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.

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

 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, September 24, 2021, 15:38

Full target loaded with ~500 non-active foils plus 4 active foils.  

Initial pressure when heating: 6.6E-5 T 

Manually went to:

TGHT=125 A 

TBHT=50 A

with increments of 5 A each. Pressure has little spikes but mostly unchanged (going down, actually).

Friday, September 24, 2021, 15:42

Manually went to

TGHT=180 A 

TBHT=80 A

Pressure going up steadily, max pressure <2E-4

Friday, September 24, 2021, 16:48

From TGHT=180 A, TBHT=80 A we are aiming at going to TGHT=580 A and TBHT=230 A in increments of 50 A each and leave it there for a total of 5 minutes after nominal parameters are reached. Initial pressure 1.3E-5 T.

Friday, September 24, 2021, 17:01

Fast rampup done, we were up there in 30 seconds.

TGHT VOL = 6.6 V

TBHT VOL = 3 V

Max pressure 2E-3 T. Both TGHT and TBHT were shut off abruptly on purpose. 

 Friday, November 05, 2021, 13:23

Full target loaded with ~500 non-active foils plus 4 active foils.  

Initial pressure when heating: 1.6E-5 T 

Manually went to:

TGHT=125 A 

TBHT=50 A

with increments of 5 A each. Pressure has little spikes but mostly unchanged (going down, actually).

Stayed at those values for 2 min 

Friday, November 05, 2021, 13:37 

Manually went to

TGHT=180 A 

TBHT=80 A

maximum pressure 6.6e-5 Torr

Friday, November 05, 2021, 13:43

IGP1 =  2.45e-5 Torr

We are aiming at going to TGHT=580 A and TBHT=230 A in increments of 50 A each and leave it there for a total of 5 minutes after nominal parameters are reached 

Friday, November 05, 2021, 13:55

IGP1 =  1.7e-5 Torr

Heating done, we stayed at 530A for a bit long (~15 sec) during the heating so the total heat time at 580A was interrupted at 4 mins 50 seconds instead of 5 mins. All good, max pressure during the heating was 0.013 T.

Friday, October 07, 2022, 07:55

Cartridge-220928UCx was installed in the EVAP1 and pumped down yesterday.

Material will be reduced in LP-SIS wrapped with 3 Ta foils.

IGP1 = 2.1e-6 Torr

a cap was installed to collect material coming out from the ionizer tube

The initial weight of the cap 1 + small bag was recorded to be: 2.82 g   Final weight of cap1 + small bag = 2.84g (see attached picture)

Good vacuum = 5e-4 Torr

Bad vacuum = 5e-2 Torr

Power desired 1900W as approximate power used online. 

Will autoramp @2A/min to 30A, then slow down ramp to 1A/min to 120A.

After first pressure bump cleared, will ramp up to 400 A @ 2A/20s to 425A on TGHT.  TBHT will be topped off at 230A. 

from 425A, TGHT will be ramped at 1A/min and monitored for pressure behaeviour. 

sytem will be left at reduction current for 4 hours.  Then, the current will be dropped to 1900W and allow to run for 8 hours.

The cup will be collected and the system will be run again in increments of two hours. 

*slight change from test plan to save time*

Friday, October 07, 2022, 21:55

A true pressure max was not observed.  A max while current still rising.  stopped at 560A on TGHT and 5.3V

will leave at the above conditions for 4 hours.

Suspect that the thinner Ta shields make a difference.  Suggest to add a fourth shield and process the previous cartridge in a tube rather than a boat.  Treat for four hours (pressure max) and then test increasing the current to see if there is a pressure bump.  If no pressure bump then lower current to deposit 1900W for 8 additional hours. 

After 4 hours at max current, the current was dropped to 450A (TGHT) and left for 8 hours.

Saturday, October 08, 2022, 09:26

start autoramp down @-2A/min for TGHT and -1A/min for TBHT

Cap+ bag = 2.82 g

final cap +bag = 2.84 g

Tuesday, October 11, 2022, 10:15

Today will switch end-cup.  Will weigh new end-cup and place inside the evap1 glovebox.  Then will remove used end-cap and install new end-cap.  Used end-cup will be weighed on same balance as before.  All mass measurements will be done with the same balance. Note, that a makeshift balance air isolation container was built to allow balance to not be affected by air currents.

 Cap 2+bag initial weight = 2.80 g +/- 0.01 g

Cap 2+bag final weight = 2.81g +/- 0.01 g

No visible deposition on cap

Wednesday, October 12, 2022, 07:51

Start ramp up at 2A/min.  TGHT to 450A, TBHT to 230A

IGP1= 6.7e-07Torr

Wednesday, October 12, 2022, 09:47

Ramping up @ 4A/min to same final settings: TGHT = 450A and TBHT = 230A

Wednesday, October 12, 2022, 11:15

@10:45am 450A, 4.15V were reached on TGHT

Will leave for 2 hours at 450A then ramp down, then switch cap. 

Monday, October 17, 2022, 09:40

The second cap was taken out over the weekend  (attachment number 2).

The final weight of this cap with bag = 2.81 +/- 0.01 g

Installed a nex cap (3) with initial weigh of cap +bag = 2.74 g

Allowed vacuum to settle over Sunday and will start ramping today

Will ramp to 470 A and hold for 2 hours.  Ramp rate  2A /30s

IGP1= 4.6e-07 Torr

 Monday, October 17, 2022, 11:39

ramping with no issues.  will finish ramp around 12:03 pm and will start rampdown @ around 2:05 pm.

Monday, October 17, 2022, 12:03

TGHT= 470A, 4.5V

TBHT= 228A, 2.9V

IGP1= 5.6e-06 Torr

Monday, October 17, 2022, 14:05

Start rampdown at 2A/min TGHT and 1A/min TBHT to zero amp

current IGP1= 2.6e-06 Torr

TGHT = 470A, 4.5V

TBHT= 228.3A, 2.9V

Tuesday, October 18, 2022, 09:39

IGP1=4.4e-7 Torr

ready to dismount

Tuesday, October 18, 2022, 13:50

Cap 3 + bag initial weight = 2.74 g

Final weight of cap+bag = 2.74 g (no change)

no visible deposition on cap either

Monday, November 28, 2022, 05:58

Left weekend to pump down

current IGPI= 7.23e-7 Torr

Material will be reduced in LP-SIS wrapped with 3 Ta foils.

a cap was installed to collect material coming out from the ionizer tube

Initial weight of target material plus cartridge was recorded

All relevant data and findings will be reported and added to docushare as document :

Good vacuum = 5e-4 Torr

Bad vacuum = 5e-2 Torr

Power desired 1900W as approximate power used online. 

Will autoramp @2A/min to 30A, then slow down ramp to 1A/min to 120A.

After first pressure bump cleared, will ramp up to 400 A @ 2A/20s to 425A on TGHT.  TBHT will be topped off at 230A. 

from 425A, TGHT will be ramped at 1A/min and monitored for pressure behaeviour. 

sytem will be left at reduction current for 4 hours.  Then, the current will be dropped to 425 A and allow to run for 8 hours.

The cup will be collected and the system will be run again for two hours. at the same current until no material visible on cap.  Then it will be run at 450A for increments of two hours until no significant mass change of target material.

Monday, November 28, 2022, 06:05

started initial heating to 30A at 2A/min on both TGHT and TBHT.

Monday, November 28, 2022, 08:46

was ramping at 6A/min (2A/20s) on both tGHT and TBHT but aborted due to pressure spike.  will allow pressure to stabilize.

TGHT = 162A, 1.35V

TBH 162A, 1.9V

Monday, November 28, 2022, 08:51

Restarting the heating at 6A/min (2A/20s)

Monday, November 28, 2022, 09:21

Pausing heating @ TGHT= 323 A 3.0V

Allow pressure to stabilize to better spot reduction current

Monday, November 28, 2022, 09:49

Started heating TGHT at 2A/min so reduction current can be better resolved

Monday, November 28, 2022, 10:12

heating aborted to allow pressure to stabilize

IGP1> 5.0e-4 Torr

Monday, November 28, 2022, 11:31

IGP1= 1.5e-4 Torr start autoramp TGHT @1A/min

Monday, November 28, 2022, 11:51

paused heating.  Second peak has been passed.  Will let pressure drop before starting heating again to try and better observe reduction peak.

Monday, November 28, 2022, 12:46

start autoramp at 2A/min from 389A on TGHT

IGP1- 6.4e-6 Torr

Monday, November 28, 2022, 14:21

Pressure starts to drop at around 535A, but large bump observed around 386A. 

Will leave four hours. 

TGHT= 539A, 4.98V

TBHT= 229A, 2.9V

Monday, November 28, 2022, 18:19

Ramping down at 4A/min to 425A

Currently IGP1= 6.2e-6 Torr

TGHT = 539A, 4.98 V

TBHT= 230A, 2.98V

Monday, November 28, 2022, 22:23

425 A on TGHT reached at 6:50 pm.  Will ramp down at 2:50 am .  -2A/min TGHT and -1A/min TBHT

Tuesday, November 29, 2022, 09:34

Final IGP1 when TGHT and TBHT = 0A  is 5.0e-7 Torr

Tuesday, November 29, 2022, 14:08

Weighed materials and reloaded

Currently at 1.1 e-05 Torr

Will initiate heat ramp at 2A/min to 425 A

@241A increase ramp rate to 4A/min on TGHT

Wednesday, November 30, 2022, 12:44

heating B finished and cartridge loading for heating C

Current pressure = 2.09 E-05 Torr.  Will ramp up to 450A at 4A/min and regulate as needed.

Will heat at 450A TGHT for 2 hours, TBHT max= 230A

Wednesday, November 30, 2022, 16:30

Starting rampdown @-2A/min TGHT and -1A/min TBHT

Final heating was @ 450A, 4.0V TGHT and 230A, 2.7V TBHT

Friday, December 02, 2022, 09:00

IGP1= 7.2 e-07 Torr

Starting ramp at 2A/min to 450A on TGHT and 230A on TBHT

Friday, December 02, 2022, 10:02

pressure stated dropping.  Will increase ramp to 4A/min (2A/30s)

Friday, December 02, 2022, 15:35

Starting ramp down at -2A/min TGHT and -1A/min TBHT

IGP1= 2.6 e-06 Torr

TGHT 450A   4.2V

TBHT  230A  2.9V

 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, 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

 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.

 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.

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

 Tuesday, February 14, 2012, 20:58

Evaporator is setup for UO2/Nb sintering process.  

Target oven filled with 402 discs of UO2/Nb, 5.0cm in length with tot mass of 61.49g. 

The chamber has been pumped down for 7 hrs, vac is currently at 4.6e-6 Torr. 

Parament set as follow, see attachment 1. 

 TGHT ramped up to 57A.  Pressure is stabilizing at 3.8e-5 Torr.  

Auto heating initiated.  0.1A/min.  Max TGHT = 500A. 

Sunday, February 19, 2012, 11:41 

TGHT has stayed at 500A for >10hrs,  Vac levels at 2.9e-6 Torr.

Target cool down initiated @ 2A/min.

 Monday, February 20, 2012, 10:23

Target has been cooled down over the weekend.  Vac currently at 5.77e-7 Torr.  

See attachment#2: UO2_Nb_1_striptool.jpg 

Chamber  vented in atmosphere.   

Monday, February 20, 2012, 16:23 

Pumps/ power supplies off. 

 Tuesday, November 07, 2017, 14:34

LP-FEBIAD used several years ago for temperature measurements is used for this test.

3xTa heat shields on container, incl center block - these heat shields have remained on there since the last round of tests in 2014?

Old version of LP container with larger center block.

Will heat TBHT to 290A and report data.

Loaded into evap1 and pumped down this a.m

IGP1 = 7.73e-6 Torr

Wednesday, November 08, 2017, 13:20

Tapped up to 290A manually.

TBHT epics controls = 287.7A, 2.45V

TBHT power supply = 290.4A, 2.46V

IGP1 epics = 2.51e-6 Toor

IGP1 direct readout = 3.18e-6 Torr

TP = 26.1C

Initiating auto-cool at 2.0A/min

 Thursday, November 09, 2017, 11:41

Vented in air.

TBHT test went well. 

See attachment for data collected.