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Friday, May 01, 2015, 10:27
Four different samples of ZrC are loaded into a target boat.
Sample A: ZrC + NO graphite / hand cut
Sample B: ZrC + NO graphite / laser cut
Sample C: ZrC + graphite / hand cut
Sample D: ZrC + graphite / laser cut
A picture showing the different samples is attached [one face-up/ one face-down sample of each side-by-side]
Each sample consists of ~20-25 discs, stacked together and wrapped in graphite sheet [see attachment for photo]
The target boat is wrapped with 3 x Ta heat shield.
EVAP1 pumped down overnight.
HS water valves were opened this morning, no leaks detected.
IGP1 = 5.5e-7 Torr.
Tapping up TGHT manually to 30A...
Friday, May 01, 2015, 10:54
Tapped up manually to 30A.
Over the course of 20min the vacuum climbed to IGP1 = 1.0 e-5 Torr.
Backed off TGHT to 20A to allow vacuum to stabilize.
Waited ~10min.
Vacuum dropped to IGP1 = 6.5e-6 Torr.
Tapped back-up manually to 30A.
Waited ~45min.
Vacuum stable, IGP1 = 1.2e-5 Torr.
Initiating auto-ramp at 0.1A/min for the TGHT with a max setpoint of 300A / 5.00V.
Good Vacuum = 3.00e-5 Torr. Bad vacuum = 4.00e-5 Torr.
Monday, May 04, 2015, 11:17
IGP1 = 2e-7 Torr.
TGHT = 274A, 4.75V
Ramp-up limited to 275A due to max voltage being set at 5.0V
Increased max voltage to 10V
Tapping up manually to 1800C and recording data.
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