Wednesday, December 06, 2023, 09:47
Target number of foils:370
Analysis discs 16 A and 16B interspersed on the end further from the laser
A are discs produced using new method and B are discs produced using milling.
Total length packed 16 cm (excluding the analysis discs)
container has 3 Ta heat shields (one inner around fins and center block, new type of 1st shield made up of three pieces)
No endcaps inserted to facilitate out-gassing
Ta coated spring at front end
ramp to 120A @ 1A/min TGHT and to 120A on TBHT hold there until pressure drop, then ramp to 500A on TGHT and 230A TBHT.
max approx 700A on TGHT and 230A on TBHT (Omega slope set = 0.990)
Then temperature = 1800C
TBHT will be set fixed at 230 A (max). TBHT heated manually and automatically to max.
Good vac at 5.00 e -4 Torr
Bad vac at 5.00 e-2 Torr
IGP1= 1e-06 Torr at start of initial ramp.
Wednesday, December 06, 2023, 09:56
System left to drop pressure over previous night and now at 120A. waiting for pressure drop.
Wednesday, December 06, 2023, 11:18
increased ramp rate to 2A/min
Wednesday, December 06, 2023, 14:41
increased ramp to 3A/min on TGHT and stopping to allow pressure to stabilize before taking temperature readings
Top temperature 1800C at 710 A but started dropping. Increased current to 750A and left there for 4 hours.
Cool down at -2A/min TGHT and -1A/min TBHT
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