Thursday, August 05, 2021, 11:10

Total number of foils: 380

Total length packed 13.5 cm

container has 3 Ta heat shields.

No endcaps inserted to facilitate out-gassing

Two Ta discs at either end and three graphite discs as separators 

[Left end [ blade--no blade--blade---no blade]  Right end ]

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

Then heat manually to OMEGA ~1400 C , ramping TGHT manually and automatically  to reach 430A A (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 -5 Torr

Bad vac at 5.00 e-5 Torr

Total weight into Evap2 =503.8 g

Friday, August 06, 2021, 11:33

IGP1= 8.3e-07 Torr

Start heating at 0.5 A/min on both TGHT and TBHT up to 50A

Friday, August 06, 2021, 22:34

 IGP1= 7.0e-06 Torr

TGHT= 50.1 A, 0.6 V    TBHT = 50.0A, 0.6V

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

Saturday, August 07, 2021, 10:11

Stopped autoramping.  Will allow some time at 63 A on both TGHT and TBHT

Saturday, August 07, 2021, 12:19

IGP1= 1.9e-05 Torr

Manually increase TGHT and TBHT to 65 A 

Saturday, August 07, 2021, 23:01

IGP1= 5.8e-06 Torr

TGHT= 64.5 A, 08V  TBHT=64.6A, 0.8V

Ramp up manually while monitoring pressure 

Sunday, August 08, 2021, 08:46

IGP1= 6.0e-06 Torr

TGHT = 69A, 0.85V  TBHT = 69A, 0.90V

ramp up manually  

Monday, August 09, 2021, 08:54 

IGP1= 1.38e-05 Torr

TGHT= 90.0 A, 1.1V, TBHT= 90.0A 1.3V

Start autoramp at 0.5 A/min on both TGHT and TBHT to 400A and 230A respectively.

Changed bad vacuum to 5e-04 Torr

Monday, August 09, 2021, 21:37

IGP1= 6.6e-06 Torr

TGHT= 300.3 A, 5.0 V, TBHT = 233.0 A, 4.1V

 Increase ramp rate to 2A/min for TGHT to 400 A,

OMEGA = 1430 C

Monday, August 09, 2021, 22:09

Will autoramp at 2A/min up to 424A as per regression line on attached file 

Monday, August 09, 2021, 22:58

Temperature drop on OMEGA.  Unexpected.  Will lower current on TGHT to 418A and keep there for 4 hours.  OMEGA may not be reliable 

Tuesday, August 10, 2021, 3:16

IGP1=8.8e-07 Torr

TGHT = 414A, 7.5V TBHT = 233A, 4.1V

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

Tuesday, August 10, 2021, 10:35

IGP1= 3.6e-07 Torr

Dismount

Some discs, especially end sections were coated with a golden layer.  

 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) 

 Wednesday, September 08, 2021, 12:36

297 C discs were loaded onto a Ta tube wrapped in 3 Ta heatshields. (10 of which are analysis discs).  They should be the first to be pushed out as they were loaded last.

The discs were loaded upside down to facilitate transfer to final container post conditioning.

a Ta foil disc was placed at the front end and a Ta spring at the back end of the tube.

The weight of the whole system is 254.4 g

Evap 2 was left to reduce pressure overnight.

Target temperature is 2000 C for five hours @ approx 450A

Good vacuum = 3e-2 Torr

Bad vacumm= 5e-2 Torr

 Thursday, September 09, 2021, 08:46IGP1= 7.5 e-07 Torr

Will manually ramp up TGHT to 80 A 

Thursday, September 09, 2021, 09:09 

pressure began to rise at 50A so will leave at 50 A waiting for stabilization.

Current began to shoot up to rapidly, lowered current to 40A.  

Thursday, September 09, 2021, 10:34

At IGP1= 1.3e-4 Torr manually increasing current again 

Thursday, September 09, 2021, 12:52 

IGP1= 8.6e-5 and dropping

TGHT = 60A, 0.87 V

Will begin autoramp to 120A at 1A/min

Thursday, September 09, 2021, 14:06

IGP1= 3.2e-05Torr

TGH T= 120A, 1.9V

Set autoramp to 1A/10s to 200A 

Thursday, September 09, 2021, 14:57

IGP1=  1.5e-05 Torr

TGHT = 200A, 3.4V

Set Autoram to 2A/10s to 450A

OMEGA = 1249 C

 At 258A OMEGA = 1420 C

continue ramp up at 2A/10s to 450

projected 2000 C is 454 A

Thursday, September 09, 2021, 16:10 

Tapped up to 470 A and OMEGA 1993C.  Will leave at this current because T may rise.  

Thursday, September 09, 2021, 21:21

OMEGA 2011 C

IGP1 = 6.9e-06 Torr

Ramping down @ -1 A/min

Thursday, September 09, 2021, 17:27

Temperature kept around 2000 C by reducing current.  It was reduced to 455A and Temperature stabilized .  Time of ramp down will be  21:10 

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.

Thursday, October 21, 2021, 10:02

10 TaC coated Ta caps, wrapped in graphite foil.

2 TaC coated Ta springs .

All mounted inside a target boat with enclosed ends.

Good vacuum = 3.0 e-3 Torr

Bad vacuum = 5.0 e-2 Torr

Will heat up to 1800-1900 C and keep at Temp for four hours

OMEGA slope = 0.990

*Note that the turbo pump has been replaced and this is the first EVAP2 operation after replacement*

Thursday, October 21, 2021, 10:03

IGP1= 1.6 e-06 Torr

starting ramp up at  2 amp/min to 30 A on TGHT

Thursday, October 21, 2021, 10:46

Ramping to 40 A at 2A/min and will keep there for 20 minutes. 

Thursday, October 21, 2021, 11:19

 IGP1= 1.2e-05 Torr and dropping

Start ramp up to 400 A at 0.5A/min

Thursday, October 21, 2021, 18:58

Started ramping at 3A/min to 468A on TGHT

Thursday, October 21, 2021, 20:15

Current at 468.  Will keep there until pressure low enough.

Friday, October 22, 2021, 05:50

IGP1= 8.9 e-06 Torr

Start ramp down at -2A/min

 Monday, October 25, 2021, 11:47

Upon examination the caps and springs did not appeared coated.  The camera was not online so the current used was based on previous elogs.  It may have evaporated TaC due to over temperature.

The materials will be cleaned, recoated and resintered.

 Monday, October 25, 2021, 11:52

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 will be pumped down over previous night

Good vacuum = 3.00 e-3 Torr

Bad vacuum = 5.00 e-2 Torr

Initial total weight = 439.0 g

Final weight after sintering = 438.8 g

Tuesday, October 26, 2021, 07:18 

IGP1= 9.2 e-07 Torr

Will ramp to 50A at 1A/min on both TGHT and TBHT.

Tuesday, October 26, 2021, 08:37 

IGP1= 3.0 e-05 Torr

TGHT= 50.2 A, 0.6 V

TBHT = 49.4 A, 0.5 V

Will allow pressure to drop further then start further ramp up

Tuesday, October 26, 2021, 14:36

TGHT =  100 A, 1.3 V

TBHT = 99 A, 1.0 V

IGP1 = 3.e-5 Torr

ramp up TGHT to 400 A and TBHT to 230 A at 1.5 A/ min

Tuesday, October 26, 2021, 18:46 

 Will keep at 430A on TGHT and 230A on TBHT for 4 hours.

OMEGA reading = 1653  C is suspicious based on previous coating.  

Tuesday, October 26, 2021, 23:05

TGHT = 430.5 A, 6.9 V

TBHT = 232.09A, 2.8 V

IGP1= 8.8e-06 Torr

Start cooling THGT at -2A/min and TBHT at -1A/min 

 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

 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.  

 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 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 

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 

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 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

 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, 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

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

 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, 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

Thursday, June 09, 2022, 09:07

Yesterday, Wednesday June 08, 2022 @ ~3.00 pm a "dummy" target container was installed in EVAP 2 after the heatshield assembly had been swapped.

The purpose is to test correct functioning of the system.  Melting and evaporation on one of the bolts of the previous target container (eLog578) prompted the change in heatshield assembly and current testing.

TGHT was ramped up to 740A @ 4A/min, left to run at the final current for ~4.5 hours and then ramped down @-2A/min to 0A.

Will dismount dummy container this morning.

IGP1=2.5e-07 Torr

Thursday, June 09, 2022, 11:16

The target appears in good shape.  No abnormal behaviour. 

Picture attached are of the previous failed target eLog 578

Tuesday, June 14, 2022, 08:47

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

OMEGA slope= 0.990

Good vacuum = 3.00 e-4 Torr

Bad vacuum = 5.00 e-2 Torr

IGP1= 1.2 e-06 Torr

Start autoramp @2A/min to 80 A then autoramp heat @1A/min to 150 A.  Then autoramp TGHT to 675A and TBHT to 230A.

Tuesday, June 14, 2022, 08:49

IGP1= 0.13 Torr

*had timed out and it was off.  I RST and turned back on.*

Will wait for the pressure to drop to start heating

 Tuesday, June 14, 2022, 09:36

IGP1= 9.4e-06 Torr

Start autoramp @2A/min to 80A

Tuesday, June 14, 2022, 11:27

IGP1= 8.7 e-06 Torr Trending down. 

TGHT= 146A, 1.6V

TBHT= 146A, 1.7V

Has been ramping at 1A/min

Change ramp rate to 2A/min to 700A on TGHT and 230A on TBHT

Tuesday, June 14, 2022, 14:48

Change final current on TGHT to 675A, according to plot.  May change again. 

Currently TGHT=  537A, 7.7V 

IGP1= 4.4e-06 Torr

Tuesday, June 14, 2022, 18:46

Top temperature was 1825 Celsius at TGHT = 675A

Will start rampdown at 8:00 pm

 Tuesday, June 14, 2022, 20:01

TGHT= 675A, 10.3 V

TBHT= 230A, 3V

OMEGA= 1815C

IGP1= 3.9e-06 Torr

ramping down @-2A/min TGHT and -1A/min TBHT