Friday, March 28, 2025, 06:49

The coated container was wrapped in 4 Ta foil heatshields.

Vacuum IGP1 initial =8.0e-07 Torr

Target temperature on OMEGA= 1800-1850 C

OMEGA slope:= 0.990

Target time at max temperature = 4 hours

Final Current TBHT= 230 A

Final TGHT current= ~400A (adjustable)

Good vacuum = 5.0 e-04 Torr

Bad vacuum = 5.0E-02 Torr

Starting ramp at 2A/min

Friday, March 28, 2025, 09:41

At 412A readback on TGHT OMEGA reads 1702 C.  Maybe re-use of Ta heatshields resulted in loss of efficiency.  Will ramp to 420 A and leave for 4 hours.

Friday, March 28, 2025, 14:25

Started rampdown at -2A/min TGHT and -1A/min TBHT