520A

When the TGHT reached 520A, the vacuum was still at it's limit. Usually the vacuum starts to drop and stabilize slightly before the max setpoint is reached.

In the photo from UCx_flk10 at ~490A, the vacuum started to drop indicating the carbonization process was complete.

In the image posted from the current carbonization process one can see the vacuum was still at its limit when the TGHT reached its max set point of 520A meaning the carbonization process remains incomplete.

 Thursday, November 17, 2016, 07:36

Vacuum still high, carbonization remains incomplete.

Remained at 530A for ~18hrs

TGHT = 530A, 5.24V

IG1 = 3.8e-5 Torr

Increasing max setpoint to 540A.

 Thursday, November 17, 2016, 13:54

Vacuum remains high after ramping up to 540A, IG1 = 4.5e-5 Torr - still not fully carbonized

TGHT = 540A, 5.36V

Increasing max setpoint to 550A

 Thursday, November 17, 2016, 15:29

Vacuum still high

Increasing max setpoint to 580A

See excel to confirm this remains under 4kW

Wouldn't want to go much above 4kW otherwise container will break

 Friday, November 18, 2016, 13:14

Vacuum stable and decreasing - carbonization process complete.

Evap1 has remained at max setpoints for ~6.5hrs

IG1 = 5.6e-6 Torr

TGHT = 580A, 5.69V

Initiating auto-cool at 1.0A/min

 Monday, November 21, 2016, 16:20

Vented in Ar and opened up evap1 today.

Stored in glove box.

UC2 flakes produced = 47.23g

 Tuesday, November 29, 2016, 16:13

UO2/C green was prepared Nov 23rd, 2016.

The cast peeled off the glass nicely Nov 24th, 2016 and finished drying over the weekend.

Some materials were stuck on the WC jar wall and balls, consistent with every time.

Initial UO2 powder used = 50.61g (Inventory R-01032A, UO2 + bottle = 1028.05g before use)

Graphite powder used = 10.16g

Green cast dried UO2/C + organic mass = 61.94g 

The green was rolled up and wrapped in a piece of graphite sheet.

A new Ta target boat is being used due to the previous one being old and is now very expanded.

The last round of flakes being carbonized [UC2flk_13] showed a slight change in current and power from previous carbonization process', also indicating the target boat should be retired.

The new boat has only been used once in evap1 to sinter some endcaps earlier in the year.

This target boat is slightly different than the old one because both ends are open, no endcaps are attached to the boat.

The Ta-target boat was wrapped with 3-layers of heat shield and installed in evap1 today.

Chamber is currently pumping down...

Target boat will be ramped up to 520A at the rate of 0.1A/min.

Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.

Wednesday, November 30, 2016, 13:09

IG1 = 3.2e-6 Torr

Tapped up to 35A, 0.34V

Waited ~2hrs, vacuum stable.

IG1 = 8.7e-6 Torr

Initiating auto-ramp

 Monday, December 12, 2016, 09:15

Vacuum stable - carbonization process complete.

Evap1 remained at max setpoints over wknd

IG1 = 1.47e-6 Torr

TGHT = 520A, 5.12V

Initiating auto-cool at 1.0A/min

 Tuesday, December 13, 2016, 16:30

Vented in Ar and opened up evap1 today.

As previously mentioned this new target boat has no endcaps and one can see in the photo more materials have dispersed onto the sides of evap1

These materials appear to be mostly graphite since there are no visible holes through the graphite wrapping that surrounds the UC2 flakes.

Stored in glove box.

 Friday, March 03, 2017, 08:53

UO2/C green was prepared Feb 28th, 2017.

The cast peeled off the glass nicely March 2nd, 2017 and loaded into evap1.

Some materials were stuck on the WC jar wall and balls, consistent with every time.

Initial UO2 powder used = 50.08g (Inventory R-01032A, UO2 + bottle = 977.24g before use)

Graphite powder used = 10.05g

Green cast dried UO2/C + organic mass = 63.21g 

The green was rolled up and wrapped in a piece of graphite sheet.

The Ta-target boat was wrapped with 3-layers of heat shield and installed in evap1 today.

Chamber pumped down overnight.

Target boat will be ramped up to 520A at the rate of 0.1A/min.

Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.

IG1 = 3.2e-6 Torr

Tapped up to 35A, 0.40V

Waited ~5hrs, vacuum stable.

IG1 = 6.8e-6 Torr

Initiating auto-ramp

 Monday, March 06, 2017, 08:47

Evap1 tripped off fri night.

See attached screenshot of strip tool.

Had continued to ramp up and was at ~340A, but since the power supply had tripped off this was not actually being applied.

TGHT set back to zero, auto-ramp turned off.

Will investigate further before re-starting...

 Tuesday, March 07, 2017, 09:50

Have not figured out reasoning behind power trip.

According to controls, there were no power bumps at that time.

Water was still on - had not tripped off.

Tapped back up manually to 40A yesterday morning.

Remained at 40A overnight.

IG1 = 4.46e-6 Torr this morning.

TGHT = 40A, 0.38V

Re-initiated auto-ramp.

 Monday, March 13, 2017, 15:46 by AM

IG1 = 5.2E-5 Torr

TGHT= 436A 4.28V

Thursday, March 16, 2017, 08:37 by AM

TGHT reached 520A @ 5.37V this morning. Vacuum  at 6.2E-6 Torr

Friday, March 17, 2017, 08:21 by AM

520A @ 5.37V this morning. Vacuum  at 2.2E-6 Torr

Ramping down

 Tuesday, May 23, 2017, 14:42

UO2/C green was prepared May 16th, 2017.

The cast peeled off the glass nicely May 17th, 2017.

Initial UO2 powder used = 50.25g (Inventory R-01032A, UO2 + bottle = 876.80g before use)

Graphite powder used = 10.32g

Green cast dried UO2/C + organic mass = 61.70g 

The green was rolled up and wrapped in a piece of graphite sheet.

The Ta-target boat was wrapped with 1 long layer of heat shield and installed in evap1 today.

Chamber pumped down today.

Target boat will be ramped up to 520A at the rate of 0.1A/min.

Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.

IG1 = 4.80e-6 Torr

Tapped up to 30A, 0.45V

Waited ~1hr, vacuum stable.

IG1 = 8.3e-6 Torr

Initiating auto-ramp

 Wednesday, May 24, 2017, 09:26

IG1 = 5.5e-5 Torr

TGHT = 64A, 0.72V

Vacuum currently yo-yo-ing.

Changing vacuum limits to attempt to speed up process.

Vacuum limit stop at 1.0e-4 Torr, backing off at 5.0e-4 Torr.

Once vacuum settles and vacuum starts to drop will adjust limits again accordingly.

 Wednesday, May 24, 2017, 11:17

IG1 = 1.2e-4 Torr

TGHT = 69A, 0.74V

TGHT direct readout = 66A, 0.73V

Thermometer attached to TP = 41.0C

Room temp = 24.0C

Wednesday, May 24, 2017, 13:16 

Vacuum going well.

Stable yo-yo-ing at current vacuum limit.

TP = 41.5C, RT = 23.9C

IG1 = 1.2e-4 Torr

TGHT = 71A, 0.77V

Increasing vacuum limit stop to 2.0e-4 Torr.

Thursday, May 25, 2017, 13:03

Vacuum has stabilized.

TGHT = 188A, 1.85V

IG1 = 2.2e-5 Torr.

Adjusting vacuum limits so when 2nd phase starts, vacuum does not spike.

Vacuum limit stop at 5.0e-5 Torr, backing off at 1.0e-4 Torr.

Laura Lambert wrote:

Tuesday, May 23, 2017, 14:42 UO2/C green was prepared May 16th, 2017. The cast peeled off the glass nicely May 17th, 2017. Initial UO2 powder used = 50.25g (Inventory R-01032A, UO2 + bottle = 876.80g before use) Graphite powder used = 10.32g Green cast dried UO2/C + organic mass = 61.70g  The green was rolled up and wrapped in a piece of graphite sheet. The Ta-target boat was wrapped with 1 long layer of heat shield and installed in evap1 today. Chamber pumped down today. Target boat will be ramped up to 520A at the rate of 0.1A/min. Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr. IG1 = 4.80e-6 Torr Tapped up to 30A, 0.45V Waited ~1hr, vacuum stable. IG1 = 8.3e-6 Torr Initiating auto-ramp  Wednesday, May 24, 2017, 09:26 IG1 = 5.5e-5 Torr TGHT = 64A, 0.72V Vacuum currently yo-yo-ing. Changing vacuum limits to attempt to speed up process. Vacuum limit stop at 1.0e-4 Torr, backing off at 5.0e-4 Torr. Once vacuum settles and vacuum starts to drop will adjust limits again accordingly.  Wednesday, May 24, 2017, 11:17 IG1 = 1.2e-4 Torr TGHT = 69A, 0.74V TGHT direct readout = 66A, 0.73V Thermometer attached to TP = 41.0C Room temp = 24.0C Wednesday, May 24, 2017, 13:16  Vacuum going well. Stable yo-yo-ing at current vacuum limit. TP = 41.5C, RT = 23.9C IG1 = 1.2e-4 Torr TGHT = 71A, 0.77V Increasing vacuum limit stop to 2.0e-4 Torr. Thursday, May 25, 2017, 13:03 Vacuum has stabilized. TGHT = 188A, 1.85V IG1 = 2.2e-5 Torr. Adjusting vacuum limits so when 2nd phase starts, vacuum does not spike. Vacuum limit stop at 5.0e-5 Torr, backing off at 1.0e-4 Torr.

 Friday, May 26, 2017, 13:40

Everything tripped off this morning at around 4:30am

This was not due to the vacuum spiking as one would expect.

No power bumps according to  ISAC controls.

Looking back on elogs  [see elog i.d. 145] evap1 had also tripped off during the last round of carbonizing UO2, however last time everything tripped off ~60A.

For last trip off the water valve remained open and on.

This time  WV1 showed yellow in the TGHT epics box, off under WV epics box, but black [open] in the WV epics box diagram [see screenshot for better understanding].

Water valves are closed - confirmed in person - water wheels not turning.

Trip-off occured ~275A.

Vacuum was stable at trip-off point; IG1 ~6e-6 Torr 

Reason: currently unknown.

Laura Lambert wrote:

Laura Lambert wrote:  Tuesday, May 23, 2017, 14:42 UO2/C green was prepared May 16th, 2017. The cast peeled off the glass nicely May 17th, 2017. Initial UO2 powder used = 50.25g (Inventory R-01032A, UO2 + bottle = 876.80g before use) Graphite powder used = 10.32g Green cast dried UO2/C + organic mass = 61.70g  The green was rolled up and wrapped in a piece of graphite sheet. The Ta-target boat was wrapped with 1 long layer of heat shield and installed in evap1 today. Chamber pumped down today. Target boat will be ramped up to 520A at the rate of 0.1A/min. Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr. IG1 = 4.80e-6 Torr Tapped up to 30A, 0.45V Waited ~1hr, vacuum stable. IG1 = 8.3e-6 Torr Initiating auto-ramp  Wednesday, May 24, 2017, 09:26 IG1 = 5.5e-5 Torr TGHT = 64A, 0.72V Vacuum currently yo-yo-ing. Changing vacuum limits to attempt to speed up process. Vacuum limit stop at 1.0e-4 Torr, backing off at 5.0e-4 Torr. Once vacuum settles and vacuum starts to drop will adjust limits again accordingly.  Wednesday, May 24, 2017, 11:17 IG1 = 1.2e-4 Torr TGHT = 69A, 0.74V TGHT direct readout = 66A, 0.73V Thermometer attached to TP = 41.0C Room temp = 24.0C Wednesday, May 24, 2017, 13:16  Vacuum going well. Stable yo-yo-ing at current vacuum limit. TP = 41.5C, RT = 23.9C IG1 = 1.2e-4 Torr TGHT = 71A, 0.77V Increasing vacuum limit stop to 2.0e-4 Torr. Thursday, May 25, 2017, 13:03 Vacuum has stabilized. TGHT = 188A, 1.85V IG1 = 2.2e-5 Torr. Adjusting vacuum limits so when 2nd phase starts, vacuum does not spike. Vacuum limit stop at 5.0e-5 Torr, backing off at 1.0e-4 Torr.    Friday, May 26, 2017, 13:40 Everything tripped off this morning at around 4:30am This was not due to the vacuum spiking as one would expect. No power bumps according to  ISAC controls. Looking back on elogs  [see elog i.d. 145] evap1 had also tripped off during the last round of carbonizing UO2, however last time everything tripped off ~60A. For last trip off the water valve remained open and on. This time  WV1 showed yellow in the TGHT epics box, off under WV epics box, but black [open] in the WV epics box diagram [see screenshot for better understanding]. Water valves are closed - confirmed in person - water wheels not turning. Trip-off occured ~275A. Vacuum was stable at trip-off point; IG1 ~6e-6 Torr  Reason: currently unknown.

 Friday, May 26, 2017, 15:43

Starting pumping down again this afternoon while trying to understand trip-off - no progress on that end.

IG1 = 4.9e-6 Torr

Tapped up to 40A, 0.24V

Vacuum spiked to 2e-5 Torr

Backed off to 35A, 0.20V

Showing lower voltage output than the last round that had tripped off...but ramping is so early on/ low current, hard to tell...

Vacuum stable.

IG1 = 5.4e-6 Torr

Target boat will be ramped up to 275A [trip-off point] at the rate of 0.1A/min.

Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.

TP = 37.9C, RT = 25.2C

Laura Lambert wrote:

Laura Lambert wrote: Laura Lambert wrote:  Tuesday, May 23, 2017, 14:42 UO2/C green was prepared May 16th, 2017. The cast peeled off the glass nicely May 17th, 2017. Initial UO2 powder used = 50.25g (Inventory R-01032A, UO2 + bottle = 876.80g before use) Graphite powder used = 10.32g Green cast dried UO2/C + organic mass = 61.70g  The green was rolled up and wrapped in a piece of graphite sheet. The Ta-target boat was wrapped with 1 long layer of heat shield and installed in evap1 today. Chamber pumped down today. Target boat will be ramped up to 520A at the rate of 0.1A/min. Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr. IG1 = 4.80e-6 Torr Tapped up to 30A, 0.45V Waited ~1hr, vacuum stable. IG1 = 8.3e-6 Torr Initiating auto-ramp  Wednesday, May 24, 2017, 09:26 IG1 = 5.5e-5 Torr TGHT = 64A, 0.72V Vacuum currently yo-yo-ing. Changing vacuum limits to attempt to speed up process. Vacuum limit stop at 1.0e-4 Torr, backing off at 5.0e-4 Torr. Once vacuum settles and vacuum starts to drop will adjust limits again accordingly.  Wednesday, May 24, 2017, 11:17 IG1 = 1.2e-4 Torr TGHT = 69A, 0.74V TGHT direct readout = 66A, 0.73V Thermometer attached to TP = 41.0C Room temp = 24.0C Wednesday, May 24, 2017, 13:16  Vacuum going well. Stable yo-yo-ing at current vacuum limit. TP = 41.5C, RT = 23.9C IG1 = 1.2e-4 Torr TGHT = 71A, 0.77V Increasing vacuum limit stop to 2.0e-4 Torr. Thursday, May 25, 2017, 13:03 Vacuum has stabilized. TGHT = 188A, 1.85V IG1 = 2.2e-5 Torr. Adjusting vacuum limits so when 2nd phase starts, vacuum does not spike. Vacuum limit stop at 5.0e-5 Torr, backing off at 1.0e-4 Torr.    Friday, May 26, 2017, 13:40 Everything tripped off this morning at around 4:30am This was not due to the vacuum spiking as one would expect. No power bumps according to  ISAC controls. Looking back on elogs  [see elog i.d. 145] evap1 had also tripped off during the last round of carbonizing UO2, however last time everything tripped off ~60A. For last trip off the water valve remained open and on. This time  WV1 showed yellow in the TGHT epics box, off under WV epics box, but black [open] in the WV epics box diagram [see screenshot for better understanding]. Water valves are closed - confirmed in person - water wheels not turning. Trip-off occured ~275A. Vacuum was stable at trip-off point; IG1 ~6e-6 Torr  Reason: currently unknown.        Friday, May 26, 2017, 15:43 Starting pumping down again this afternoon while trying to understand trip-off - no progress on that end. IG1 = 4.9e-6 Torr Tapped up to 40A, 0.24V Vacuum spiked to 2e-5 Torr Backed off to 35A, 0.20V Showing lower voltage output than the last round that had tripped off...but ramping is so early on/ low current, hard to tell... Vacuum stable. IG1 = 5.4e-6 Torr Target boat will be ramped up to 275A [trip-off point] at the rate of 0.1A/min. Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.   TP = 37.9C, RT = 25.2C

 Monday, May 29, 2017, 08:21

Initially it looks like not enough time had been allowed for the vacuum to settle before initiating the auto-ramp resulting in the vacuum spiking and tripping off the system.

A closer look shows that is not the case.

Note: the vacuum limits were set to stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr. 

The TGHT started to back off when the vacuum was ~6e-6 Torr, this is considered a good vacuum and should not have caused the system to initiate backing off yet.

Over the course of ~1min, evap1 had backed off all the way down to 0A.

At this point the vacuum was now up to ~1.75e-5 Torr and still rising.

~34min after the TGHT had reached 0A, the vacuum eventually reached 8e-4 Torr and tripped off the evaporator.

See photos attached.

Laura Lambert wrote:

Laura Lambert wrote: Laura Lambert wrote: Laura Lambert wrote:  Tuesday, May 23, 2017, 14:42 UO2/C green was prepared May 16th, 2017. The cast peeled off the glass nicely May 17th, 2017. Initial UO2 powder used = 50.25g (Inventory R-01032A, UO2 + bottle = 876.80g before use) Graphite powder used = 10.32g Green cast dried UO2/C + organic mass = 61.70g  The green was rolled up and wrapped in a piece of graphite sheet. The Ta-target boat was wrapped with 1 long layer of heat shield and installed in evap1 today. Chamber pumped down today. Target boat will be ramped up to 520A at the rate of 0.1A/min. Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr. IG1 = 4.80e-6 Torr Tapped up to 30A, 0.45V Waited ~1hr, vacuum stable. IG1 = 8.3e-6 Torr Initiating auto-ramp  Wednesday, May 24, 2017, 09:26 IG1 = 5.5e-5 Torr TGHT = 64A, 0.72V Vacuum currently yo-yo-ing. Changing vacuum limits to attempt to speed up process. Vacuum limit stop at 1.0e-4 Torr, backing off at 5.0e-4 Torr. Once vacuum settles and vacuum starts to drop will adjust limits again accordingly.  Wednesday, May 24, 2017, 11:17 IG1 = 1.2e-4 Torr TGHT = 69A, 0.74V TGHT direct readout = 66A, 0.73V Thermometer attached to TP = 41.0C Room temp = 24.0C Wednesday, May 24, 2017, 13:16  Vacuum going well. Stable yo-yo-ing at current vacuum limit. TP = 41.5C, RT = 23.9C IG1 = 1.2e-4 Torr TGHT = 71A, 0.77V Increasing vacuum limit stop to 2.0e-4 Torr. Thursday, May 25, 2017, 13:03 Vacuum has stabilized. TGHT = 188A, 1.85V IG1 = 2.2e-5 Torr. Adjusting vacuum limits so when 2nd phase starts, vacuum does not spike. Vacuum limit stop at 5.0e-5 Torr, backing off at 1.0e-4 Torr.    Friday, May 26, 2017, 13:40 Everything tripped off this morning at around 4:30am This was not due to the vacuum spiking as one would expect. No power bumps according to  ISAC controls. Looking back on elogs  [see elog i.d. 145] evap1 had also tripped off during the last round of carbonizing UO2, however last time everything tripped off ~60A. For last trip off the water valve remained open and on. This time  WV1 showed yellow in the TGHT epics box, off under WV epics box, but black [open] in the WV epics box diagram [see screenshot for better understanding]. Water valves are closed - confirmed in person - water wheels not turning. Trip-off occured ~275A. Vacuum was stable at trip-off point; IG1 ~6e-6 Torr  Reason: currently unknown.        Friday, May 26, 2017, 15:43 Starting pumping down again this afternoon while trying to understand trip-off - no progress on that end. IG1 = 4.9e-6 Torr Tapped up to 40A, 0.24V Vacuum spiked to 2e-5 Torr Backed off to 35A, 0.20V Showing lower voltage output than the last round that had tripped off...but ramping is so early on/ low current, hard to tell... Vacuum stable. IG1 = 5.4e-6 Torr Target boat will be ramped up to 275A [trip-off point] at the rate of 0.1A/min. Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.   TP = 37.9C, RT = 25.2C    Monday, May 29, 2017, 08:21 Initially it looks like not enough time had been allowed for the vacuum to settle before initiating the auto-ramp resulting in the vacuum spiking and tripping off the system. A closer look shows that is not the case. Note: the vacuum limits were set to stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.    The TGHT started to back off when the vacuum was ~6e-6 Torr, this is considered a good vacuum and should not have caused the system to initiate backing off yet. Over the course of ~1min, evap1 had backed off all the way down to 0A. At this point the vacuum was now up to ~1.75e-5 Torr and still rising. ~34min after the TGHT had reached 0A, the vacuum eventually reached 8e-4 Torr and tripped off the evaporator. See photos attached.

 Tuesday, May 30, 2017, 07:41

Still unsure as to why evap1 tripped off again.

Put evap1 back under vacuum/ turned turbo pump on and opened isolation valve yesterday afternoon.

Vacuum good this morning...nothing tripped off...

 Tuesday, May 30, 2017, 08:21

IG1 = 2.3e-6 Torr

Tapped up manually to 40A, 0.24V

Waited ~1hr

IG1 = 4.5e-6 Torr

Initiated auto-ramp at 0.2A/min up to a final setpoint of 250A

 Wednesday, May 31, 2017, 09:37

IG1 = 2.4e-6 Torr

TGHT = 250A, 2.57V

Increasing max setpoint to 275A [the trip off point] at a rate of 0.2A/min

Vacuum is currently stable and low; increasing limits to:

Vacuum limit stop at 1.0e-4 Torr, backing off at 5.0e-4 Torr.

 Wednesday, May 31, 2017, 13:39

IG1 = 3.7e-6 Torr

TGHT = 275A, 2.80V

Increasing max setpoint to final setpoint of 520A at a rate of 0.2A/min

Vacuum is currently stable and low; keeping  current limits.

Wednesday, May 31, 2017, 15:57

IG1 = 8.14e-6 Torr

TGHT = 300A, 3.08V

Vacuum stable.

Decreasing ramping rate to 0.1A/min for overnight heating.

turbo pump = 40.5C; room temp = 25.1C

 Thursday, June 01, 2017, 09:00

IG1 = 4.2e-5 Torr

TGHT = 396A, 4.06V

Vacuum stable.

Increasing ramping rate to 0.2A/min.

turbo pump = 41.6C; room temp = 24.3C

 Thursday, June 01, 2017, 13:18

IG1 = 1.25e-4 Torr

TGHT = 439A, 4.48V

Vacuum stable.

Changing vacuum limits.

Vacuum limit stop at 2.0e-4 Torr, backing off at 5.0e-4 Torr.

turbo pump = 42.3C; room temp = 24.6C

 Thursday, June 01, 2017, 15:48

IG1 = 1.95e-4 Torr

TGHT = 467A, 4.81V

Vacuum stable.

Changing vacuum limits and ramping rate for heating overnight.

Decreasing ramping rate to 0.1A/min

Vacuum limit stop at 1.0e-4 Torr, backing off at 5.0e-4 Torr.

turbo pump = 44.1C; room temp = 25.3C

 Friday, June 02, 2017, 07:19

IG1 = 1.26e-4 Torr

TGHT = 473A, 4.77V

Vacuum stable.

Changing vacuum limits and ramping rate.

Increasing ramping rate to 0.2A/min

Vacuum limit stop at 2.0e-4 Torr, backing off at 5.0e-4 Torr.

 Friday, June 02, 2017, 10:18

IG1 = 2.04e-4 Torr

TGHT = 498A, 5.08V

Vacuum stable.

Changing vacuum limits.

Vacuum limit stop at 3.0e-4 Torr, backing off at 5.0e-4 Torr.

Fan has been inserted - pointed at turbo pump, TP temp's have decreased.

tp = 32.1C; rt = 24.7C

 Friday, June 02, 2017, 13:22

IG1 = 2.4e-4 Torr

TGHT = 520A, 5.40V

Vacuum stable and decreasing.

Carbonization process almost complete.

Will remain at max setpoints over the weekend.

TP = 28.2C; RT = 24.5C

 Monday, June 05, 2017, 08:51

IG1 = 1.75e-6 Torr

TGHT = 520A, 5.29V

Carbonization process complete!

Remained at max setpoints over the weekend.

Initiating auto cool at 1.0A/min

 Tuesday, June 06, 2017, 15:56

Vented in Ar and removed today.

Currently in glove box.

 Monday, June 12, 2017, 11:44

Flakes produced: 48.00g

 Monday, June 12, 2017, 11:41

UO2/C green was prepared June 7th, 2017.

The cast peeled off the glass nicely June 8th, 2017.

Initial UO2 powder used = 50.10g (Inventory R-01032A, UO2 + bottle = 776.36g before use)

Graphite powder used = 10.06g

Green cast dried UO2/C + organic mass = 62.98g 

The green was rolled up and wrapped in a piece of graphite sheet.

The Ta-target boat was wrapped with 1 long layer of heat shield [reused from last carbonization] and installed in evap1 this morning.

Chamber pumped down.

Target boat will be ramped up to 520A.

Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.

IG1 = 1.58e-5 Torr

Tapped up to 30A, 0.21V

Waited ~1hr45, vacuum stable.

IG1 = 8.59e-6 Torr

Initiating auto-ramp at 0.1A/min

 Tuesday, June 13, 2017, 10:32

IG1 = 5.0e-5 Torr

TGHT = 65A, 0.47V

Vacuum currently yo-yo-ing, but stable.

Changing vacuum limits.

Vacuum limit stop at 2.0e-4 Torr, backing off at 5.0e-4 Torr.

Increasing ramping rate to 0.2A/min.

Thursday, June 15, 2017, 16:24  

IG1 = 1.96e-4 Torr

TGHT = 520A, 5.18V

TGHT has reached 520A, the vacuum remains at it's limit.

Vacuum usually drops and stabilizes slightly before the max setpoint is reached indicating carbonization process complete.

Since vacuum remains high, this indicates the carbonization remains incomplete.

Conditions have changed such as vacuum limits, which has greatly sped up the process.

This increase in speed could have an impact on the current at which the carbonization occurs.

Increasing max setpoint to 530A and re-initiating auto-ramp.

 Friday, June 16, 2017, 08:32

Vacuum stable, started decreasing when TGHT reached 530A - carbonization process complete.

Evap1 has remained at max setpoints for ~11hrs, but has remained at low vacuum for ~5hrs.

IG1 = 5.56e-6 Torr

TGHT = 530A, 5.31V

Initiating auto-cool at 1.0A/min

TP = 24.9C, RT = 24.3C

*note TP now has water cooling as well as fan pointed at it for this entire process

 Monday, June 19, 2017, 16:16

Vented in Ar and transferred from evap1 to glove box this a.m

UC2 flakes produced = 48.66g

 Wednesday, September 27, 2017, 09:25

UO2/C green was prepared Sept 20th, 2017.

The cast peeled off the glass Sept 22nd, 2017 - not quite enough 'special' ingredient.

UO2 stuck to glass around edges of cast - a lot of flakes produced while peeling off.

Initial UO2 powder used = 50.00g (Inventory R-01032A, UO2 + bottle = 726.38g before use)

Graphite powder used = 10.03g

Green cast dried UO2/C + organic mass = 60.38g 

The green was rolled up and wrapped in a piece of graphite sheet.

The Ta-target boat was wrapped with 3-layers of heat shield [reused from last 1stepUCx] and installed in evap1 yesterday afternoon.

Chamber pumped down overnight.

Target boat will be ramped up to 520A.

Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.

IG1 = 3.5e-6 Torr

Tapped up to 30A, 0.43V

Waited ~50min, vacuum stable.

IGP1 = 8.6e-6 Torr

Initiating auto-ramp at 0.1A/min

 Wednesday, September 27, 2017, 13:28

IGP1 = 1.4e-5 Torr

TGHT = 38.5A, 0.48V

Vacuum stable.

Changing vacuum limits and ramping rate.

Vacuum limit stop at 2.0e-4 Torr, backing off at 5.0e-4 Torr.

Increasing ramping rate to 0.2A/min.

 Thursday, September 28, 2017, 08:41

IGP1 = 3.26e-5 Torr

TGHT = 174A, 1.71V

Vacuum stable.

Increasing ramping rate to 0.5A/min.

 Thursday, September 28, 2017, 09:56

IGP1 = 4.85e-5 Torr

TGHT = 195A, 1.92V

Vacuum initially climbed a small amount with last increase, has started to decrease - vacuum stable.

Increasing ramping rate to 1.0A/min.

Thursday, September 28, 2017, 10:30  

IGP1 = 5.3e-5 Torr

TGHT = 220A, 2.18V

Vacuum increased slightly again with faster ramping rate.

Vacuum now dropping - stable.

Increasing ramping rate to 2.0A/min.

 Thursday, September 28, 2017, 11:07

IGP1 = 6.35e-5 Torr

TGHT = 302A, 3.09V

Vacuum increased slightly again with faster ramping rate.

Vacuum now dropping - stable.

Increasing ramping rate to 2.5A/min.

Thursday, September 28, 2017, 11:45

IGP1 = 1.67e-4 Torr

TGHT = 380A, 4.04V

Vacuum increased normally at slow rate for first half hour.

~30min into the 2.5A/min rate increase, vacuum started to climb much faster.

Paused auto-ramp for few min to allow vacuum to stabilize.

Vacuum decreasing - stable.

IGP1 = 1.4e-4 Torr

Decreasing ramping rate to 0.5A/min for next hour while unable to watch.

 Thursday, September 28, 2017, 13:20

IGP1 = 1.93e-4 Torr

TGHT = 425A, 4.58V

Vacuum stable.

Changing vacuum limits and ramping rate.

Increasing ramping rate 1.0A/min.

Vacuum limit stop at 3.0e-4 Torr, backing off at 6.0e-4 Torr.

 Thursday, September 28, 2017, 14:06

IGP1 = 3.1e-4 Torr

TGHT = 456A, 4.93V

Vacuum stable.

Changing vacuum limits and ramping rate.

Changing ramping rate to 0.5A/ 30sec.

Vacuum limit stop at 4.0e-4 Torr, backing off at 7.0e-4 Torr.

 Thursday, September 28, 2017, 14:44

IGP1 = 4.0e-4 Torr

TGHT = 468A, 5.07V

Vacuum stable.

Changing vacuum limits.

Vacuum limit stop at 5.0e-4 Torr, backing off at 8.0e-4 Torr.

 Thursday, September 28, 2017, 15:49

TP thermocouple = 28.1C

IGP1 = 5.0e-4 Torr

TGHT = 485A, 5.25V

Vacuum stable.

Changing ramping rate for overnight heating.

Decreasing ramping rate to 0.5A/min.

 Friday, September 29, 2017, 09:11

TP thermocouple = 26.1C

IGP1 = 5.0e-6 Torr

TGHT = 520A, 5.60V

Vacuum stable.

Carbonization process complete!

Evap1 has remained at max setpoints for ~13hrs

Initiating auto-cool at 1.0A/min

 Tuesday, October 03, 2017, 10:09

Vented in Ar and transferred from evap1 to glove box yesterday.

 Tuesday, October 10, 2017, 14:11

UO2/C green was prepared Oct 4th, 2017

The cast peeled off the glass nicely Oct 6th, 2017

Initial UO2 powder used = 50.26g (Inventory R-01032A, UO2 + bottle = 676.34g before use)

Graphite powder used = 10.12g

Green cast dried UO2/C + organic mass = 61.30g 

The green was rolled up and wrapped in a piece of graphite sheet.

The Ta-target boat was wrapped with 3-layers of heat shield [reused] and installed in evap1 this morning.

Chamber currently pumping down.

Target boat will be ramped up to 520A.

Vacuum limit stop at 3.0e-4 Torr, backing off at 6.0e-4 Torr.

 Wednesday, October 11, 2017, 09:06

IGP1 = 1.74e-6 Torr

Tapped up to 35A, 0.29V

Waited ~70min, vacuum stable.

IGP1 = 6.9e-6 Torr

Initiating auto-ramp at 0.2A/min

 Wednesday, October 11, 2017, 13:06

IGP1 = 3.1e-4 Torr

TGHT = 61A, 0.49V

Vacuum stable.

Changing vacuum limits.

Vacuum limit stop at 5.0e-4 Torr, backing off at 8.0e-4 Torr.

 Thursday, October 12, 2017, 08:31

IGP1 = 1.06e-5 Torr

TGHT = 275A, 2.55V

Vacuum stable.

Increasing ramping rate to 0.5A/min.

 Thursday, October 12, 2017, 09:03

IGP1 = 1.47e-5 Torr

TGHT = 290A, 2.70V

Vacuum stable.

Increasing ramping rate to 1.0A/ 30sec.

 Friday, October 13, 2017, 08:30

IGP1 = 5.8e-6 Torr

TGHT = 520A, 4.98V

Vacuum stable.

Carbonization process complete!

Evap1 has remained at max setpoints for ~17hrs

Initiating auto-cool at 1.0A/min

 Tuesday, October 17, 2017, 15:01

TGHT had sat at 0A for at least 24hrs.

At ~3:30-4am this morning everything tripped off. The only thing remained on was the roughing pump.

Power bump? Did someone accidentally turn it off? Will follow up on this...

Vacuum was sitting at ~3.5e-2Torr when I noticed today.

Most vacuum had been lost, but there was still a small vacuum - materials should be okay.

Purged and vented in Ar.

Transferred materials to glove box.

 Wednesday, January 10, 2018, 14:44

Circles from cast 1 were used, the same as the last round of 1stepUCx [see elog i.d. 164]

A 14mm punch was used to punch out circles from the cast.

35 circles were packed into a graphite sample container.

35 x UO2/C circles = 5.75 g

Graphite container = 5.38 g

Graphite container is placed inside a target boat.

Boat previously coated with TaC and sintered.

Ta-target boat is wrapped with 3-layers of heat shield and installed in Evap1.

Chamber currently pumping down.

 Monday, January 15, 2018, 13:37

35 circles of 14 mm diameter were packed into a graphite sample container.

35 x UO2/C circles = 5.58 g

Graphite container = 5.22 g

Graphite tube is placed inside a target boat.

Boat previously coated with TaC and sintered.

Ta-target boat is wrapped with 3 new Ta foils for heat shielding and the boat was installed in Evap1.

Chamber currently pumping down.

Tuesday, January 16, 2018, 13:41 

Initial IGP1 = 9x10e-7 Torr

Tapped up entire process manually to 520A in 1.5 hrs

TGHT = 525 A, 5.64 V

Vacuum coming down nicely indicating carbonization process complete 

Will remain at max setpoint overnight to ensure full carbonization before cooling down.

Wednesday, January 17, 2018, 10:30

Initiating auto-cool at 2.0A/min 

Wednesday, January 17, 2018, 4:30

 Thursday, February 01, 2018, 12:59

35 circles of 14 mm diameter were packed into a graphite sample container.

28 discs corresponded to cats#1 and 7 discs to cast#2

35 x UO2/C circles = 3.42 g

Graphite container = 6.96 g

Graphite tube is placed inside a target boat.

Boat previously coated with TaC and sintered.

Ta-target boat is wrapped with 3 new Ta foils for heat shielding and the boat was installed in Evap1.

Chamber currently pumping down.

 Friday, February 02, 2018, 13:18

Initial IGP1 = 4.82x10e-7 Torr

Tapped up entire process manually to 520A in 30 min

TGHT = 520 A, 5.63 V

Vacuum coming down nicely indicating carbonization process complete 

Will remain at max setpoint for 4 hrs to ensure full carbonization before cooling down.

 Friday, February 02, 2018, 16:57

Initiating auto-cool at 2.0 A/min 

Monday, February 05, 2018, 17:23 

Monday, February 05, 2018, 17:24

35 circles from cast#2 of 14 mm diameter were packed into a graphite sample container.

35 x UO2/C circles = 4.59 g

Graphite container = 5.3 g

Graphite tube is placed inside a target boat.

Boat previously coated with TaC and sintered.

Ta-target boat is wrapped with 3 new Ta foils for heat shielding and the boat was installed in Evap1.

Chamber currently pumping down.

 Tuesday, February 06, 2018, 10:59

Initial IGP1 = 4.79e-7 Torr

Tapped up entire process manually to 520A in 30 min

TGHT = 520 A, 5.32 V

Vacuum coming down indicating carbonization process complete.  

Will remain at max setpoint for 4 hrs to ensure full carbonization before cooling down.

 Tuesday, February 06, 2018, 14:44

Initiating auto-cool at 2.0 A/min 

 Thursday, February 08, 2018, 10:43

Vented with Ar and removed from EVAP1

 Tuesday, February 13, 2018, 11:39

35 circles of 14 mm diameter were packed into a graphite sample container.

35 x UO2/C circles = 5.74 g

Graphite container = 5.20 g

Graphite tube is placed inside a target boat.

Boat previously coated with TaC and sintered.

Ta-target boat is wrapped with 3 used Ta foils for heat shielding and the boat was installed in Evap1.

Chamber currently pumping down.

 Tuesday, February 13, 2018, 15:30

Initial IGP1 = 2.73x10e-6 Torr

Tapped up entire process manually to 520 A in 30 min

TGHT = 520 A, 5.41 V

Vacuum coming down nicely indicating carbonization process complete.

Current trip off after 5 min of being at 520 A.

 Wednesday, February 14, 2018, 15:32

EVAP1 vented with Argon and the target was removed.

Target was transferred to glove box.

Ta boat and graphite container look unbroken.

Marla Cervantes wrote:

Tuesday, February 13, 2018, 11:39 35 circles of 14 mm diameter were packed into a graphite sample container. 35 x UO2/C circles = 5.74 g Graphite container = 5.20 g Graphite tube is placed inside a target boat. Boat previously coated with TaC and sintered. Ta-target boat is wrapped with 3 used Ta foils for heat shielding and the boat was installed in Evap1. Chamber currently pumping down.  Tuesday, February 13, 2018, 15:30 Initial IGP1 = 2.73x10e-6 Torr Tapped up entire process manually to 520 A in 30 min TGHT = 520 A, 5.41 V Vacuum coming down nicely indicating carbonization process complete. Current trip off after 5 min of being at 520 A.  Wednesday, February 14, 2018, 15:32 EVAP1 vented with Argon and the target was removed. Target was transferred to glove box. Ta boat and graphite container look unbroken.

 Friday, March 02, 2018, 16:31

A test was performed in EVAP1 (see log ID 194):

- A Ta boat without Ta shielding was submitted to 520 A and it remained at that current point overnight.

-No trip off

Marla Cervantes wrote:

Marla Cervantes wrote:  Tuesday, February 13, 2018, 11:39 35 circles of 14 mm diameter were packed into a graphite sample container. 35 x UO2/C circles = 5.74 g Graphite container = 5.20 g Graphite tube is placed inside a target boat. Boat previously coated with TaC and sintered. Ta-target boat is wrapped with 3 used Ta foils for heat shielding and the boat was installed in Evap1. Chamber currently pumping down.  Tuesday, February 13, 2018, 15:30 Initial IGP1 = 2.73x10e-6 Torr Tapped up entire process manually to 520 A in 30 min TGHT = 520 A, 5.41 V Vacuum coming down nicely indicating carbonization process complete. Current trip off after 5 min of being at 520 A.  Wednesday, February 14, 2018, 15:32 EVAP1 vented with Argon and the target was removed. Target was transferred to glove box. Ta boat and graphite container look unbroken.  Friday, March 02, 2018, 16:31 A test was performed in EVAP1 (see log ID 194): - A Ta boat without Ta shielding was submitted to 520 A and it remained at that current point overnight. -No trip off

 Friday, May 18, 2018, 18:32

35 circles of 14 mm diameter of cast #3 were packed into a graphite sample container.

40 x UO2/C circles = 4.58 g

Graphite container mass = 6.95 g

Graphite tube is placed inside a target boat.

Boat previously coated with TaC and sintered.

Ta-target boat is wrapped with 3 used Ta foils for heat shielding and the boat was installed in Evap1.

Chamber currently pumping down.

Saturday, May 19, 2018, 07:30 

Initial IGP1 = 6.27e-7 Torr

 Tapped to 80A at 10A/10s with 20 s waiting period each 10 A

 Waited 4 min for vacuum to stabilize.

 Tapped to 100 A at 10A/10s with 20 s waiting period each 10 A

 Waited 12 min for vacuum

Tapped to 400 A at 25A/30s with 30 s waiting period each 25 A

Tapped to 520 A at 20A/30s with 30 s waiting period each 20 A

Pressure dropping indicates carbonization complete.

Current tripped off, vacuum was ok, water cooling was ok.

Saturday, May 19, 2018, 10:00 

Current was returned to 520 A manually

Tapped to 100 A at 10A/10s with 20 s waiting period each 10 A 

Tapped to 400 A at 25A/30s with 30 s waiting period each 25 A

Tapped to 520 A at 20A/30s with 30 s waiting period each 20 A