Thursday, June 09, 2022, 11:25

Total number of foils: 14 electrospun fiber pellets 

Total weight = 208.3 g

container has 3 Ta heat shields.

Desired temperature at 1800 C

Omega slope set at 0.990 

Good vac = 3.0e-5 Torr,

Bad vac = 5.0e-5 Torr.

Pumping down in progress

 Thursday, June 09, 2022, 11:25

chamber pumped down below 5e-5

initiate auto ramping, 1A/min ----> 100 A

 (see eLog 581)

Tuesday, June 07, 2022, 07:19

Total number of foils: 403 ( including 5 analysis discs on the right side of the container)

Total weight = 1535.3 g (includes heatshields, spring and T bar)

Total length packed 16.4 cm (excluding 5 analysis discs that will be removed)

container has 3 Ta heat shields.

No endcaps inserted to facilitate out-gassing

Ta coated spring at  front (right) side

Initially to ramp TGHT and TBHT to 50A at 3 A/min

then continue to 80A and slow down ramp when pressure begins to increase

max approx 700A on TGHT and 230A on TBHT (Omega slope set = 0.990)

Then temperature = 1800C

TBHT will be set fixed at 230 A (max).  TBHT heated manually and automatically to max.

Good vac at 3.00 e -4 Torr

Bad vac at 5.00 e-2 Torr

 IGP1= 7.6 e-07 Torr at start of initial ramp.

 Tuesday, June 07, 2022, 11:14

Ramping to 150A on TGHT and TBHT at 1A/min

Ramped TGHT and TBHT to 230A at 2A/min

Tuesday, June 07, 2022, 13:12

Ramping TGHT to 600A at 4A/min

TBHT at 230A, 3.0V

Tuesday, June 07, 2022, 16:41

TGHT= 740 A, 12.1V

TBHT= 232A, 3.0 V

OMEGA reading 1616C but questionable.  Will leave for 4 hours at 740A top TGHT.

Wednesday, June 08, 2022, 22:15

Early Wednesday morning the left TGHT bolt was found damaged.  The target leg was coated with bolt material rendering the Target inoperable.   

The Heatshield assembly was swapped and surfaces cleaned.  A "dummy" FEBIAD was installed to test if the system can withstand high current. 

The system was pumped down and ramped to 740A on TGHT at 4A/min.  It was then left at that current for 4 to 5 hours.

Currently starting rampdown at -2A/min to 0A. 

Photos of the incident attached in *eLog 580*.  IGP1= 5.7e-06 Torr

TGHT= 742A, 11.4V

 Ta#64 LP-SIS target description: 

Total Ta foils = 470 [6x20 packs + 350 single discs]

Foil Thickness = 0.0254mm (0.0010") Measured.

Target density = 12.005 g/cm3

Target length = 3.35 cm

Total Mass = 40.2166 g [Incl foils + Ta wire on 6 packs]

Total mass w/ Target oven= 446 g (w/ end caps)

Discs in target are arranged as follows: 1pack / 75 singles / 1pack / 100 singles / 2packs / 100 singles / 1pack / 75 singles / 1pack

End caps installed (Not expanded). No Ta foil heat shield added

Final desired temperature = 1900C.

Thursday, June 02, 2022, 16:49: Roughing 

Thursday, June 02, 2022, 17:02: OMEGA slope = 0.98. 

Thursday, June 02, 2022, 17:10: TP1 on.

Thursday, June 02, 2022, 17:21: TP1 is up to speed. PS on. 

Friday, June 03, 2022, 05:22: Auto-ramping TGHT / TBHT to 500 / 200 A @ 2 A per min. Vacuum @ 1.78e-06T.

Friday, June 03, 2022, 08:59: TGHT / TBHT @ 424 / 200 A. Vacuum @ 3.42e-06T. Temperature @ 1318 C. Auto ramp ongoing.

Friday, June 03, 2022, 09:40: TGHT / TBHT @ 500 / 200 A. Vacuum @ 4.47e-06T. Temperature @ 1469 C. Auto-ramping TGHT / TBHT to 580 / 230 A @ 2 A per min

Friday, June 03, 2022, 10:47: TGHT / TBHT @ 580 / 230 A. Vacuum @ 6.26e-06T. Temperature @ 1620 C. Auto-ramping TGHT to 600 @ 2 A per min 

Friday, June 03, 2022, 11:08: TGHT / TBHT @ 600 / 230 A. Vacuum @ 6.54e-06T. Temperature @ 1655 C. Auto-ramping TGHT to 630 @ 2 A per min  

Friday, June 03, 2022, 11:30: TGHT / TBHT @ 630 / 230 A. Vacuum @ 7.73e-06T. Temperature @ 1708 C. Auto-ramping TGHT to 650 @ 2 A per min

Friday, June 03, 2022, 11:45: TGHT / TBHT @ 650 / 230 A. Vacuum @ 8.32e-06T. Temperature @ 1748 C. Auto-ramping TGHT to 660 @ 2 A per min

Friday, June 03, 2022, 11:53: TGHT / TBHT @ 660 / 230 A. Vacuum @ 8.83e-06T. Temperature @ 1755 C. Auto-ramping TGHT to 670 @ 2 A per min

Friday, June 03, 2022, 12:05: TGHT / TBHT @ 670 / 230 A. Vacuum @ 9.03e-06T. Temperature @ 1780 C. Auto-ramping TGHT to 680 @ 2 A per min

Friday, June 03, 2022, 12:11: TGHT / TBHT @ 680 / 230 A. Vacuum @ 9.14e-06T. Temperature @ 1795 C. Auto-ramping TGHT to 700 @ 2 A per min 

Friday, June 03, 2022, 12:23: TGHT / TBHT @ 700 / 230 A. Vacuum @ 9.50e-06T. Temperature @ 1822 C. Auto-ramping TGHT to 720 @ 2 A per min

Friday, June 03, 2022, 12:29: TGHT / TBHT @ 720 / 230 A. Vacuum @ 1.00e-05T. Temperature @ 1853 C. Auto-ramping TGHT to 730 @ 2 A per min

Friday, June 03, 2022, 12:36: TGHT / TBHT @ 725 / 230 A. Vacuum @ 1.04e-05T. Temperature @ 1860 C. Manually tap up TGHT to reach desired temperature

Friday, June 03, 2022, 13:04: TGHT / TBHT @ 760 / 230 A. Vacuum @ 1.07e-05T. Temperature @ 1901 C. Desired temperature reached

Friday, June 03, 2022, 13:13: Auto-cooling at 2 A per min. 

Monday, June 06, 2022, 07:07: PS off. BV1 closed & TP1 off.

Monday, June 06, 2022, 08:47: Venting. 

 Wednesday, May 18, 2022, 09:46

Total number of foils: 415 ( including 10 analysis discs on the right side of the container)

Total weight = 1580 g (includes heatshields and T bar)

Total length packed 17 cm (including 10 analysis discs that will be removed)

container has 3 Ta heat shields.

No endcaps inserted to facilitate out-gassing

Ta coated spring at  front (right) side

Initially to ramp TGHT and TBHT to 30A at 3 A/min

then continue to and slow down ramp when pressure begins to increase

max approx 700A on TGHT and 230A on TBHT (Omega slope set = 0.990)

Then temperature = 1800C

TBHT will be set fixed at 230 A (max).  TBHT heated manually and automatically to max.

Good vac at 3.00 e -4 Torr

Bad vac at 5.00 e-2 Torr

 IGP1= 7.1 e-07 Torr at start of initial ramp.  Note, first real operation with new noisy Turbo Pump.

Wednesday, May 18, 2022, 10:18

Pressure increase observed starting around 60A.  Ramped to 70 A and will leave until pressure stabilizes

After about 30 minutes pressure dropped so ramped up to 90 A @1A/min on both TGHT and TBHT

Wednesday, May 18, 2022, 11:37

pressure spike around 90A.  will leave until pressure stabilizes 

Wednesday, May 18, 2022, 12:54  

start autoramp to 100A at 1A/min.  IGP1= 1.4e-4 Torr

Wednesday, May 18, 2022, 13:15

autoramp to 150A @1A/min 

Wednesday, May 18, 2022, 13:41

 At 110A another spike in pressure.  System waiting for good vacuum

Wednesday, May 18, 2022, 15:24

ramped to 150A on both TGHT and TBHT.  Ramping to 200 A at @A/min for both TGHT and TBHT

currently IGP1=  2.0e-4 Torr

Wednesday, May 18, 2022, 15:33  

Pressure still trending down; therefore will start ramp at 4A/min to 400 amp on TGHT and 230A to TBHT

Wednesday, May 18, 2022, 16:22 

Increasing ramp to 4A/min on TGHT

Wednesday, May 18, 2022, 17:26 

switched to 6A/min in 1A/10s increments on TGHT

Wednesday, May 18, 2022, 17:43 

Set final current to 730 A as per regression attached.

Wednesday, May 18, 2022, 17:54

Final current on TGHT = 740A, 11.9 V

OMEGA = 1775 C

TBHT = 230A, 

Will leave for 4 hours

Wednesday, May 18, 2022, 19:56

Temperature dropped so increased current to 755A for the remaining of the time.

Friday, May 20, 2022, 08:58

Final notes:  The difference between initial and final mass was 6 g as expected.  Slight coating on window of evaporator may explain apparent temperature drop.  Next time will keep current at projected setting.  The material looks good with slight overheating on the outer discs of left side.

 Tuesday, May 10, 2022, 14:42: TV551 Varian. SN: 202311 (Slightly active from BL1A - will not cross contaminate. Field only - Tagged) was removed as it was meant to be a temporary fix. Replacement (Refurbished) pump is to be installed. (Tomorrow - Use slow start function as per vacuum group) 

Thursday, May 12, 2022, 13:30: Agilent TP & hardware installed.

SN: IT21381010 

Thursday, May 12, 2022, 13:41: Roughing.

Thursday, May 12, 2022, 13:46: Halt. 

Friday, May 13, 2022, 07:05: Roughing. 

Friday, May 13, 2022, 07:18: TP1 on.

Friday, May 13, 2022, 07:23: Up to 14 KRPM. Pause/Halted startup (Whining?). Slow start w/ vacuum group.

Process to perform a TP slow start:

- Hold both top buttons on the controller for about 3 seconds

- Right Yes/No left to continue. 

- Advance to soft start - 20 min. 

- Back to remote start & go.

Friday, May 13, 2022, 08:26: TP1 on w/ slow start.

Friday, May 13, 2022, 08:39: 13 KRPM & climbing.

Friday, May 13, 2022, 09:10: TP at full speed. 38 KRPM. 0.5A 9w. This pump whines, but is operating fine. Likely will switch again when another is available. (It appears to have been dropped, Noted by Edi. Likely when shipped) 

Friday, May 13, 2022, 09:14: TP off. Slow start function off. Back to normal function. 

Setup in vacuum over the weekend.

Monday, April 25, 2022, 08:31 IGP1:6.7e-7T . Ramping up 1A/10s to 500A. 

Monday, April 25, 2022, 10:05 500A reached, waiting 1h. TC at 50degC

Monday, April 25, 2022, 10:59 TC at 58degC. Ramping down 1A/10s to 0 A. 

Monday, April 25, 2022, 13:37 TGHT at 0A , venting system. 

Thursday, April 21, 2022, 09:43

TaC coated Target container was placed in Evaporator 2 yesterday and left pressuring down.

Ta Heatshields: 3

Target temperature on OMEGA = 1800-1850 C

OMEGA slope: 0.990

Target time at temperature = 4 hours

Target final TBHT current: 230A

Approximate final TGHT current: 420A (will adjust manually)

Heating autoramp started @ ~2A/min on both TGHT and TBHT

initial IGP1 = 9.3e-7 Torr

Thursday, April 21, 2022, 10:38

Pressure trending down after peak.  Start autoramp at 1A/min to 50A on both TGHT and TBHT.

Thursday, April 21, 2022, 10:56

Pressure continues to decrease.  Will ramp up faster @4A/min to 90A for both TGHT and TBHT.

Thursday, April 21, 2022, 11:07

Second peak has  begun to form .  Will keep at 90A awaiting stabilization

Thursday, April 21, 2022, 11:35

pressure stable.  Continue to autoramp at 1A/min and if pressure stable increase ramp to 4A/min

Thursday, April 21, 2022, 11:49

small peak observed and stabilizing.  Autoramp @ 6A/min to 400A on TGHT and to 230A on TBHT

Thursday, April 21, 2022, 12:35

Regression plot .  1800C should be reached ~1800C. 

Thursday, April 21, 2022, 12:44

Target current reached. 

OMEGA = 1762 C

Will manually bump current to 415 A

OMEGA = 1802 @ 415 A @ 12:51 pm

Thursday, April 21, 2022, 16:50

 OMEGA=1823 C

IGP1= 2.9e-06 Torr

TGHT= 417 A, 7.2 V

TBHT= 232A, 3.0V

Rampdown will start at -2A/min for both TGHT and -1A/min TBHT

 Thursday, April 14, 2022, 10:36 Setup, PEEK samples installed on heatshield with TC. Pump down over the weekend.

Sunday, April 17, 2022, 10:37 Vacuum 3e-7T, ramp up TGHT 1A/10s to 500A 

Sunday, April 17, 2022, 12:00 500A reached, waiting 1hour. TC at 42degC. 

Sunday, April 17, 2022, 12:57 after 1h, TC at 45degC. Ramping down 1A/10s. Vacuum 2.7e-6Torr.

Sunday, April 17, 2022, 14:33 ramped down to 0A. Turning off turbo and venting. 

Old HS sprang a leak in the copper tubing.  

HS#44378-15

Tuesday, April 12, 2022, 13:35: Roughing. 

Tuesday, April 12, 2022, 13:49: TP1 switched on. 

Tuesday, April 12, 2022, 13:57: TP1 stable (green).

Tuesday, April 12, 2022, 14:10: Vacuum @ 3.71e-05T & dropping.

Tuesday, April 12, 2022, 14:11: HS waterline opened. 

Tuesday, April 12, 2022, 14:12: Vacuum @ 3.32e-05T.

Tuesday, April 12, 2022, 14:22: Vacuum @ 2.19e-05T (Stable).

Wednesday, March 23, 2022, 10:49

Ta HP-FEBIAD was coated with TaC and wrapped with Ta heat-shields (3.5 layers) (two pieces around the fins only and 3 layers around the whole )

Desired temperature = 1800 C , TBHT will be set fixed at 230A (max).  TGHT expected to reach desired Temperature @~700A

Evap 2 was pumped down over previous night

Good vacuum = 3.00 e-4 Torr

Bad vacuum = 5.00 e-2 Torr

IGP1= 1.2 e-06 Torr

Start autoramp @0.5 A/min to 60 A

 Wednesday, March 23, 2022, 11:37

Increase autoramp to 1A/min to 60A for both TGHT and TBHT

Wednesday, March 23, 2022, 12:24

Pressure increasing at 60A so will leave at this current until pressure drops

Wednesday, March 23, 2022, 13:32

IGP1 = 2.9e-06 Torr

Will autoramp at 0.5A/min to 90A both TGHT and TBHT

Thursday, March 24, 2022, 16:35

1800C reached at 724A TGHT .  TBHT @ 230A.  Will keep at this temperature for 4 hours. 

Thursday, March 24, 2022, 20:20

 IGP1 = 6.9 e-06 Torr

OMEGA= 1828 C

TGHT = 724 A, 11.6 V

TBHT = 232.8 A, 3.1 V

Will start ramp-down at 2035 @ -2A/min TGHT and -1A/min TBHT

 Wednesday, March 09, 2022, 06:25

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

Desired temperature = 1800 C , TBHT will be set fixed at 230A (max).

Evap 2 will be pumped down over previous night

Good vacuum = 3.00 e-4 Torr

Bad vacuum = 5.00 e-2 Torr

IGP1= 1.2 e-06 Torr

Start autoramp @1A/min to 60 A

Wednesday, March 09, 2022, 09:29

 TGHT= 60 A 0.67 V

TBHT = 60A 0.59V

IGP1= 1.77e-6 Torr

autoramp @ 2A/min to 120 A and monitor (both TGHT and TBHT)

Wednesday, March 09, 2022, 10:19

IGP1 was increasing to fast.  Manually lowered current to 105A on both TGHT and TBHT.

Will allow pressure to stabilize

Plant group requested maintenance work for EF12/13

Therefore, keeping system as is until further instructions from plant group.

Thursday, March 10, 2022, 15:18

Will resume ramp up to 120 A for both TGHT and TBHT @ 1A/min

 IGP1= 6.4 e-07 Torr

Thursday, March 10, 2022, 15:30

Increase ramp rate to 2A/min 

Thursday, March 10, 2022, 17:41

@ 245 A TGHT and 230A TBHT ramp back down to 100 A for both as OMEGA not displaying Temperature.  Will need to go in tomorrow to fix OMEGA 

Friday, March 11, 2022, 14:25

Ramping at 2A/min to 230A for both TGHT and TBHT

Friday, March 11, 2022, 15:17

IGP1= 1.23e-6 Torr

Continue Ramping TGHT @ 3A/min to 400 A keep TBHT at 230A

Friday, March 11, 2022, 22:22

@ TGHT 725 A 1800 C was reached on OMEGA

Kept there since 7:20 pm.  Start rampdown at 11:20 pm.

Friday, March 11, 2022, 23:19  

 IGP1= 6.9e-6 Torr

OMEGA= 1805C

TGHT= 725 A, 10.9V

TBHT= 232A, 3.1V

Start rampdown at -2A/min on TGHT and -1A/min for TBHT

Wednesday, February 09, 2022, 06:55 

Target boat with a layer of niobium foil on the bottom used to heat up Nb samples to 1400 C for 4 hrs.

OMEGA slope = 0.99

The niobium samples are wrapped in a layer of  Nb foil.

Boat is wrapped with 2 layers of Nb foil.

Good vacuum 3.00e-02 Torr

Bad vacuum 5.00e-02 Torr

Autoramping TGHT at 2A/min to 200A, then monitor until desired temperature

Initial IGP1=6.0e-06 Torr

Tuesday, February 15, 2022, 12:44

Increasing ramp up to 3A/min to 220 A as pressure very stable

Tuesday, February 15, 2022, 14:04

ramped up manually to 1400C

IGP1 =3.9 e-06 Torr

TGHT = 340A, 5.5V

OMEGA = 1400 C

Tuesday, February 15, 2022, 14:21

Temperature on OMEGA up to 1413 C

Lowering current to 332A , OMEGA = 1400 +/- 5C

Wednesday, February 16, 2022, 11:43

On Tuesday February15, 2020 @18:04 started ramp down @-3A/min

Thursday, February 10, 2022, 08:52 

Total number of foils: 528 ( including 10 analysis discs)

Weight without springs = 1521.9 g (includes heatshields and T bar)

Total length packed 18.1 cm (including 10 analysis discs that will be removed)

container has 3 Ta heat shields.

No endcaps inserted to facilitate out-gassing

Ta coated spring at  ends

Initially to ramp TGHT and TBHT to 50A at0.5 A/min

Then heat automatically heat to OMEGA ~1400 C , then continue to max 530A on TGHT and 230A on TBHT (Omega slope set = 0.990)

Then temperature = 1800C

TBHT will be set fixed at 230 A (max).  TBHT heated manually and automatically to max.

Good vac at 3.00 e -4 Torr

Bad vac at 5.00 e-2 Torr

 IGP1= 1.0 e-06 Torr at start of initial ramp

IGP1 = 5.7 e-06 Torr

TGHT = 50.0 A, 0.6 V

TBHT = 50.0A, 0.5 V

continue to ramp up at 0.5A/min to 200A

Friday, February 11, 2022, 07:59 

IGP1=3.0e-07 Torr and stable

TGHT= 201A, 2.8V

TBHT = 201A, 2.6V

continue autoramp at 1A/min to 230A on TBHT and 450A on TGHT

Friday, February 11, 2022, 12:41

IGP1= 6.6e-05 Torr

TGHT= 450A, 6.5V

TBHT= 232A, 3.1V

OMEGA = 1258C

Allowing pressure to drop.  Will continue ramp up when [pressure around 9-e-6 Torr

Friday, February 11, 2022, 13:59

IGP1= 2.4e-05 Torr

Will ramp up at 1A/min to 550A on TGHT

Friday, February 11, 2022, 15:54  

IGP1= 2.4e-05 Torr

TGHT= 551.0A, 8.3V

TBHT=232A, 3.2V

OMEGA= 1426 C

ramp to 600 A @ 2A/min

Friday, February 11, 2022, 16:23

TGHT= 600.1A, 9.3V

TBHT= 232A, 3.2V

OMEGA = 1612C

ramp to 689 @2A/min to 1800 C as projected in regression plot attached 

Friday, February 11, 2022, 21:20 

Evap has been at 1800 +/- 20 C for 4 hours and 10 minutes

OMEGA 1802 C

TGHT = 689 A, 11.0V

TBHT=232.8 A, 3.26V

IGP1= 1.3e-05 Torr and stabilizing.  

will start cool down at -2A/min TGHT and -1A/min TBHT

Wednesday, February 09, 2022, 06:55 

Target boat with a layer of niobium foil on the bottom used to heat up Nb samples to 1100 C for 4 hrs.

OMEGA slope = 0.99

The niobium samples are wrapped in a layer of  Nb foil.

Boat is wrapped with 2 layers of Nb foil.

Good vacuum 3.00e-02 Torr

Bad vacuum 5.00e-02 Torr

Autoramping TGHT at 3A/min to 180A, then monitor until desired temperature (based on eLog 550)

Initial IGP1=9.9e-07 Torr

Wednesday, February 09, 2022, 08:00

TGHT = 225 A, 3.2V

IGP1=  1.17e-06 Torr

OMEGA= 1100C +/- 12C fluctuations 

Wednesday, February 09, 2022, 11:55

TGHT=  225 A, 3.3 V

IGP1= 9.7e-07 Torr

OMEGA=1100C +/- 10C fluctuations

Wednesday, February 09, 2022, 11:56

Start cooling @-2A/min 

 The Helicoil had mostly pulled out of the old one.

Thursday, November 25, 2021, 13:58: Insulator replaced. EVAP 2 is ready for use with ISAC targets.

Ta#63 LP-SIS target description: 

Total Ta foils = 470 [6x20 packs + 350 single discs]

Foil Thickness = 0.025mm

Target density = 15.38 g/cm3

Target length = 3.4 cm

Total Mass = 52.296 g [Incl foils + Ta wire on 6 packs]

Total mass w/ Target oven= 457 g (w/ end caps)

Discs in target are arranged as follows: 1pack / 75 singles / 1pack / 100 singles / 2packs / 100 singles / 1pack / 75 singles / 1pack

End caps installed (Not expanded). No Ta foil heat shield added

https://elog.triumf.ca/TIS/Target+Production/114

TBHT will be ramped up to 230A 

TGHT will be ramped up to 600A +

Final desired temperature = 1900C.

OMEGA slope = 0.98.

Wednesday, November 10, 2021, 18:05: Roughing. 

Wednesday, November 10, 2021, 18:14: Omega Laser set. On end cap / ok. Slope = 0.980 

Wednesday, November 10, 2021, 18:24: Turbo pump on.

Wednesday, November 10, 2021, 18:25: RV1 valve hissing. Stop TP. Reset, open / close RV1 multiple times. Hissing stopped on its own. Won't affect the pump down, letting pressure out, not in. Will need to replace later.

Wednesday, November 10, 2021, 18:27: Turbo pump on. 

Wednesday, November 10, 2021, 18:32: TP ok. PS on. 

Thursday, November 11, 2021, 11:08: Vacuum @ 4.56e-07T. Auto ramping TGHT / TBHT to 580 / 230 A @ 2A per minute.

Thursday, November 11, 2021, 13:49: TGHT / TBHT @ 313 / 230 A. Vacuum @ 1.46e-06T. Temperature @ 1051 C. Auto ramp continues.

Thursday, November 11, 2021, 16:55: TGHT / TBHT @ 580 / 230 A. Vacuum @ 5.11e-06T. Temperature @ 1621 C. Auto ramp TGHT to 610 A @ 2 A per min.

Thursday, November 11, 2021, 17:13: TGHT / TBHT @ 610 / 230 A. Vacuum @ 6.54e-06T. Temperature @ 1670 C. Auto ramp TGHT to 630 A @ 2 A per min.

Thursday, November 11, 2021, 17:32: TGHT / TBHT @ 630 / 230 A. Vacuum @ 7.82e-06T. Temperature @ 1709 C. Auto ramp TGHT to 650 A @ 2 A per min. 

Thursday, November 11, 2021, 18:49: TGHT / TBHT @ 650 / 230 A. Vacuum @ 7.40e-06T. Temperature @ 1758 C. Auto ramp TGHT to 665 A @ 2 A per min. 

Thursday, November 11, 2021, 19:02: TGHT / TBHT @ 665 / 230 A. Vacuum @ 8.37e-06T. Temperature @ 1790 C. Auto ramp TGHT to 685 A @ 2 A per min. 

Thursday, November 11, 2021, 19:22: TGHT / TBHT @ 685 / 230 A. Vacuum @ 9.56e-06T. Temperature @ 1830 C. Auto ramp TGHT to 700 A @ 2 A per min. 

Thursday, November 11, 2021, 19:41: TGHT / TBHT @ 700 / 230 A. Vacuum @ 1.18e-05T. Temperature @ 1870 C. Manually tap up to 705 A

Thursday, November 11, 2021, 19:43: TGHT / TBHT @ 705 / 230 A. Vacuum @ 1.25e-05T. Temperature @ 1885 C. Manually tap up to 710 A

Thursday, November 11, 2021, 19:44: TGHT / TBHT @ 710 / 230 A. Vacuum @ 1.34e-05T. Temperature @ 1890 C. Manually tap up to 715 A 

Thursday, November 11, 2021, 19:46: TGHT / TBHT @ 715 / 230 A. Vacuum @ 1.75e-05T. Temperature @ 1898 C. Manually tap up to 717 A

Thursday, November 11, 2021, 19:46: TGHT @ 717 A. Temperature @ 1901 C. Temperature reached.

Thursday, November 11, 2021, 19:48: Begin auto-cooling @ 2 A per min.

Friday, November 12, 2021, 06:13: PS off. TP1 off. 

Monday, November 08, 2021, 09:35

Two groups of 4 caps wrapped in graphite with graphite discs in between. 

Two TaC coated springs at either end of the boat.

Target temperature = 1800 C

Expected around 430 TGHT

Good Vacuum 3e-03 Torr

Bad Vacuum 5e-02 Torr

Evap two was left pressuring down over weekend.

Monday, November 08, 2021, 09:35

Starting autoramp to 40 A at 1A/min

TGHT = 2.5e-07 Torr

Monday, November 08, 2021, 10:57

IGP1 = 8.5e -06 Torr and dropping

set autoramp to 50A at 1A/min

IGP1 1.0e-05 Torr and dropping

Set TGHT to autoramp to 90 A @ 1A/min and leave until pressure below 9e-06 Torr

Monday, November 08, 2021, 15:09

IGP1= 9.6e-06 Torr

Start autoramp to 400A at 2A/min 

Monday, November 08, 2021, 17:37

TGHT = 377 A, 6.1V

OMEGA= 1234 C

Monday, November 08, 2021, 17:58

OMEGA = 1292 (cannot trust )

400A, 6.3 V

1.4 e-05 Torr

 Autoramp @ 1A/min to 425A

Will heat to 425A and keep there for four hours

Monday, November 08, 2021, 22:02

TGHT=420A, 6.7V

IGP1= 7.0e-06 Torr

Start ramp down at -2A/min 

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

Note:  placed tantalum foil heatshield on both sides of the copper heatshield assembly.

Desired temperature = 1800 C (expected TGHT ~430 A), TBHT will be set fixed at 230A (max).

Evap 2 was pumped down yesterday

Good vacuum = 3.00 e-03Torr

Bad vacuum = 5.00 e-02 Torr

Wednesday, November 03, 2021, 09:27

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

IGP1 initial:  5.3 e-07 Torr

Wednesday, November 03, 2021, 10:22

IGP1= 1.1 e-05 Torr

TGHT = 40 A, 0.5 V 

TBHT= 38.5 A, 0.41 V

Will keep while monitoring pressure at 0.5 A/min to 60A

Wednesday, November 03, 2021, 10:35

IGP1 pressure trending down

IGP1= 6.7 e-06 Torr 

Start ramp up to 60A at 0.5A/min

Wednesday, November 03, 2021, 11:24

IGP1 2.6 e-06 Torr and trending down

Start ramp up to 400A on TGHT and 230A on TBHT at 1A/min

Wednesday, November 03, 2021, 13:28 

 IGP1= 1.4e-05 Torr and trending down slowly.  Will increase ramp speed to 1.5A/min on both TGHT and TBHT to the same final current as before.

Wednesday, November 03, 2021, 15:56 

 IGP1= 2.1 e-05 Torr

TGHT = 400 A,  6.9 V

TBHT = 233 A, 4.1 V

 OMEGA = 1645 C

Will manually ramp up to 1800 C

Wednesday, November 03, 2021, 16:43 

 TGHT = 450 A, 7.9 V

TBHT = 233 A, 4.1 V

OMEGA = 1770 C

IGP1 increasing in Pressure.  Will leave for 4 hours at this current.

Wednesday, November 03, 2021, 20:48

IGP1= 1.0 e-05 Torr

TBHT= 233A, 4.1 V

TGHT = 450 A, 7.9 V

OMEGA = 1751 C

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

 Monday, November 01, 2021, 07:37

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

Note* on the leading end of the assembly I placed tantalum foil heatshield similar to what I previously observed there.  I believe it may impact temperature at the entrance of the container tube. 

Desired temperature = 1800 C (expected TGHT ~430 A), TBHT will be set fixed at 230A (max).

Evap 2 was pumped down over the weekend

Good vacuum = 3.00 e-03Torr

Bad vacuum = 5.00 e-02 Torr

Monday, November 01, 2021, 07:39

Starting autoramp at 1 A/min to 40 A on both TGHT and TBHT 

IGP1= 3.5 e-07 Torr

Monday, November 01, 2021, 09:08

 IGP1= 1.6 e-06 Torr

TGHT = 40A, 0.99 V

TBHT = 39A, 1,2 V

Start autoramp @ 1A/min for both TGHT and TBHT to 400A and 230A respectively.

Monday, November 01, 2021, 14:33

OMEGA= 1545 C

TGHT =  354 A, 6.0 V

TBHT = 233 A, 4.8 V

IGP1= 1.7 e-05 Torr

increase ramp rate to 2A/min

Monday, November 01, 2021, 14:44 

OMEGA= 1585C

TGHT =  367A, 6.3 V

TBHT = 233 A, 4.8 V

IGP1= 1.7 e-05 Torr

Monday, November 01, 2021, 14:49

OMEGA= 1604 C

TGHT =  377A, 6.5V

TBHT = 233 A, 4.8 V

IGP1= 2.1 e-05 Torr 

Monday, November 01, 2021, 14:53 

OMEGA= 1624C

TGHT =  384 A, 6.6V

TBHT = 233 A, 4.8 V

Monday, November 01, 2021, 15:00

OMEGA= 1660C

TGHT =  400 A, 6.8V

TBHT = 233 A, 4.8 V

IGP1= 2.4 e-05 Torr 

Monday, November 01, 2021, 15:17

Initiate autoramp to 430A on TGHT @2A/min

Monday, November 01, 2021, 16:34 

 OMEGA = 1750 C

TGHT = 430 A, 7.3 V

Better heat insulation than before.  Next time need to place a Ta heatshield at the other end on the copper assembly.  Will raise T to 435 A and keep until 1930  hours.

Monday, November 01, 2021, 20:23

IGP1= 1.6 e-05 Torr

Omega = 1760 C

TGHT= 436 A, 7.4 V

TBHT = 232 A, 4.8 V

* Note: kept a approx 1 hour extra hoping that pressure would drop further

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

Coating looks reasonably good.  

 Wednesday, October 27, 2021, 11:07

Monday, October 25, 2021, 11:52

Ta LPSIS 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 will be pumped down over previous night

Good vacuum = 3.00 e-3 Torr

Bad vacuum = 5.00 e-2 Torr

Initial total weight = 464.8 g

Final weight after sintering = 

 Thursday, October 28, 2021, 07:46

IGP1= 7.4e-07 Torr

Initiating autoramp to 40 A on both TGHT and TBHT

ramp rate = 1 A/min

Will keep at 40A for approximately 1 hour or until pressure below 1e-05 Torr

 Thursday, October 28, 2021, 09:41

IGP1= 1.9e-06 Torr TGHT = 40.3 A, 0.48 V TBHT = 39.0 A, 0.48V

Autoramp @ 1A/min to 100A on both TGHT and TBHT

 Thursday, October 28, 2021, 12:57

IGP1= 1.1e-06 Torr

TGHT = 100 A, 1.3 V

TBHT = 100 A, 1.2 V

Start autoramp at 2A/min to 400 for TGHT and 230 for TBHT

The current from the plot (below) required to reach 1900 C seems too high.

Will take to 430 A as previous.  The slope was chequed previously.  Need to check OMEGA.

Thursday, October 28, 2021, 20:08

IGP1=  3.34 e-06 Torr

TGHT = 430A , 7.2 V

TBHT = 233A, 4.1V

OMEGA  = 1628C

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

	44691-3 TaC coating
		TGHT		TBHT			Temperature (C)	Current (A)
	Temperature ( C )	Voltage (V)	Current (A)	Voltage (V)	Current  (A)		1900	512.88
	1250	3.90	255.0				1700	434.06
	1302	4.30	279.0				1800	473.47
	1343	4.60	294.0
	1423	5.10	325.0
	1484	5.7	348.0
	1555	6.2	377.0
										Slope	2.537
										Y intercept	598.66
										R2	0.999