Monday, March 09, 2015, 16:47
Target consists of 400 discs.
Total packed length 3.4cm
Total mass 45.8181g
Re foil inserted.
Chamber is currently being pumped down.
No Ta-heat shield wrapped.
One end-cap inserted on left (wrt ionizer into the page)
TGHT and TBHT will be ramped up to 820A/230A respectively at 2.0A/min.
Tuesday, March 10, 2015, 10:28
HS water valves opened, no leaks detected.
IGP1 = 4.5e-7 Torr.
Power supply not responding to epics...AGAIN. grrrr
Tuesday, March 10, 2015, 13:17
IOC was rebooted - back up and running again! yay!
IGP1 = 4.0e-7 Torr.
Tapped up manually to 35A, waited ~30min, vaccuum stable.
Initiating auto-ramp.
Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.
Wednesday, March 11, 2015, 09:11
Target has been at max setpoints for ~14hrs.
OMEGA = 1472C
TGHT = 820A, 12.85V
TBHT = 230A, 3.696V
IGP1 = 5.5ee-7 Torr
Manually tapping up to obtain hotter internal temperature...
Wednesday, March 11, 2015, 11:33
Current conditions:
OMEGA = 1565C
TGHT = 900A, 14.3V
TBHT = 230A, 3.7V
IGP1 = 6.3e-7 Torr
Digital pyrometer readings:
Hottest point on left leg, WRT ionizer tube into page = 2400C
Internal temp of container = 1580C
Sat at this temperature ~45min.
Initiating auto-cool at TGHT 2.0A/min, TBHT 1.0A/min
[See attached photo for collected data]
Thursday, March 12, 2015, 13:12
vented and opened up this morning.
only reached a max internal temp of 1580C.
therefore added 3xTa heat shield and will re-condition at a higher temp.
currently pumping back down.
Thursday, March 12, 2015, 14:34
IGP1 = 7.0e-7 Torr
stepped up to 35A, waited ~30min, vacuum stable.
IGP1 = 6.1e-7 Torr
Initating ramp-up...
Friday, March 13, 2015, 07:47
IGP1 = 2.9e-7 Torr
reached max set points for TGHT = 600A, TBHT = 230A
Initiating manual tap-up.
Friday, March 13, 2015, 10:31
Reached 720A, 1800C at 0850
Will continue to heat for ~3hrs
[see attachment for collected data]
Friday, March 13, 2015, 12:00
Sat at max temperature, 1800C, for 3 hours.
Initiating auto-cool at 2.0A/min for TGHT and 1.0A/min for TBHT.
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