Wednesday, April 28, 2021, 11:54
Total number of foils: 449 (not including analysis discs)
Total length packed 16.7 cm
5 extra analysis discs and 2 dr. Blade discs
container has 3 Ta heat shields.
No endcaps inserted to facilitate out-gassing
One Ta disc inserted at front 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 530A 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
Thursday, April 29, 2021, 10:09
IGP1 = 6.5 e-07 Torr
Start heating at 0.5 A/min to 50 A on both TGHT and TBHT
Thursday, April 29, 2021, 21:45
IGP1= 7.7 e-06
TGHT = 50.3A , 0.59 V
TBHT = 49.4 A, 0.56 V
Pressure is taking a while to equilibrate. Will wait a bit more to continue heating
Thursday, April 29, 2021, 23:49
IGP1 = 7.2 e-06 Torr
will start ramping at 0.5 A/min to 100 A
Saturday, May 01, 2021, 20:09
Friday, April 30, 2021, 08:19
IGP1 pressure higher than bad vacuum. Stopped autoramp. Will allow vacuum to come back down and restart ramp.
Saturday, May 01, 2021, 09:04
Yesterday the system had tripped. All pumps had turned off and the pressure was found at 0.005 torr
vacuum was restarted.
Current IGP1= 6.5e-07 Torr
Restarting heaters.
Autoramp at 0.5A/min to 20A on both TGHT and TBHT
Saturday, May 01, 2021, 10:48
IGP1=5.9e-7 Torr
TGHT = 20.0 A, 0.24V
TBHT = 20A, 0.20V
Autoramp at 0.5A/min to 40A both TGHT and TBHT
Saturday, May 01, 2021, 13:26
TGHT = 40.0 A, 0.47 V
TBHT= 39A, 0.44V
IGP1= 5.5 e-07 Torr
Autoramp at 0.5A/min to 60 A on both TGHT and TBHT
Saturday, May 01, 2021, 20:09
TGHT = 60.0 A, 0.72V
TBHT = 59.4 A, 0.69V
IGP1= 4.4e-07 Torr
Autoramp at 0.5A/min to 100 A on both TGHT and TBHT
Sunday, May 02, 2021, 18:30
IGP1= 1.7 e-06 Torr
TGHT =100A, 1.3V
TBHT = 99.9A, 1.3V
Autoramp both heaters at 0.25A/min to 120A and monitor
Sunday, May 02, 2021, 18:45
pressure increase to 4.1e-06 Torr. TBHT unexpectedly rose to 120A and was manually tapped back down to 104 A. Will keep both , TGHT and TBHT, at 104 A for a while.
Sunday, May 02, 2021, 19:50
Stepping at 0.5A/min to 105A then to 110 A on both TGHT and TBHT
Sunday, May 02, 2021, 22:10
Will leave both TGHT and TBHT at 110 A until pressure comes back down
currently IGP1= 1.3e-05 Torr
Monday, May 03, 2021, 09:35
IGP1= 2.2 e-06 Torr
Tapping TGHT and TBHT to 115A
Monday, May 03, 2021, 11:30
Tapping TGHT and TBHT to 120A @ 1A/min
Monday, May 03, 2021, 18:38
IGP1= 5.4e-06 Torr
TGHT = 130.3 A, 1.8 V
TBHT = 129.1 A, 1.8 V
Continue gradual ramping at 1A/min in increments of 5 A
Tuesday, May 04, 2021, 09:27
IGP1= 3.2e-5 Torr
TGHT = 400 A, 6.0V
TBHT = 232 A, 3.6V
OMEGA = 1104 C
waiting for pressure to drop then will continue heating
Tuesday, May 04, 2021, 17:27
TGHT = 420.1 A, 6.5V
TBHT= 232A, 3.6V
OMEGA = 1139 C
IGP1= 1.15e-5 Torr
will increase ramp up at 0.5A/min to 430A and hold (TGHT)
Tuesday, May 04, 2021, 22:43
TGHT= 430A, 6.6V
TBHT = 232.8A, 3.6V
OMEGA= 1157 C
IGP1=6.6e-6 Torr
Set Autoramp at 0.5A/min to 540 A (TGHT)
Wednesday, May 05, 2021, 08:09
IGP1= 7.5e-06 Torr
TGHT = 534 A, 8.5V
TBHT=232 A, 3.7 V
OMEGA = 1485
Continue ramp at 0.5A/min to to 600 A on TGHT
Wednesday, May 05, 2021, 15:07
IGP1=1.2e-5 Torr
TGHT=601A, 9.6V
TBHT= 232A, 3.7V
OMEGA =1600 C
ramp to 650A on TGHT at 0.5A/min
Wednesday, May 05, 2021, 20:05
Tapped TGHT to 694A, 11.4 V (manually)
TBHT= 232A, 3.7V
OMEGA = 1790 C
IGP1= 2.5e-05 Torr
Will monitor Pressure and temperature . Will start 4 hour count.
Wednesday, May 05, 2021, 22:03
OMEGA = 1765 C
TGHT = 694A, 11.5V
TBHT = 232A, 3.8 V
IPG1= 1.6e-05 Torr
Manually bumping TGHT to 700 A
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