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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