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Friday, July 04, 2014, 10:13
Target boat contains 4 set of samples. Each sample consists of 5pack ThO2/Nb. (see photos).
The container is wrapped with 3 layers of heat shield.
TGHT will be ramped up to 520A at 0.1A/min.
Chamber has been pumped over night, pressure at 4.20e-6 Torr.
The purpose of this test:
1. Will the Ta- target boat survive at that current?
2. How will ThO2 sintered? Shrinkage? Grain-growth? mass loss? density? SEM will be done later.
3. How will the pressure behave at the max operating temperature (or current)?
Friday, July 04, 2014, 12:29
Stepped up TGHT to 40A, Vac went to max at 3.5e-5 Torr and is coming down.
Auto-ramping initiated.
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