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