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

Wednesday, January 15, 2025, 18:06

top current = 440A held for four hours

 Wednesday, January 15, 2025, 22:07

setting temperature to 450A

IGP1= 9.0 e-6 Torr

5.5 V was final voltage

Thursday, January 16, 2025, 06:05

IGP1=2.12 e-6 Torr

4.5V, 450A on TGHT

ramp down at -2A/min

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, September 17, 2024, 06:45

Cartridge #20 loaded with 224 discs plus 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 1.5 e-06 Torr

Tuesday, September 17, 2024, 06:47

Starting initial ramp @ 2A/min to 60A

Tuesday, September 17, 2024, 10:05

Started ramp at 1A/min to 90A

Wednesday, September 18, 2024, 07:05

Reduction at 480A held for 4 hours then 8 hours at 450A

Tested by increasing 10A and significant increase in pressure observed (no real peak). 

Started rampdown at -2Amin

Thursday, September 12, 2024, 06:19

Cartridge #19 loaded with 232 discs including 5 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 3.12 e-06 Torr

Thursday, September 12, 2024, 06:20

Starting step one in ramping

Thursday, September 12, 2024, 09:12  

Pressure lowered after passing outgas peak. 

IGP1= 2.5e-05 Torr

will continue with step 2 of ramping

 Thursday, September 12, 2024, 14:46

At 115A outgas peak observed and current ramped down from 120A t 115A.  Allowing pressure to drop before continuing ramp.

Roughing pump issue.  Cooling, turning pumps off until vacuum group can take a look.

Friday, September 13, 2024, 14:39

Roughing pump seems ok.  Restarting ramp at 1A/min to 115A

Friday, September 13, 2024, 17:38

Starting ramp up at 2A/min to 520A (will monitor pump and outgassing)

Saturday, September 14, 2024, 07:44

inflection point at aroung 450A

Saturday, September 14, 2024, 07:48

pressure started dropping at 466A, but some sporadic peaks observed.  Will heat to 488A and leave for 4 hours

Saturday, September 14, 2024, 20:23  

 ramping down after 8 hour conditioning

IGP1= 2.45e-06 Torr

 Tuesday, April 09, 2024, 14:42

Cartridge #16 loaded with 213 plus 3 analysi 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 2.4 e-06 Torr

Tuesday, April 09, 2024, 14:42

Start ramp @2A/min to 120A then wait for pressure drop to continue.

Tuesday, April 09, 2024, 16:51

Set ramp to 2A/30s to 480A

Wednesday, April 10, 2024, 00:02

Ramping down to 450 A

Thursday, April 11, 2024, 09:56

Cool down Wednesday morning

Will be left under vacuum in EVAP1 due to hotlab closure.

Evaporator was cleaned Nov 11 from after target was conditioned up to 175A. There was significant condensation of oily fluid on the left side where the target container was open (D-shaped end cap). There were also deposits in the hole for the ionizer, but the ionizer itself seemed to be clean.

 Friday, October 11, 2013, 18:00

The target container was previously coated with TaC and sintered in Evap 2.

The target is loaded with ??? discs of UCx (material from batch #???)

Total length = ???

The container is wrapped with 3 layers of Ta-heat shield, including the back block.

A regular TaC coated / sintered endcap is inserted on left, wrt the ionizer tube pointing out of the page. The right end is open with no cap.

The chamber is pumping down.

Instructions for conditioning the UCx target:

1. TGHT will need to heat up to ~ 175A to burn off the organics.

    Parameter setup: 5.0e-5 good vac, 6.0e-5 bad vac. The auto-ramping rate is set to 0.1A/min.

2. Once the organics have burnt off, ramp down the TGHT to 0A at 2A/min.

3. Purge the glovebox with argon gas.

4. Vent the chamber with Ar gas. Close the valve when it is completely vented.

5. Remove the target. Be careful the left end (view from the top) is open with the D-cap.

6. Clean the chamber with TCE and remove all the gunge.

7. Install the target back

8. Pump down the chamber to at least low 10e-6 Torr before begin the final carbonization process.

9. Auto-ramp the TGHT current to 175A at 1A/min.

10. Once the TGHT reach to 175A. Auto-ramp TGHT to 520A at 0.1A/min.

11. At 520A, keep heating the target for at least 4-5 hours.

12. Auto ramp TGHT to 0A at 2A/min.

13. Purge the glovebox with argon for at least 5 min.

14. Vent the chamber with argon gas. Close the valve when it is completely vented.

15. Remove the target from the chamber and put in the "orange james bond box" and transport to the Ar-glove box.

Tuesday, July 10, 2012, 12:44

Target contains 230 discs of UCx (material from UC2 flakes, batch#01-04062012). 

Total UCx mass (UC2 + C-grv extra + C-foil + Org.) = 38.564g

Total length = 8.0 cm

Target was previously contained with TaC and sintered;  it's wrapped with 3 layers of Ta-heat shield, including the back-block.

A regular TaC-coated endcap is inserted on one end and the other is inserted with a D-cap with two samples  (Marked sample #1 & #2).

The chamber is currently being pumped down.

 Tuesday, July 10, 2012, 19:06

IG currently at 9.1e-6 Torr, BP @ 22mTorr.  

Set TGHT auto-ramping parameters:  

Vacuum limit 5.0 e-6 Torr, (max 6.0 e-6 Torr)

rate = 0.25A/min

TGHT = 55A  

Initiated auto-ramping...

 Tuesday, July 10, 2012, 23:20

TGHT reached to 55A and stayed for about 55min.  The pressure was at 2.5e-5 Torr.

Increases TGHT auto-ramping to 175A to allow burning off most of the organic binder, and the chamber will be vented and cleaned before ramping 

up the heater to 520A.

Ramping rate set to 0.1A/min.

Monday, July 16, 2012, 09:44 

TGHT reached to 175A.  It has taken almost 6 days to burn off the organic binder. (see attachment #1).  

Auto-cool down has initiated.  The chamber will be vented with Ar gas and it will be opened for cleaning of the burn-off binder. 

 Monday, July 16, 2012, 14:20

The chamber was vented with Ar, and the target was removed for cleaning.  There was quite a bit of organic gunge filled the ionizer holder-base plate and condensation out the D-cap (as usual).

The chamber was cleaned and the target was installed back.  It's currently being pumped down.

Once the vacuum reached to 10e- Torr.  The heater will be ramped up to max 520A to finish the sintering process.

 Monday, July 16, 2012, 17:01

Pressure has reached to 9.1e-6 Torr. 

Initiated auto-heating at 1A/min.  Set TGHT = 175A.

 Monday, July 16, 2012, 20:00

TGHt reached to 175A.  Pressure stable at 2.2e-5 Torr.  

Increase target heater to 520A; autoramping at 0.1A/min. 

 Thursday, July 19, 2012, 10:27

TGHT reached to 520A, 5.47V (local 516A, 5.36V) and has stayed for about 4 hours.  IG1 = 9.58e-6 Torr and coming down.  BP=29mTorr.

Thursday, July 19, 2012, 10:29

Auto-cooling down in process...  2A/min for TGHT --> 0A.

 Thursday, July 19, 2012, 16:52

The chamber was vented with Ar gas, and the target was transported to the Ar-glove box. 

The samples were removed from the target.

A new TaC-sintered end-cap was inserted.

The target looks good!

Total time for the conditioning process = 9 days.

See attachment#2 for the overall heating/pressure curves.

 Thursday, November 03, 2011, 08:59

Target was previously coated/sintered with TaC & wrapped with 3 Ta-heat shields, including the back-block. 

Target was loaded with 365 UC2 discs + 3 samples for analysis. 

One regular endcap and one D-cap on the other end where the 3 samples sit. 

Evaporator has been pumped down since last night.  Currently vac @ 2.0e-6 Torr.  

For this final conditioning, here are the instructions: 

1.  Slowly stepping up TGHT  to 100A to burn off the organic binder.  Vacuum is expected to rise to the limit and stay at the plateau for a few days.  

2.  Once the vacuum has come down, the target will be cooldown and the chamber will be vented with Ar.  The cup-holder may be filled with the organic binder and needed to be clean.

3.  Pump back down the evaporator; step up TGHT to 100A and wait for the reaction. 

4.  Initial TGHT auto ramping.  Set TGHT to 520A @ rate of 0.1A/min.  

5.  Allow TGHT to held at 520A for 4 hours, then cool down. 

6.  Remove target from the chamber and store in the air-tight box and transferred to the Ar-glove box. 

Thursday, November 03, 2011, 09:13 

TGHT reached to 55A, and vacuum slowly to rise. Vac @ 5.7e-6 Torr. 

Wil stay at 55A for now... 

 Thursday, November 03, 2011, 09:51

A spike in vacuum and triggered the alarm handler but didn't tripped the TGHT.

Brought TGHT back down to 50A.

Initiated Auto-heating.  Set TGHT to 100A @ 0.1A/min. 

Thursday, November 03, 2011, 18:25  

I just found out that the target heater did not reach to 100A.  The auto-heating was running to bring up TGHT to 100, but the readback stayed at 50A.  Peter K. was contacted.  We stopped the auto-heating program and instantly the target heating jumped to 100A.  Quickly, we brought down the heater to 50A.  (see attachment1 for the stiptool).  Not sure what was happening.  

I stepped up the TGHT manually to 61A, and the pressure is slowing increasing.  

Thursday, November 03, 2011, 19:26  

Something is wrong with the TGHT power supply.  I stepped it up from 55 to 63A, and found the readback stuck at 58 (local @ 56).  So, I tapped the TGHT down to 58A and then the readback followed the setpoint.

I tried again to bring it up to 63 and it stuck at 60A, and tapping down and up the slider triggered the readback to follow the setpoint.  This is a fault in the system. 

Peter was informed, and is taking over this for now.  We need to bring up the THGT up to 100A to burn off the organic binder.  I don't know what we should do from here.  I need a break! 

Friday, November 04, 2011, 15:46  

As per Jane,  there is a problem with the network issue that controls the target heater power supply.  The power supply current is not regulating proper.  (see attachment #2)

TGHT was ramped down from 85A to 0A for Control to work on the problem since this morning.  

See e-fault#5672, WP#2011-11-04-5. 

 Monday, November 07, 2011, 11:12

 Control has fixed the network issue.  

Stepped up to 10A, local read 8A.

 Initiated autoramping, setp TGHT to 20A at 1A/min.  TGHT did reach to 20A with no problem.  

Stepped up further to 30A, local at 28A.  

I conclude that the power supply is now regulating properly.  

Conditioning of UCx#3 continues... 

 Monday, November 07, 2011, 12:14

TGHT at 84.5A, locat @ 82A.  Vacuum hovering at 7.2e-5 Torr.  

Initiated auto-ramping: TGHT set to 100A, at 0.1A/min.  Incrementing current if vac < 5.0e-5 Torr and backing off if vac >6.0e-5 Torr. 

Monday, November 14, 2011, 11:03 

TGHT reached to 175A on Nov 11, 2011 to finish off the organics burnout process. 

Then TGHT was cool down @ 2A/min until TGHT reached to zero.

Evaporator was vented with Ar and the chamber was open.

The target was removed from the evaporator; the organic binder was condensed out from the D-endcap and some from the ionizer tube (See attachment 3 & 4).

One of the samples was retrieved for analysis, and the D-endcap was put back.

The target was installed back, and the chamber was pumped down. 

The sintering and thermal reduction processes continued with TGHT ramped up to 520A.  Heating rate @ 0.1/min. 

Target has been heated at 520A for ~5hrs, vac @ 5.35e-6 Torr. (see attachment 5). 

Wednesday, November 16, 2011, 13:42

 Target looks good.  It has been installed in the heatshield, and it's being stored in the Ar-golve box. 

Evaporator is now off.  

 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! 

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.

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

 Thursday, September 23, 2021, 06:55

A loaded graphite cartridge was set in a tantalum boated and wrapped with 3 tantalum sheets (Wednesday September 22)

IGP1 = 3.6 e-5 Torr

Good vacuum = 5e-2 Torr

Bad vacuum = 5e-1 Torr

Current ramp is 2A per min from 0A to 120A and 1A/10s from 120A to (450-550A)

Thursday, September 23, 2021, 07:09 

IGP1 = 1.84 e-06 Torr

Start Autoramp to 120A @ 2A/min 

Thursday, September 23, 2021, 10:25

Start Autoramp to 550A @ 1A/10s

 IGP1= 1.05e-05 Torr

TGHT= 120 A, 1.06 V

Thursday, September 23, 2021, 11:57 

Pressure drop observed at 530A.  Start 4 hour count.  

Thursday, September 23, 2021, 15:57 

IGP1= 9.1e-06 Torr

After 4 hour reduction started rampdown to 400A at 2A/30s.

8 hour conditioning to start at 16:15 pm

Friday, September 24, 2021, 00:16

TGHT= 399.8 A, 3.5V

IGP1= 2.4 e-06 Torr 

Start ramp down at 2A/min

Target #34 was installed in the EVAP1 and pumped down (Tuesday June 29, 2021).

Target #34 is going to be conditioned on a Ta boat wrapped with 3 Ta foils.

IGP1 = 1.85e-6 Torr

Good vacuum = 1e-1 Torr

Bad vacuum = 5e-1 Torr

Power desired 1.6kW. This is the second target conditioned this way. 

Subsequent targets should be conditioned following thermal reduction.

 Thursday, July 01, 2021, 06:05

IGP1= 1.35e-06 Torr

Start autoramp @2A/30s to 400A

Thursday, July 01, 2021, 07:59

Pressure increase was observed near 400A 

will ramp to 450A and  keep for 8 hours

IGP1= 1.4 e-05 Torr

450A and 4.0V reached at 8:14 am on Thursday July 01, 2021

Rampdown @-2A/min was started at 4.14 pm on Thursday July 01, 2021 IGP1 stable at 2.7e-06Torr

Cannot transfer into glovebox yet because moisture is a bit high after regeneration.  Moisture is dropping. Will wait until moisture is sufficiently low.

Monday, July 05, 2021, 20:43

Cartridge was removed and placed in bag inside glovebox

Removed 10 discs for analysis but might place them back inside depending on final decision.  We had previously removed 10 discs after thermal reduction.

Wednesday, June 03, 2020, 08:11 

A loaded graphite cartridge was set in a tantalum boated and wrapped with 3 tantalum sheets (Friday May 29, 2020)

The set up was installed in the EVAP1 then IEVAP:IGP1 was replaced (elogs 260 and 261).  

Vacuum was turned on after Ion Gauge swap.

IGP1 = 3.6 e-5 Torr

Good vacuum = 5e-2 Torr

Bad vacuum = 5e-1 Torr

Current ramp is 1A per 10s from 0A to 120A

Wednesday, June 03, 2020, 09:59 

After about 20 minutes at 120 A, TGHT tripped again exactly as before.

Will restart ramp at 1A per 10s from 0A to 120A .  Will set good vacuum to 1e-2 Torr

IGP1= 4.3e-05 Torr

Wednesday, June 03, 2020, 10:57

IGP1 =  9e-4 Torr

Pressure peaked around 4e-3 Torr and now trending down

TGHT =120 A

Wednesday, June 03, 2020, 11:23

IGP1=9.5e-5 Torr

Good Vacuum 1e-02 Torr

Bad Vacuum 5e-1 Torr

Starting TGHT ramp to 550 A at 3A per 10s  

Wednesday, June 03, 2020, 14:41

ramp up was good.  TGHT at 550 A since 12:30 pm.  TGHT did not trip. *note adjusted good vacuum.  Ramping takes a little longer but doesn't trigger TGHT shutdown.

Wednesday, June 03, 2020, 22:55

IGP1 =  3.5e-5 Torr

TGHT = 249.4 A, 5.7 V

Start ramp down at -2A per minute to 0 A

 Saturday, June 05, 2021, 08:57

Target #33 was installed in the EVAP1 and pumped down yesterday (Friday 4).

Target #33 is going to be conditioned on a Ta boat wrapped with 3 Ta foils.

IGP1 = 3.85e-6 Torr

Good vacuum = 1e-1 Torr

Bad vacuum = 5e-1 Torr

Power desired 1.6kW. This is the first target conditioned this way, 

Saturday, June 05, 2021, 09:13

Current ramp is 2A/30s to 400 A

Saturday, June 05, 2021, 10:59

TGHT = 3.5V, 399.7 A, 1.4 kW

IGP1 = 4.4e-5 Torr

Saturday, June 05, 2021, 11:00  

Current ramp is 2A/30s to 450 A

Saturday, June 05, 2021, 11:14

 TGHT = 4.06 V, 451.584 A, 1.4 kW

IGP1 = 4.86e-5 Torr

Saturday, June 05, 2021, 11:15 

Current ramp is 2A/30s to 500 A

Saturday, June 05, 2021, 11:23

TGHT = 4.23 V, 467.2 A, 1.97 kW pressure was still increasing a little at 1.6kW

IGP1 = 4.86e-5 Torr

Saturday, June 05, 2021, 19:10

 TGHT = 4.08 V, 459.52 A, 

IGP1 = 6.4e-6 Torr

Initiate ramp down  at 2 A/min to 0A

 Tuesday, May 26, 2019, 18:20

A loaded graphite cartridge was set in a tantalum boated and wrapped with 3 tantalum sheets (Friday May 22, 2020)

The set up was installed in the EVAP1 and pumped down during the weekend.

IGP1 = 7.10 e-7 Torr

Good vacuum = 1e-1 Torr

Bad vacuum = 5e-1 Torr

Current ramp is 1A per 10s from 0A to 120A

 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.

Monday, October 28, 2019, 10:29

A loaded graphite cartridge was set in a tantalum boated and wrapped with 3 tantalum sheets

The set up was installed in the EVAP1 and pumped dwon during the weekend.

IGP1 = 1.10 e-6 Torr

Monday, October 28, 2019, 10:31

Good vacuum = 1e-1 Torr

Bad vaccum = 5e-1 Torr

The current ramp is 1 A each 10 s from 0 A to 100 A

Monday, October 28, 2019, 11:13 

After 18 min the pressure started dropped.

Monday, October 28, 2019, 11:22 

When the pressure reduced to 5e-4 Torr the current ramp was changed to 3.3 A each 10 s to 480 A, the vacuum limits stayed the same.

Monday, October 28, 2019, 11:45

The limit was set to 500 A with same ramp

Monday, October 28, 2019, 11:48 

The ramp was changed to 1A/10s to 550 A

 Monday, October 28, 2019, 11:55

At 520 A the pressure reach 1e-1 Torr and the autoramp stopped

Monday, October 28, 2019, 13:39

the current was increased manually at aprox. 1A/30 s 

The current dropped suddenly even though the pressure was under the limits and the ramping was in the limits.

Autoramp was set to 3 A/ 10 s from to to 500 A

Then it was changed to 1 A  /30s from 500 to 506 A

Finally it was changed to 1 A/ 10 s from 506 to 520 A

Manually tapped to 530 A

Monday, October 28, 2019, 15:40

At 13:45 the current reached 530 A. 

Marla Cervantes wrote:

Monday, October 28, 2019, 10:29 A loaded graphite cartridge was set in a tantalum boated and wrapped with 3 tantalum sheets The set up was installed in the EVAP1 and pumped dwon during the weekend. IGP1 = 1.10 e-6 Torr Monday, October 28, 2019, 10:31 Good vacuum = 1e-1 Torr Bad vaccum = 5e-1 Torr The current ramp is 1 A each 10 s from 0 A to 100 A Monday, October 28, 2019, 11:13  After 18 min the pressure started dropped. Monday, October 28, 2019, 11:22  When the pressure reduced to 5e-4 Torr the current ramp was changed to 3.3 A each 10 s to 480 A, the vacuum limits stayed the same. Monday, October 28, 2019, 11:45 The limit was set to 500 A with same ramp Monday, October 28, 2019, 11:48  The ramp was changed to 1A/10s to 550 A  Monday, October 28, 2019, 11:55 At 520 A the pressure reach 1e-1 Torr and the autoramp stopped Monday, October 28, 2019, 13:39 the current was increased manually at aprox. 1A/30 s  The current dropped suddenly even though the pressure was under the limits and the ramping was in the limits. Autoramp was set to 3 A/ 10 s from to to 500 A Then it was changed to 1 A  /30s from 500 to 506 A Finally it was changed to 1 A/ 10 s from 506 to 520 A Manually tapped to 530 A Monday, October 28, 2019, 15:40 At 13:45 the current reached 530 A.

The final pressure was IGP1 = 3.3e-6 Torr 

After 18 hrs at maximum temperature the autoramp was set to -2 A/min to 0 A.