 Thursday, August 05, 2021, 11:18, Darwin Ortiz Rosales, SiC, 44691-2, LP-SIS, Done, Dr blade and non-Dr blade Material Experiment (sintering) 
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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. |
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Thursday, September 02, 2021, 07:14, Darwin Ortiz Rosales, TaC, 44691-7, LP-SIS, Done, TaC coating/sintering
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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) |
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Wednesday, September 08, 2021, 12:43, Darwin Ortiz Rosales, , 44139-8-SK, TARGET BOAT, Done, C Conditioning
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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 |
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Tuesday, September 14, 2021, 09:33, Darwin Ortiz Rosales, , 42218-5, LP-IG-LIS, Done, TaC coating/sintering
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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. |
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Thursday, October 21, 2021, 09:58, Darwin Ortiz Rosales, TaC, , TARGET BOAT, Done, Coating of Ta caps and Ta springs (10 caps and 2 springs)
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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. |
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Monday, October 25, 2021, 11:53, Darwin Ortiz Rosales, TaC, 42218-4, HP-IG-LIS, Done, TaC coating/sintering
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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 |
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Wednesday, October 27, 2021, 11:09, Darwin Ortiz Rosales, Ta, 44691-3, LP-SIS, Done, TaC coating/sintering
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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
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44691-3 TaC coating |
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TGHT |
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TBHT |
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Temperature (C) |
Current (A) |
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Temperature ( C ) |
Voltage (V) |
Current (A) |
Voltage (V) |
Current (A) |
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1900 |
512.88 |
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1250 |
3.90 |
255.0 |
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1700 |
434.06 |
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1302 |
4.30 |
279.0 |
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1800 |
473.47 |
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1343 |
4.60 |
294.0 |
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1423 |
5.10 |
325.0 |
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1484 |
5.7 |
348.0 |
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1555 |
6.2 |
377.0 |
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Slope |
2.537 |
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Y intercept |
598.66 |
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R2 |
0.999 |
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Monday, November 01, 2021, 07:39, Darwin Ortiz Rosales, Empty, 44508-3, LP-SIS, Done, TaC coating/sintering
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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.
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Wednesday, November 03, 2021, 09:24, Darwin Ortiz Rosales, Empty, 44691-10, LP-SIS, Done, TaC coating/sintering
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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
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Monday, November 08, 2021, 09:36, Darwin Ortiz Rosales, Endcaps, , TARGET BOAT, Done, Coating of Ta caps and Ta springs (8 caps and 2 springs)
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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
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Wednesday, February 09, 2022, 08:08, Darwin Ortiz Rosales, Nb, , TARGET BOAT, Done, Nb annealing for Phillip
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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 |
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Thursday, February 10, 2022, 08:58, Darwin Ortiz Rosales, SiC, , HP-FEBIAD, Done,
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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
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Tuesday, February 15, 2022, 12:37, Darwin Ortiz Rosales, Nb, , TARGET BOAT, Done, Nb annealing for Phillip
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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
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Wednesday, March 09, 2022, 06:27, Darwin Ortiz Rosales, TaC, 42464-2, HP-FEBIAD, Done, TaC coating/sintering
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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
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Wednesday, March 23, 2022, 10:52, Darwin Ortiz Rosales, TaC, 44692-9, HP-FEBIAD, Done, TaC coating
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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
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Thursday, April 21, 2022, 09:45, Darwin Ortiz Rosales, TaC, 42218-2, LP-IG-LIS, Done, TaC coating
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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
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Wednesday, May 18, 2022, 09:59, Darwin Ortiz Rosales, SiC, 44692-9, HP-FEBIAD, Done, T-220516 Sintering SiC
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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.
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Tuesday, June 07, 2022, 07:31, Darwin Ortiz Rosales, SiC, 42464-2, HP-FEBIAD, Done, T-220524 Sintering SiC
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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 |
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Thursday, June 09, 2022, 09:09, Darwin Ortiz Rosales, Ta, , HP-FEBIAD, Done, Troubleshooting
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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
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Tuesday, June 14, 2022, 09:04, Darwin Ortiz Rosales, Ta, 37978-1, HP-FEBIAD, Done, TaC coating sintering
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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 |
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