Friday, June 03, 2022, 06:24

A loaded graphite cartridge was set in a tantalum boated and wrapped with 3 tantalum sheets (previous day)

IGP1 = 1.4 e-6 Torr

Good vacuum = 5e-2 Torr

Bad vacuum = 5e-1 Torr

Current ramp is 1A per 10s from 0A  to 80A at 1A/10s.  Then at 1A/min to 120 A, allow degas and then autoramp 1A/10s from 120A to (450-550A)

Friday, June 03, 2022, 06:52

starting autoramp at 1A/min to 120A

Friday, June 03, 2022, 07:30

note*: At approximately 108A the pressure did not rise again but was stable.

Friday, June 03, 2022, 07:46

started autoramp at 1A/10s to 450A 

Friday, June 03, 2022, 09:29

start autoramp to 500A at 1A/min

Friday, June 03, 2022, 09:40

pressure keeps stable as ramping continues. 

increased ramp rate to 2A/min

Friday, June 03, 2022, 09:56

Drop in pressure observed as current increased at 2A/min.

Final current is 490A.  Will keep at this current for 4 hours. 

Friday, June 03, 2022, 14:05

Start auroramp to 400A at -2A/30s

will keep at 400A for 8 hours

Friday, June 03, 2022, 22:06

Start autoramp down at -2A/min to 0A

IGP1= 1.6e-06 Torr

TGHT= 400A, 3.6 V