Friday, May 29, 2020, 08:52

Ta tube was coated with TaC and wrapped with Ta heat-shields (3 layers)

Desired temperature= 1900 C (expected TGHT ~430 A), TBHT will be set fixed at 230A (max).

Evap 2 was pumped down

Good vacuum= 3.00 e-5 Torr

Bad vacuum = 5.00 e-5 Torr

Ramped TGHT and TBHT to 40A at 0.5A/min

Initial IGP1 = 3.7e-7 Torr

Friday, May 29, 2020, 10:23

Autoramp deliver 40 A

TGHT = 0.47 V, 40.72 A

TBHT = 0.5 V, 38.78 A

IGP1 = 4.5 e-6 Torr and going down

Autoramp TGHT and TBHT at 1A/min to 400A and 230A respectively.

Friday, May 29, 2020, 11:27

Autoramp was stopped at 70 A, since pressure kept increasing, current was manually decreased to 65 A in both TGHT and TBHT.

The system will remain at current conditions until pressure reduce.

Friday, May 29, 2020, 12:44

 Autoramp TGHT and TBHT at 1A/min to 400A and 230A respectively.

 Tuesday, August 18, 2020, 09:06

A short tantalum tube was coated with TaC and wrapped with 3 layers of Ta,

a Ta foil was attached to the end of the tube to be able to measure the temperature during heating

Desired temperature= 1900 C,

Omega Slope set = 0.990,

IGP1 = 3.75e-7 Torr

Autoramp set to TGHT at 0.2 A/min to reach 52 A

Tuesday, August 18, 2020, 13:47

IGP1=  6.8e-7 Torr

TGHT =0 .511 V, 51.3 A

IGP1 = 6.8e-7 Torr

Autoramp set to TGHT at 0.5 A/min to reach 100 A

IGP1 = 3.3e-7 Torr

Autoramp set to TGHT at 0.5 A/min to reach 430 A 

Wednesday, August 19, 2020, 06:57 

Autoramp stopped at 402 A

IGP1 = 1.12e-6 Torr

TGHT = 5.6 V, 403.65 A

Autoramp set to TGHT at 1 A/min to reach 500 A 

Wednesday, August 19, 2020, 08:59

IGp1 = 1.7e-6 Torr

 TGHT = 7.22 V, 500.34 A

After 30 min at 1900 °C, autoramp set to TGHT at -1 A/min to reach 450 A, the ramp will be stopped when the temperature reads 1850 °C

Autoramp stopped at 1845 °C

IGP1 = 1.17e-6 Torr

TGHT = 6.8 V, 472.95 A 

Thursday, August 19, 2020, 17:28

 A short tantalum tube was coated with TaC and wrapped with 3 layers of Ta,

a Ta foil was attached to the end of the tube to be able to measure the temperature during heating

Desired temperature= 1900 C,

Omega Slope set = 0.990,

Thursday, August 20, 2020, 17:29

IGP1 = 4.25 e-7 Torr

Autoramp set to 0.5A/min to 400 A 

 Thursday, August 20, 2020, 20:36

IGP1 = 6.78e-7 Torr

TGHT = 267.7 A, 3.28 V

Autoramp set to 0.4 A/min to 450 A

Friday, August 21, 2020, 10:28

 IGP1=7.23e-7 torr

TGHT = 6.3 v, 446.3 A

Omega = 1603 °C

Autoramp set to -5 A/min

Thursday, February 07, 2019, 14:12

Tantalum tube coated with TaC and wrapped with 3 layers of Ta heat-shielding.

Desired temperature= 1900 Celsius (expected TGHT ~445A/7.5V)

EVAP2 Currently pumped down, heating will be initiated tomorrow.

Friday, February 08, 2019, 08:46

Current pressure IGP1 = 3.46e-07 Torr

Manual tapping to 50A on TGHT

TGHT 47.43A, 0.26V

Waiting for pressure to stabilize.

Pressure was going down so current was increased manually to 65 A to induce the outgassing.

TGHT 73.9A, 0.67V

MAx pressure IGP1 = 4.41e-6 Torr

After approx 1 hour

TGHT = 0.70 V  74.1 A

IGP1 = 1.63 e-6 Torr

Autoramp was set to 2 A/min for final current of 350 A

 Friday, February 08, 2019, 13:43

Autoramp TGHT reached 350 A /5.47 V, current temperature at 1660 Celsius

IGP1 = 3.0e-06 Torr/coming down

Increase TGHT to 400 A autoramp at 2A/min

 Friday, February 08, 2019, 14:39

TGHT reached 413 A, 6.8 V, pressure at 1.9 e-06 Torr coming down

Continue to tap up TGHT to reach 1900 C

Friday, February 08, 2019, 14:56

TGHT manually increased to 428 A, 7.18V, pressure at 2.0e-06 Torr coming down slowly

Temperature at 1903 C

Will continue to heat at ~1900 C for four hours before cooling down

 Friday, February 08, 2019, 21:00

TGHT 7.21 V, 429.75 A, 1873 C

IGP1 6.77e-7 Torr

The heater ramp is set to -2 A/min to 0 A.

Tuesday, April 30, 2019, 09:33

Container was coated with TaC and wrapped with 2 Ta heat shields.

Desired temp = 1900 C, Omega slope set = 0.990, Auto ramping TGHT at 1A/min to reach 400A, TGHT will be tapped up accordingly to reach desired Temp.

TBHT will be set fixed at 230A (max). TBHT at 1A/min to reach 230A.

Good vac at 3.0e-5 Torr

Bad vac at 5.0e-5 Torr.

Chamber is currently being pumped down (since yesterday evening).

Tuesday, April 30, 2019, 10:25 

Current pressure at IGP1 = 5.17e-7 Torr

Manual tapping to 40A on TBHT and TGHT

TBHT 38.59A, 0.43V

TGHT43.69, 0.23V

waiting for pressure to stabilize.

 Tuesday, April 30, 2019, 15:15

Current pressure IGP1= 5.29e-07 Torr

Auto ramping TGHT at 1A/min to reach 400A, and TBHT at 1A/min to reach 230A.

Wednesday, May 01, 2019, 08:41

Target current of 400A reached around 00:19 am

Will tap up to 444A on TGHT as projected from plot of temperature vs current (attachment 1)

Current IGP1=5.91e-07 Torr

Wednesday, May 01, 2019, 09:54

At 444A 1900C not reached.  Continue tapping to 1900C (attachment 2)

1900 C reached at 459 A on THGT.

will leave at 1900C for 4 hours.

 Wednesday, May 01, 2019, 14:21

IGP1= 6.7e-7 Torr

After 4.5  hours, TGHT was ramped down @ 2A/min and TBHT @1A/min overnight

Thursday, May 02, 2019, 10:46

 Vented Evap 2 and removed the target container.

Friday, September 06, 2019, 11:20

Container was coated with Tac and wrapped with 2 Ta heat shields.

Desired temp=1900 C, Omega slope set =0.990

Chamber pumped down over night and will be initially tapped manually to 40A for both TGHT and TBHT.

Subsequently, current will be automatically ramped up in increments of 1A/min to reach 400A for TGHT and 230A for TBHT.

Then TGHT will be manually tapped to target temperature and allow to stabilize for a minimum of 3 hours.

Good vac at 3.0e-5 Torr

Bad vac at 5.0e-5 Torr

Friday, September 06, 2019, 11:32

IEVAP2:IGP1=9.6e-7 Torr

Tapping to 40A (TGHT and TBHT).

Friday, September 06, 2019, 12:54

Start autoramp

1A/min TGHT and TBHT

IGP1=4.0e-06 Torr

Friday, September 06, 2019, 13:29

TGHT = 70A, TBHT=70A, pressure started to spike rapidly so aborted autoramp and lowered the current to 66A for both TGHT and TBHT.

pressure continued to rise so tapped current to 60A.  A drop observed.  Will allow to stabilize.

Friday, September 06, 2019, 14:06

IGP1=5.3e-06 Torr.  Restart previous ramping. 

At 66A paused ramping.  IPG1= 1.0e-5 Torr

Friday, September 06, 2019, 15:44

IGP1=6.0e-6 Torr

Start modified autoramping: 0.4A/min for TGHT and TBHT.  Will manually tap up in the morning, over ham and eggs. 

Saturday, September 07, 2019, 10:52

 Will tap up to 423 A on TGHT as per attachment #1 regression

IGP1= 1.13e-6 Torr

OMEGA = 1802 C

TGHT= 401.0 A, 6.84V

TBHT=233.6A, 4.1V

Saturday, September 07, 2019, 11:06

Tapped up TGHT to 438A

OMEGA= 1903C

Will monitor and adjust if necessary.

Saturday, September 07, 2019, 15:06

IGP1 =  1.17e-6 Torr

TGHT = 7.46 V, 439.3 A

TBHT = 4.13 V, 233.4 A

Autoramps

TGHT = -2 A/min, TBHT = -1 A/min

Monday, September 09, 2019, 16:34

The EVAP2 was vented and the target container was removed. 

Thursday, October 03, 2019, 08:58

Ta tube was coated with TaC and wrapped with Ta heat-shields (3 layers)

Initial weight including heat-shields = 427 g

Desired temperature = 1900 C (expected TGHT ~430 A), TBHT will be set fixed at 230A (max).

Evap 2 was pumped down previous night.

IGP1= 7.81e-07 Torr

Manually tapping up to ~40A on both TGHT and TBHT at ~1A/min

Good vacuum = 3.00 e-5 Torr

Bad vacuum = 5.00 e-5 Torr

Thursday, October 03, 2019, 09:21

Manually tapped to 50A on TGHT and TBHT

Will allow pressure to stabilize and begin autoramp TGHT and TBHT at 1A/min to 400A and 230A respectively.

autoramp increments might be increased to 2A/min depending on stability of system.

Thursday, October 03, 2019, 10:00

TGHT = 51.6A, 0.36V

TBHT = 49.5A, 0.62V

IGP1=9.6e-7 Torr

Starting autoramp at 1A/min to a max of 400A for TGHT and 230A for TBHT.  Will monitor and increase ramp increments to 2A/min if stable.

Thursday, October 03, 2019, 11:09

TGHT = 103A, TBHT=97A

IGP1=9.1e-06 Torr and dropping

Will increase autoramp increments to 2A/min

Thursday, October 03, 2019, 11:41

With TGHT = 148A, 1.9V and TBHT = 141A, 2.3V

IGP1= 7.9e-6 Torr

Autoramp was increased to 3A/min

Thursday, October 03, 2019, 13:45

TGHT=401A, 6.9V

TBHT=233A, 4.2V

IGP1= 1.14e-05Torr

OMEGA = 1874

begin manual ramp to 1900C

(Temperature dropping as pressure drops)

 Thursday, October 03, 2019, 14:11

 TGHT= 416A, 7.1V

TBHT=233A, 4.2V

OMEGA = 1900 C

IGP1= 6.9e-06 Torr and trending down

Thursday, October 03, 2019, 15:24

TGHT manually bumped to 421A,  7.2 V because temperature dropped slightly.

Thursday, October 03, 2019, 19:00

TGHT manually increased to 425A, 7.3V

Thursday, October 03, 2019, 19:12

TGHT = 424.9A, 7.3V

TBHT=233.2A, 4.1V

OMEGA= 1897 C

IGPA=1.45e-06 Torr

Starting ramp-down at -1A/min on TGHT and 0.5A/min on TBHT

Friday, October 04, 2019, 11:34

Container taken out.

Thursday, October 17, 2019, 12:00

Ta tube was coated with TaC and wrapped with Ta heat-shields (3 layers)

Desired temperature= 1900 C (expected TGHT ~430 A), TBHT will be set fixed at 230A (max).

Evap 2 was pumped down on the previous night.

Good vacuum= 3.00 e-5 Torr

Bad vacuum = 5.00 e-5 Torr

Ramped TGHT and TBHT to 40A at 0.5A/min

Initial IGP1= 7.0 e-07 Torr

Thursday, October 17, 2019, 13:53

After pressure stabilization at 40A:

 Autoramp TGHT and TBHT at 1A/min to 400A and 230A respectively.

 Friday, October 18, 2019, 6:20

TGHT = 400A, 6.52V, TBHT= 233A, 4.1V

OMEGA = 1733C

Start autoramp to 430A on TGHT at 1A/min

Friday, October 18, 2019, 7:05

TGHT= 431A, 7.1V

TBHT= 233A, 4.1V

IGP1= 1.13e-06 Torr

OMEGA = 1828 C

Set autoramp to 465 at 1A/min

Friday, October 18, 2019, 11:13

TGHT = 465A, 7.8V, TBHT = 233A, 4.1V

OMEGA = 1865C

(Something is different with the heat dissipation on this target.  Will leave at this current and start cooling at 1200 noon to avoid container strain)

 Friday, October 18, 2019, 12:00

TGHT = 462.7A, 7.8V

TBHT= 233.4A, 4.1V

OMEGA = 1863C

IPG1= 1.02e-06 Torr

Commence cooling at -2A/min for TGHT and -1A/min for TBHT

 Monday, October 21, 2019, 09:11

Pump down and dismount.

 Friday, November 22, 2019, 18:18:

Friday, November 22, 2019, 18:18: Roughing

Friday, November 22, 2019, 18:23: Turbo on .

Friday, November 22, 2019, 18:32: Turbo at speed 

12.3

Saturday, November 23, 2019, 14:00

Container coated with TaC and wrapped with 3 Ta heat shields.

Desired temperature= 1900 C, Omega Slope set = 0.990, Auto TGHT at 0.2A/min to reach 400A, TGHT will be tapped up accordingly to reach desired Temp.

TBHT will be set fixed at 230 A (max). 

Good vac at 3.00e -5 Torr

Bad vac at 5.00e-5 Torr

Chamber pump down was started on Friday November 22; however.

No leaks were observed when turning water lines on.

IGP1= 4.6e-07 Torr

 Saturday, November 23, 2019, 15:30

autoramp at 0.5A /min up to 50A for both TGHT and TBHT and maintained for 1 hour.

Saturday, November 23, 2019, 16:15

IGP1= 1.1e-06 Torr

Auto Ramp to 450 A on THGT and 230A on TBHT at 0.5A/min

Saturday, November 23, 2019, 23:44

IGP1= 5.2e-06 Torr

TGHT = 248A, 2.9V  TBHT= 233A 2.9V

Increased ramp step to 1A/min to 620 A

Sunday, November 24, 2019, 00:14

IGP1=1.9e-06 Torr

TGHT = 274.3, 3.3V   TBHT= 233A, 2.9V

Sunday, November 24, 2019, 07:33

IGP1=3.2e-06 Torr

OMEGA= 1490C

TGHT = 619 A, 9.1V   TBHT=233A, 2.9V

Continue ramping THGT at 1A/min to 700 A

Sunday, November 24, 2019, 10:05

IGP1= 2.1 e-05 Torr

OMEGA= 1676 C

TGHT= 700A, 10.6V   TBHT= 233A, 2.0V

Start autoramp to 780A as per regression in attachment

Sunday, November 24, 2019, 13:22

Autoramp to 795A  for TGHT

Sunday, November 24, 2019, 21:16

OMEGA= 1854 C

TGHT= 789.6A, 12.27V  TBHT= 233.A, 2.9V

IGP1= 2.0e-05

Will allow pressure to stabilize lower.

Sunday, November 24, 2019, 22:16

TGHTT= 789.6A, 12.3V TBHT=233.3A, 2.9V

OMEGA=1855C

IGP1 = 6.9e-06Torr

Start cooling TGHT at 2A/min and TBHT at 1A/min

Monday, March 9, 2020, 03:15

Container coated with TaC and wrapped with 3 Ta heat shields.

Desired temperature= 1900 C, Omega Slope set = 0.990, Auto TGHT at 0.2A/min to reach 400A, TGHT will be tapped up accordingly to reach desired Temp.

TBHT will be set fixed at 230 A (max).

Good vac at 3.00e -5 Torr

Bad vac at 5.00e-5 Torr

Chamber pump down

Tuesday, March 10, 2020, 09:17

Starting manual ramp to 50 A @ approximately 2A/min

IGP1 = 3.73e-7 Torr after opening water line pressure slowly incresed to 4.4e-7 Torr

TBHT also has Chiller interlock reached out to controls for removal.

Tuesday, March 10, 2020, 10:47

Chiller Interlock removed for TBHT.   Started manual ramp to 50A @ approximately 2A/min

Tuesday, March 10, 2020, 11:15

allowing to stabilize at 50A on TGHT and TBHT

IGP1= 7.9 e=7 Torr and trending up

Tuesday, March 10, 2020, 12:09

Pressure on IGP1 spiked.  Allowing to stabilize.

Tuesday, March 10, 2020, 14:36: Stopped By to check. Vacuum @ 3.02e-03T. Turbo pump appears to have tripped. Shut off Both PS. Prepare to vent. - Aaron S.

Tuesday, March 10, 2020, 14:48: Tightened all fittings (Just in case). HS side & HS waterline at the feed through. Roughing. 

Tuesday, March 10, 2020, 15:06: TP1 @ 38KRPM 1.34e-04T & dropping.  TGHT & TBHT PS on. Monitor before heating. -AS

Wednesday, March 11, 2020, 06:25: Vacuum @ 3.39e-07T. TGHT / TBHT PS on. - AS

Wednesday, March 11, 2020, 06:26: Manually tapped up TGHT / TBHT to 10 / 10 A. Ok.

Wednesday, March 11, 2020, 06:28: Auto-ramping TGHT / TBHT @ 4 A per min to 50 / 50 A.

Wednesday, March 11, 2020, 07:07: Vacuum @ 3.64e-07T. TGHT / TBHT @ 50 A. All appears stable. - AS

Wednesday, March 11, 2020, 07:036

Started autoramp  at 2 A/min

IGP1= 3.6e-7 Torr

Wednesday, March 11, 2020, 08:06

TGHT=10 5A, 1.3 V       TBHT = 105 A, 1.2 V

pressure rising fast; manual ramp down to 95A on both TGHT and TBHT

 Wednesday, March 11, 2020, 09:54

 IGP1= 4.7e-6 Torr; TGHT = 93.1 A, 1.2 V; TBHT = 95.1 A, 1.1 V

start autoramp at 1A/min (0.5 A/30s)

IGP1= 1.28e-5 Torr

TGHT = 108.3 A, 1.44 V

TBHT = 110 A, 1.29 V

Stop autoramp

Wednesday, March 11, 2020, 10:25

IGP1= 5.9e-5 Torr

manually tapped TGHT and TBHT set-current to  105 A respectively. 

pressure dropping.

Wednesday, March 11, 2020, 11:18

IGP1=8.0e-06 Torr

manually ramp to set-current 115 A for both TGHT and TBHT at approximately 2A/ min

allow to stabilize before proceeding

Wednesday, March 11, 2020, 12:12

IGP1=7.02e-6 Torr

TGHT = 112.7 A, 1.5 V

TBHT = 114.6 A, 1.4 V

Auto-ramping at 1A/min TGHT to 430 A and TBHT top 230A

 Wednesday, March 11, 2020, 18:45

IGP1= 1.2 e-06 Torr

TGHT=421.8 A, 6.2 V

TBHT = 231.9 A, 3.1 V

auto-ramp TGHT at 1A/min to set-current 530A

Wednesday, March 11, 2020, 23:08

IGP1= 1.3e-6 Torr

TGHT= 519.9 A, 7.87V

TBHT = 232.0 A, 3.1 V

start autoramp TGHT to 600A at  1A/min

Wednesday, March 11, 2020, 23:36

IGP1= 1.6e-6 Torr

TGHT = 542.9 A, 8.2V

TBHT = 232.9 A, 3.1V

Set autoramp to 750A on TGHT at 0.5 A/min

Thursday, March 12, 2020, 06:55

The Voltage set on TGHT was too low so current had not increased

IGP1= 1.5e-6 Torr

TGHT = 640 A, 10V

TBHT 232/9A, 3.1V

Oncrease TGHT voltage set to 14.5 and start autoramp at 3A/min to 750 A

Thursday, March 12, 2020, 7:43

TGHT = 735.7 A, 11.8V

OMEGA = 1595C

Auto -ramp set to 780 A for TGHT

Thursday, March 12, 2020, 7:58

OMEGA = 1655 C

TGHT set to 800 A at 3A/min

Thursday, March 12, 2020, 9:42

OMEGA =  1704 C

TGHT = 789.5 A, 13.0 V

Manual tap up to 837 A set on TGHT and 821 A readback

Thursday, March 12, 2020, 10:00

TGHT readback = 821.0 A, 13.7 V

OMEGA = 1744 C

TBHT same as previous entry.

 Thursday, March 12, 2020, 10:35

 Tapped up TGHT to 832.6 A, 13.8 V

OMEGA = 1759 C

TBHT = 232.9 A, 3.6 V

Will not tap further. 

Thursday, March 12, 2020, 13:22

IGP1 = 5.0 e-06 Torr (stable)

TGHT = 832.7 A readback (849 A set), 13.7V

TBHT = 232.9 A, 3.6 V

OMEGA = 1758 C

Start cooling at TGHT 3A/min

 Thursday, March 12, 2020, 14:08

IGP1= 1.32e-06 Torr

TGHT = 706 A, 11.0 V

TBHT = same as previous

OMEGA = 1583C

Start cooling TBHT at 1A/min continue cooling TGHT at 3A/min

Friday, March 13, 2020, 08:18

IGP1= 3.9e-8 Torr

Will unload sintered container

 Wednesday, March 18, 2020, 07:10

Ta tube was coated with TaC and wrapped with Ta heat-shields (3 layers)

Desired temperature= 1900 C (expected TGHT ~430 A), TBHT will be set fixed at 230A (max).

Evap 2 was pumped down on the previous night.

Good vacuum= 3.00 e-5 Torr

Bad vacuum = 5.00 e-5 Torr

Ramped TGHT and TBHT to 40A at 0.5A/min

Initial pressure IGP1 = 4.8e-7Torr

 Wednesday, March 18, 2020, 09:29

After an hour pressure reduced to 5.45e-6 Torr

TGHT; 0.518 V, 40.5 A

TBHT: 0.41 V, 38.6 A

Autoramp TGHT and TBHT at 1A/min to 400A and 230A respectively.

 Wednesday, March 18, 2020, 18:29

TGHT = 400A, 6.6V, TBHT= 232.9, 3.9V

OMEGA = 1240 C, this is 500 degC lower than previous LP-SIS at same conditions

https://elog.triumf.ca/TIS/Evaporator_2/464

Start autoramp to 460A on TGHT at 1A/min

Wednesday, March 18, 2020, 20:51

TGHT: 464 A, 7.75 V

Temperature 1328, I won't increase the temperature because there is a chance that the reading is 500 degC off and the target is sitting at 1828 degC instead of 1328 degC 

Wednesday, March 18, 2020, 23:17

After ~4 hours at 1317 degC according to the pyrometer:

TGHT = 7.7 V, 457.8 A,

TBHT = 3.9 V, 232.9 A,

IGP1 = 1.16e-6

Commence cooling at -2A/min for TGHT and -1A/min for TBHT

Thursday, March 19, 2020, 15:53

Venting and dismounting.

The coating does not have the quality to be used online, another LP-SIS will be coated and sinter

 Monday, June 15, 2020, 13:30

Container coated with TaC and wrapped with 3 Ta heat shields.

Desired temperature= 1900 C, Omega Slope set = 0.990, Auto TGHT at 0.2A/min to reach 400A, TGHT will be tapped up accordingly to reach desired Temp.

TBHT will be set fixed at 230 A max).

Good vac at 3.00e -5 Torr

Bad vac at 5.00e-5 Torr

Chamber pump down

 Sunday, August 30, 2020, 06:47

A short tantalum tube was coated with TaC and wrapped with 3 layers of Ta,

a Ta cap was inserted to the end of the tube to be able to measure the temperature during heating

Desired temperature= 1900 C,

Omega Slope set = 0.990

Sunday, August 30, 2020, 06:48

IGP1 = 3.9e-7 Torr

Autoramp set to 0.5A/min to 400 A 

Sunday, August 30, 2020, 18:27

IGP1 8.41e-7 Torr

TGHT = 4.2 V, 327.15 A

Omega  = 1367 °C 

Sunday, August 30, 2020, 18:49

IGP1 = 9.6e-7 Torr

TGHT = 4.4 V, 337.1 a

Omega = 1402 °C 

Sunday, August 30, 2020, 19:25

IGP1 = 9.5e-7 Torr

TGHT = 4.6 A, 347.5 A

Omega = 1472 °C 

Autoramp set to 450 A at 0.1A/30s

Sunday, August 30, 2020, 19:59

IGP1 = 8.5e-7 Torr

TGHT = 4.8 V, 360.5 A

Omega = 1510 °C

 Sunday, August 30, 2020, 22:07

IGP1 = 7.2e-7 Torr

TGHT = 5.3 V, 392.6 A

Omega = 1675 °C 

 Sunday, August 30, 2020, 22:16

IGP1 = 7.1e-7 Torr

TGHT = 5.5 V, 403.2 A

Omega = 1678 °C

Autoramp set to 450 at 0.1A/min

 Sunday, August 30, 2020, 22:26

IGP1 = 6.9e-7 Torr

TGHT = 5.5 V, 399.15 A

Omega = 1689 °C

Monday, August 31, 2020, 08:08

IGP1 = 4.4e-7 Torr

TGHT = 6.4 V, 453.4

Omega =  1852 °C

Monday, August 31, 2020, 08:12 

Autorap set to 0 A at -5 A/min

 Thursday, September 17, 2020, 16:10

An LP-SIS was wrapped with 3 Ta layers, and installed in the EVAP2

Desired temperature= 1900 C, Omega Slope = 0.990

Friday, September 18, 2020, 10:56

IGP1 = 4.4e-7 Torr 

Leak check performed, no leak observed

Friday, September 18, 2020, 11:16

Power supplies on.

Good vac at 3.00e -5 Torr

Bad vac at 5.00e-5 Torr

Autoramp at 0.5A/min to 400A on TGHT and 230A on TBHT

 Friday, September 18, 2020, 11:21

Autoramp paused because, TBHT is not ramping

Ramping manually current to 10 A in 0.5 A steps

Friday, September 18, 2020, 11:38

Restarted autoramp  (Autoramp at 0.5A/min to 400A on TGHT and 230A on TBHT)

Friday, September 18, 2020, 22:50

IGP1 = 2.04e-6 Torr 

TGHT = 5 V, 322.8 A

TBHT = 4 V, 233.1 A

Omega = 1459 °C

Autoramp changed to 0.2 A/min to 450 A

Saturday, September 19, 2020, 10:49

IGP1 = 8e-7 Torr

TGHT = 7.3 V, 449.1 A

TBHT = 4 V, 233.1 A

Omega = 1789 degC

 Saturday, September 19, 2020, 13:25

IGP1 = 6.5 e-7 Torr

TGHT  7.2 V, 447.975 A

TBHT = 4.08 V, 233.09 A

Omega = 1785 °C

Saturday, September 19, 2020, 13:26

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

Monday, September 21, 2020, 09:16

Turning off pumps 

Monday, September 21, 2020, 16:47

EVAP2 was vented with air and the tantalum oven was removed, the coating seems sintered. 

Tuesday, March 02, 2021, 11:26 

Ta tube was coated with TaC and wrapped with Ta heat-shields (3 layers)

Initial weight including heat-shields = 433.8 g

Desired temperature = 1900 C (expected TGHT ~430 A), TBHT will be set fixed at 230A (max).

Evap 2 will be pumped down over night.

Good vacuum = 3.00 e-5 Torr

Bad vacuum = 5.00 e-5 Torr

Wednesday, March 03, 2021, 13:28

IGP1 = 4.0 e-7 Torr

Start ramping @ 1A/min to 20A on both TGHT and TBHT

Wednesday, March 03, 2021, 15:03

Start ramping @1/min to 60A on Both TGHT and TBHT

Wednesday, March 03, 2021, 22:42

TGHT = 60A, TBHT = 60A

IGP1= 4.2 e-7 stable

Start ramping to 400A @ .5A/min for TGHT and @0.5A/min for TBHT to 230A

Thursday, March 04, 2021, 11:56

TGHT = 400 A, TBHT =230A

IGP1= 1.9e-6 Torr

OMEGA = 1695 C

Continue ramp up @0.5A/min to 430A on TGHT

Thursday, March 04, 2021, 14:02

IGP1 = 1.87e-6 Torr

TGHT = 434 A , 7.2 V

OMEGA = 1787 C

Will tap up manually 450A @ on TGHT and leave at that current for ~4 hours

Thursday, March 04, 2021, 19:35

After ~ 5 hours at 1829 C max OMEGA reading

OMEGA = 815 C 

Start ramp down at 1A/min on TGHT and 0.8A/min for TBHT

IGP1= 1.2e-6 Torr

 Friday, March 05, 2021, 10:47

Ta tube was coated with TaC and wrapped with Ta heat-shields (3 layers)

Initial weight including heat-shields = 431.0 g

Desired temperature = 1900 C (expected TGHT ~430 A), TBHT will be set fixed at 230A (max).

Evap 2 will be pumped down over night.

Good vacuum = 3.00 e-5 Torr

Bad vacuum = 5.00 e-5 Torr

 Saturday, March 06, 2021, 10:29

IGP1= 2.7 e-07 Torr and stable

AutoRamp at 1A/min to 40 A on TGHT and TBHT

Saturday, March 06, 2021, 22:36

IGP1= 2.2e-07 Torr

TGHT = 40.3 A, .46V

TBHT = 38.48 A, .48 V  (set to 40 A)

Start Autoramp at 0.5A/min to 400 A on TGHT and 230A on TBHT

Sunday, March 07, 2021, 07:48

IGP1=8.5e-7 Torr

TGHT = 287 A, 4.6V

TBHT = 232 A, 4.0 V

OMEGA = 1493C

 Increase ramp speed on TGHT to 2A/min to 400A

Sunday, March 07, 2021, 08:36 

 IGP1=1.7 e-06 Torr

TGHT = 373.7 A, 6.3V

TBHT = 232.9 A, 4.1 V

OMEGA = 1752 C

Sunday, March 07, 2021, 08:53

 IGP1= 1.7e-06 Torr

TGHT = 400 A, 6.8 V

TBHT = 232.8 A, 4.1 V

OMEGA= 1842

Ramp TGHT @ 2A/min to 420 A as per attached current approximation

Sunday, March 07, 2021, 09:25

OMEGA=1915 C

TGHT = 420A, 7.2V

TBHT= 232.8 A, 4.1V

IGP1= 1.6 e-06 Torr

Tap down manually to approx 1900 C

TGHT = 412.9 A, 7.0 V and OMEGA=1900 C

Will leave for about 4 hours at this temperature

Sunday, March 07, 2021, 13:05

IGP1= 1.1 e-06 Torr

TGHT = 415 A, 7.2 V

TBHT = 232.8 A, 4.1 V

OMEGA = 1880C

Start cool down at -2A/min on TGHT and -1A/min TBHT

Tuesday, March 09, 2021, 11:54 

 Container coated with TaC and wrapped with 3 Ta heat shields.

Desired temperature= 1900 C, Omega Slope set = 0.990, Auto TGHT at 0.2A/min to reach 400A, TGHT will be increased  accordingly to reach desired Temp.

TBHT will be set fixed at 230 A max).

Good vac at 3.00e -5 Torr

Bad vac at 5.00e-5 Torr

Chamber pump down

Wednesday, March 10, 2021, 08:32

IGP1 = 2.6 e -07 Torr

Start autoramp @ 1A/min to 40 A on both TGHT and TBHT

***Autoramp aborted due to work on EF12 affecting EVAP2***

Will have to resume Thursday or Friday

Saturday, March 13, 2021, 7:54

  IGP1= 3.8e-07 Torr

Initiate heating @ 0.5A/min TBHT and TGHT to 60 A

Saturday, March 13, 2021, 23:01

IGP1 = 2.7e-07Torr

TGHT = 60.5A, 0.7V

TBHT= 60.0A, 0.7V

Initiate ramp @ 1 a/min to 400 A on TGHT and 230A on TBHT

Sunday, March 14, 2021, 08:45

IGP1= 8.2e-07 Torr

TGHT = 400A, 5.6V

TBHT = 232.9A, 3.0V 

OMEGA = 1142 C

Continue ramping to 460 A on TGHT at 1a/min

 Sunday, March 14, 2021, 10:11

IGP1 = 1.0 e-06 Torr

TGHT= 460.4 A, 6.5 V

TBHT = 232.9 A, 3.0 V

OMEGA = 1239 C

Will ramp up to 500 A at 1a/min on TGHT

Sunday, March 14, 2021, 10:53

 IGP1 = 1.3 e-06 Torr

TGHT= 495 A, 7.2 V

TBHT = 232.9 A, 3.0 V

OMEGA = 1316 C

Will ramp up to 600 A at 1a/min on TGHT

Sunday, March 14, 2021, 12:45

IGP1 = 3.0 e-06 Torr

TGHT= 604 A, 9.1 V

TBHT = 232.9 A, 3.1 V

OMEGA = 1610 C

Will ramp up to 660 A at 1a/min on TGHT 

Sunday, March 14, 2021, 17:01

IGP1= 2.4e-06 Torr

TGHT =  664 A, 10V

TBHT = 232.9 A, 3.1V

OMEGA = 1733 C

tapping TGHT to 740 A

OMEGA = 1883 C

 Sunday, March 14, 2021, 21:45

IGP1= 3.1e-06 Torr

TGHT =  744A, 11.5V

TBHT = 232.9 A, 3.2V

OMEGA = 1875 C

Start cooling TGHT @-3A/min and TBHT @-1A/min

 Thursday, September 02, 2021, 06:36

Ta tube was coated with TaC and wrapped with Ta heat-shields (3 layers)

Desired temperature = 1900 C (expected TGHT ~430 A), TBHT will be set fixed at 230A (max).

Evap 2 was pumped down over previous night

Good vacuum = 3.00 e-5 Torr

Bad vacuum = 5.00 e-4 Torr

IGP1=7.7e-07 Torr

Initiate autoramp to 50 A @ 1A/min

Thursday, September 02, 2021, 06:54 

Stopped autoramp after reading email about EF-12 trip and compressed air issue.  Reset to 0 A both TGHT and TBHT

Thursday, September 02, 2021, 12:01

Ispite of site compressed air issues, EVAP 2 has not tripped.  Will manually increase current to40A for both TGHT and TBHT.

IGP1= 1.06 E-06 Torr. 

Friday, September 03, 2021, 08:06

 IGP1= 7.2e-07 Torr

TGHT= 43A, 0.5 V

TBHT= 41A, 0.48 V

Start autoramp at 1A/min to 90A on both TGHT and TBHT

Friday, September 03, 2021, 10:22

IGP1= 1.55 e-06 Torr

TGHT = 90.1 A, 1.1 V

TBHT= 90.0 A, 1.2 V

Continue ramp up at 1A/min to 400 A for TGHT and 230A for TBHT 

Friday, September 03, 2021, 16:05

430A on TGHT will keep for four hours.  OMEGA = 1856 C but according to regression should be 1900.  will keep at this temp. 

Friday, September 03, 2021, 21:11

OMEGA has been at 1875C for 4 hours.  Will start ramp down @ -2A per minute for TGHT and -1A min for TBHT

TGHT = 430 A, 7.3 V   (current actually fluctuates between 428 and 433 A since new power supply

TBHT = 233A, 4.0V  (set to 230 but displays 233) 

Tuesday, September 14, 2021, 09:32

Ta IGLIS tube was coated with TaC and wrapped with Ta heat-shields (3 layers)

Desired temperature = 1900 C (expected TGHT ~430 A), TBHT will be set fixed at 230A (max).

Evap 2 was pumped down over previous night

Good vacuum = 3.00 e-5 Torr

Bad vacuum = 5.00 e-4 Torr

IGP1= 1.12 e-06 Torr

Initiate manual ramp to 50 A @ 1A/min

Tuesday, September 14, 2021, 14:44

 IGP1= 1.25e-06 Torr

TGHT = 50A, 0.58V  TBHT = 49A, 0.56V

Start autoramp to 400 A TGHT and 230A TBHT @ 1A/min

Heated to 1880 C and held for 4 hours.  Log info written down but could not be found in system later.

Coating proceeded without issues.