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.

Thursday, October 11, 2018, 18:06

Target consists of 284 UCx discs, total packing length of 8.0 cm. 

Container was previously coated/sintered with TaC (see elog #417) in Evap#2 with TGHT set to 400A and TBHT 230A, but there was a problem with the readback.  Will ramp up TGHT to 400A to see if the carbonization is complete; if not, additional 50A on TGHT can be applied.

One end-cap is inserted on the right, wrt to the ionizer, and left end is open. 

Vacuum initial setting:

Good Vac = 5.0 e-5 Torr, Bad vac = 8.0 e-5 Torr.

pressure level will be monitored accordingly...

Auto-ramping setting

TGHT: 60 wait time, 0.2A/min, final 400A (or addtional of 50 A if required as mentioned above)

TGHT: 60 wait time, 0.2A/min, final 230A.

 Chamber is currently being pumped down.

 Friday, October 12, 2018, 15:35

Chamber has pumped down to 1.8e-6 Torr. 

Stepping up TGHT and TBHT to 40A.

 Friday, October 12, 2018, 17:07

TGHT/TBTH was held at 40A reaching max pressure of 1.7e-5 before slowly coming down. 

Initiated autoramping.

 Thursday, October 18, 2018, 11:10

TGHT reached to 400A/3.98V, pressure is coming down from the upper limit at around 320A which indicated the carbonization is approaching to completion (see attachment#1).  However, two more out-gassing steps are typically observed as TGHT reached around 450 A (see previous UCx conditioning process).  Currently the pressure is at 1.04 e-5 torr. 

Auto-ramping TGHT to 450A at 1A/min, continue to observe the vacuum...

 Thursday, October 18, 2018, 12:57

TGHT reached to 450A/4.6V. Pressure is coming down from 1.6 e-5 Torr. (see attachment#2).  Will remain at this heating current until pressure reached to mid 10-6 torr.

John Wong wrote:

Thursday, October 11, 2018, 18:06 Target consists of 284 UCx discs, total packing length of 8.0 cm.  Container was previously coated/sintered with TaC (see elog #417) in Evap#2 with TGHT set to 400A and TBHT 230A, but there was a problem with the readback.  Will ramp up TGHT to 400A to see if the carbonization is complete; if not, additional 50A on TGHT can be applied. One end-cap is inserted on the right, wrt to the ionizer, and left end is open.  Vacuum initial setting: Good Vac = 5.0 e-5 Torr, Bad vac = 8.0 e-5 Torr. pressure level will be monitored accordingly... Auto-ramping setting TGHT: 60 wait time, 0.2A/min, final 400A (or addtional of 50 A if required as mentioned above) TGHT: 60 wait time, 0.2A/min, final 230A.  Chamber is currently being pumped down.  Friday, October 12, 2018, 15:35 Chamber has pumped down to 1.8e-6 Torr.  Stepping up TGHT and TBHT to 40A.  Friday, October 12, 2018, 17:07 TGHT/TBTH was held at 40A reaching max pressure of 1.7e-5 before slowly coming down.  Initiated autoramping.  Thursday, October 18, 2018, 11:10 TGHT reached to 400A/3.98V, pressure is coming down from the upper limit at around 320A which indicated the carbonization is approaching to completion (see attachment#1).  However, two more out-gassing steps are typically observed as TGHT reached around 450 A (see previous UCx conditioning process).  Currently the pressure is at 1.04 e-5 torr.  Auto-ramping TGHT to 450A at 1A/min, continue to observe the vacuum...  Thursday, October 18, 2018, 12:57 TGHT reached to 450A/4.6V. Pressure is coming down from 1.6 e-5 Torr. (see attachment#2).  Will remain at this heating current until pressure reached to mid 10-6 torr.

 Friday, October 19, 2018, 10:00

TRIUMF had a total power outage, the TBHT  and TGHT current had been ramped down already.

Marla Cervantes wrote:

John Wong wrote: Thursday, October 11, 2018, 18:06 Target consists of 284 UCx discs, total packing length of 8.0 cm.  Container was previously coated/sintered with TaC (see elog #417) in Evap#2 with TGHT set to 400A and TBHT 230A, but there was a problem with the readback.  Will ramp up TGHT to 400A to see if the carbonization is complete; if not, additional 50A on TGHT can be applied. One end-cap is inserted on the right, wrt to the ionizer, and left end is open.  Vacuum initial setting: Good Vac = 5.0 e-5 Torr, Bad vac = 8.0 e-5 Torr. pressure level will be monitored accordingly... Auto-ramping setting TGHT: 60 wait time, 0.2A/min, final 400A (or addtional of 50 A if required as mentioned above) TGHT: 60 wait time, 0.2A/min, final 230A.  Chamber is currently being pumped down.  Friday, October 12, 2018, 15:35 Chamber has pumped down to 1.8e-6 Torr.  Stepping up TGHT and TBHT to 40A.  Friday, October 12, 2018, 17:07 TGHT/TBTH was held at 40A reaching max pressure of 1.7e-5 before slowly coming down.  Initiated autoramping.  Thursday, October 18, 2018, 11:10 TGHT reached to 400A/3.98V, pressure is coming down from the upper limit at around 320A which indicated the carbonization is approaching to completion (see attachment#1).  However, two more out-gassing steps are typically observed as TGHT reached around 450 A (see previous UCx conditioning process).  Currently the pressure is at 1.04 e-5 torr.  Auto-ramping TGHT to 450A at 1A/min, continue to observe the vacuum...  Thursday, October 18, 2018, 12:57 TGHT reached to 450A/4.6V. Pressure is coming down from 1.6 e-5 Torr. (see attachment#2).  Will remain at this heating current until pressure reached to mid 10-6 torr.    Friday, October 19, 2018, 10:00 TRIUMF had a total power outage, the TBHT  and TGHT current had been ramped down already.

  Sunday, October 21, 2018, 1:00 pm

the pumps went out, and the communication with the IEVAP was recovered on Sunday, the vacuum was 160 mTorr,

the pumps were turned on again.

Marla Cervantes wrote:

Marla Cervantes wrote: John Wong wrote: Thursday, October 11, 2018, 18:06 Target consists of 284 UCx discs, total packing length of 8.0 cm.  Container was previously coated/sintered with TaC (see elog #417) in Evap#2 with TGHT set to 400A and TBHT 230A, but there was a problem with the readback.  Will ramp up TGHT to 400A to see if the carbonization is complete; if not, additional 50A on TGHT can be applied. One end-cap is inserted on the right, wrt to the ionizer, and left end is open.  Vacuum initial setting: Good Vac = 5.0 e-5 Torr, Bad vac = 8.0 e-5 Torr. pressure level will be monitored accordingly... Auto-ramping setting TGHT: 60 wait time, 0.2A/min, final 400A (or addtional of 50 A if required as mentioned above) TGHT: 60 wait time, 0.2A/min, final 230A.  Chamber is currently being pumped down.  Friday, October 12, 2018, 15:35 Chamber has pumped down to 1.8e-6 Torr.  Stepping up TGHT and TBHT to 40A.  Friday, October 12, 2018, 17:07 TGHT/TBTH was held at 40A reaching max pressure of 1.7e-5 before slowly coming down.  Initiated autoramping.  Thursday, October 18, 2018, 11:10 TGHT reached to 400A/3.98V, pressure is coming down from the upper limit at around 320A which indicated the carbonization is approaching to completion (see attachment#1).  However, two more out-gassing steps are typically observed as TGHT reached around 450 A (see previous UCx conditioning process).  Currently the pressure is at 1.04 e-5 torr.  Auto-ramping TGHT to 450A at 1A/min, continue to observe the vacuum...  Thursday, October 18, 2018, 12:57 TGHT reached to 450A/4.6V. Pressure is coming down from 1.6 e-5 Torr. (see attachment#2).  Will remain at this heating current until pressure reached to mid 10-6 torr.    Friday, October 19, 2018, 10:00 TRIUMF had a total power outage, the TBHT  and TGHT current had been ramped down already.     Sunday, October 21, 2018, 1:00 pm the pumps went out, and the communication with the IEVAP was recovered on Sunday, the vacuum was 160 mTorr, the pumps were turned on again.

 Monday, October 22, 2018, 9:00

The target was transferred to the Ar glove box.

 Tuesday, October 23, 2018, 10:19

Target was inspected:

- Discs were in place

- Orange coating formed on the open end of target container

Spring was removed, two graphite discs were introduced, end cap was placed.

 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.

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.

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.

 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

Wednesday, September 14, 2021, 21:14

Boat is wrapped with 2 layers of Ta-heat shield

The samples consists of 15 discs of UCx of 14mm diameter

The chamber is currently pumping down.

TGHT will be ramped up to 450 A

Wednesday, September 15, 2021, 07:17

IGP1 = 6.75e-6 Torr

Tapped up manually to 40A.

TGHT = 60 A, 2.39 V

Vacuum stable IG1 = 7.25e-6 Torr

Initiating auto-ramp for TGHT at a rate of 0.2A/min to 445 A

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

 Wednesday, September 15, 2021, 11:57

IGP1=2.24e-5 Torr

TGHT= 102.016 A, 1.275 V

Autoramp changed to 1A/min to 450 A

Wednesday, September 15, 2021, 12:53

IGP1 = 3.3e-5 torr

TGHT= 150 A,  V

Autoramp changed to 2A/30s to 450 A

 1e-1 good vac, 5e-1 bad vac

Wednesday, September 15, 2021, 12:59

Friday, September 17, 2021, 07:54

IGP1 = 3.81e-6 Torr

TGHT = 449.6 A, 4.31 V

Autoramp set to -2A/min to 0 A 

Wednesday, April 13, 2022, 10:50

P2NC-220323

Preparing the P2N-UCx for online operation on June 2022

Two cartridges were filled with annular UO2/C foils last week.

48 cartridges total

Today, Darwin and I are placing one of the two cartridges in the EVAP1. The cartridge is P2NC-220323.

Thursday, April 14, 2022, 09:34

Carbothermal reduction heating process started with a ramp rate of 3 A/min

Pressure 1.8E-6T

Thursday, April 14, 2022, 10:31

Paused autoramp because pressure increasing too rapidly. Will continue ramp up once pressure stabilizes.

Thursday, April 14, 2022, 11:20

autoramp restarted @3A/min

IGP1=2.7E-4 Torr

Thursday, April 14, 2022, 13:24

After first major outgass finished and pressure trending down, increased autoramp to 5A/min to 600A

Thursday, April 14, 2022, 13:27

IGP1 = 3.3E-4A

TGHT = 600A, 2.5V

decrease ramp rate to 3A/min to 650A

Thursday, April 14, 2022, 13:45

Set autoramp to 670A

Thursday, April 14, 2022, 13:52

paused autoramp at 668A because pressure increase too steep. 

Changed ramp rate to 0.5A/min and restarted ramp up to 700A

Thursday, April 14, 2022, 15:20

Continued increase in current towards 700A while pressure decrease indicated completeness of reduction.

Started rampdown to 650A.

Pressure was 1.7E-4 Torr on IGP1

Friday, April 15, 2022, 06:28  

The current was reduced to 500A @ 3:50 PM yestesterday.

Currently, TGHT = 500A, 2.0V

started aurtoramp down @ -2A/min

IGP1= 2.4E-6 Torr

Monday, May 02, 2022, 12:32

Cartridge reloaded onto EVAP 1. Will heat back up to check carbothermal reduction. 

Tuesday, May 03, 2022, 08:40

IGP1= 1.32e-6 Torr

Good vacuum 1e-1 Torr

Bad vacuum 5e-1 Torr

Autoramp set to 1A/10s to 500A

Autoramped up to 750A @ 1A/10s.  Only slight pressure increases observed areound 150A and 650A to 700 A.  Parameter curves will be evaluated.

Tuesday, May 03, 2022, 11:11

Started rampdown at -1A/10s. 

IGP1 was 3.0e-5 Torr and trending down when rampdown started