Thursday, January 30, 2025, 09:17

Left to pump down on previous night

The coated container was wrapped in 4 Ta foil heatshields.

Vacuum IGP1 initial =8.1 e-06 Torr

Target temperature on OMEGA= 1850-1900 C

OMEGA slope:= 0.990

Target time at max temperature = 4 hours

Final Current TBHT= 230 A

Final TGHT current= ~500A (adjustable)

Heating autoramp starged at 0.5A/min(1A/120s) to 60A on both TGHT and TBHT

Then at 0.5A/min  to 90 A, both TGHT and 230A TBHT

When pressure stable will ramp at 2A/min to ~500A on TGHT and 230A on TBHT

Good vacuum = 5.0 e-04 Torr

Bad vacuum = 5.0E-02 Torr

Thursday, January 30, 2025, 09:20

currently ramping to 90A

Thursday, January 30, 2025, 12:30

Ramping to 120A @ 0.5 A/min

Thursday, January 30, 2025, 13:59

Ramping to 140 A at 1A/min (to check pressure change.  So far with slower heating, pressure has not spiked very high).

Thursday, January 30, 2025, 15:59

Started ramping @ 2A/30s to 500 A on TGHT

TBHT is at 230A

Thursday, January 30, 2025, 21:25

Target was sintered when OMEGA reading 1700-1750 C

At 640-660A on TGHT RD

Check target coating and repeat these setting if good.

Thursday, January 30, 2025, 21:43

Cooling started at -2A/min on TGHT and -1A/min TBHT