Tuesday, September 12, 2023, 09:51
The coated container was wrapped in 3 Ta foil heatshield and left in evap2 over night to attain vacuum.
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= ~700A (adjustable)
Heating autoramp starged at 1A/min on TGHT and TBHT to 120A
Then at 2 A/min to =400 A TGHT and 230A TBHT
Good vacuum = 5.0 e-04 Torr
Bad vacuum = 5.0E-02 Torr
Initial IGP1= 2.7e-06 Torr
Tuesday, September 12, 2023, 7:00
Started autoramp @1A/min to 120A on both TGHT and TBHT
Tuesday, September 12, 2023, 09:53
Heating ramp set to 230A for both TGHT and TBHT. Rate at 2A/min for both heaters.
Tuesday, September 12, 2023, 11:21
Continued ramp on TGHT at 2A/min to 335A and now setting to 3A/min (1.5A/30s)
Tuesday, September 12, 2023, 11:47
| |
TGHT |
|
| Temperature ( C ) |
Voltage (V) |
Current (A) |
| 1205 |
5.5 |
392.0 |
Continue ramping @3A/min on TGHT
Tuesday, September 12, 2023, 13:33
Reached 1840 C at TGHT =677A and 10.5V
Will keep for 4 hours |