Laura Lambert wrote: |
Wednesday, May 25, 2016, 11:37
Container coated with TaC using 'flushing technique' [cleaned ionizer tube with acetone, so no coating inside ionizer tube]
Wrapped with 2 x Ta heat shields - one full height of Ta foil wrapped around cooling fins twice
Currently pumping down in evap2
Thursday, May 26, 2016, 09:28
Tapped up manually to 40A
IGP1 = 6.6e-7 Torr
Initiating auto-ramp at 0.2A/min and 0.1A/min for the TGHT and TBHT respectively.
Final setpoints for TGHT = 650A and TBHT = 230A
Once max setpoints reached will continue to tap up manually while monitoring temperature to 1900C
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Tuesday, May 31, 2016, 11:09
TGHT at 615A/9.08V, temp = 1610C. Vacuum at 1.8e-7 Torr.
Tapping up TGHT to reach 1900C
Tuesday, May 31, 2016, 12:04
TGHT at 765A/11.90V. Temp at 1900C. Pressure is coming down from 8.7e-7Torr.
Will keep at this temperature for a day.
Wednesday, June 01, 2016, 15:22
Temperature has been stable at 1900C. Pressure is coming down from 3.4e-7 Torr.
Cooling down TGHT and TBHT at 2A/min and 1A/min, respectively.
Friday, June 03, 2016, 12:10
TGHT/TBHT at 0A. Target can be remained under vacuum until Monday.
Monday, June 06, 2016, 16:54
Target container was inspected; it looks good
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