Thursday, September 17, 2020, 16:10

An LP-SIS was wrapped with 3 Ta layers, and installed in the EVAP2

Desired temperature= 1900 C, Omega Slope = 0.990

Friday, September 18, 2020, 10:56

IGP1 = 4.4e-7 Torr 

Leak check performed, no leak observed

Friday, September 18, 2020, 11:16

Power supplies on.

Good vac at 3.00e -5 Torr

Bad vac at 5.00e-5 Torr

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

 Friday, September 18, 2020, 11:21

Autoramp paused because, TBHT is not ramping

Ramping manually current to 10 A in 0.5 A steps

Friday, September 18, 2020, 11:38

Restarted autoramp  (Autoramp at 0.5A/min to 400A on TGHT and 230A on TBHT)

Friday, September 18, 2020, 22:50

IGP1 = 2.04e-6 Torr 

TGHT = 5 V, 322.8 A

TBHT = 4 V, 233.1 A

Omega = 1459 °C

Autoramp changed to 0.2 A/min to 450 A

Saturday, September 19, 2020, 10:49

IGP1 = 8e-7 Torr

TGHT = 7.3 V, 449.1 A

TBHT = 4 V, 233.1 A

Omega = 1789 degC

 Saturday, September 19, 2020, 13:25

IGP1 = 6.5 e-7 Torr

TGHT  7.2 V, 447.975 A

TBHT = 4.08 V, 233.09 A

Omega = 1785 °C

Saturday, September 19, 2020, 13:26

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

Monday, September 21, 2020, 09:16

Turning off pumps 

Monday, September 21, 2020, 16:47

EVAP2 was vented with air and the tantalum oven was removed, the coating seems sintered.