Wednesday, September 27, 2017, 09:25
UO2/C green was prepared Sept 20th, 2017.
The cast peeled off the glass Sept 22nd, 2017 - not quite enough 'special' ingredient.
UO2 stuck to glass around edges of cast - a lot of flakes produced while peeling off.
Initial UO2 powder used = 50.00g (Inventory R-01032A, UO2 + bottle = 726.38g before use)
Graphite powder used = 10.03g
Green cast dried UO2/C + organic mass = 60.38g
The green was rolled up and wrapped in a piece of graphite sheet.
The Ta-target boat was wrapped with 3-layers of heat shield [reused from last 1stepUCx] and installed in evap1 yesterday afternoon.
Chamber pumped down overnight.
Target boat will be ramped up to 520A.
Vacuum limit stop at 5.0e-5 Torr, backing off at 6.0e-5 Torr.
IG1 = 3.5e-6 Torr
Tapped up to 30A, 0.43V
Waited ~50min, vacuum stable.
IGP1 = 8.6e-6 Torr
Initiating auto-ramp at 0.1A/min
Wednesday, September 27, 2017, 13:28
IGP1 = 1.4e-5 Torr
TGHT = 38.5A, 0.48V
Vacuum stable.
Changing vacuum limits and ramping rate.
Vacuum limit stop at 2.0e-4 Torr, backing off at 5.0e-4 Torr.
Increasing ramping rate to 0.2A/min.
Thursday, September 28, 2017, 08:41
IGP1 = 3.26e-5 Torr
TGHT = 174A, 1.71V
Vacuum stable.
Increasing ramping rate to 0.5A/min.
Thursday, September 28, 2017, 09:56
IGP1 = 4.85e-5 Torr
TGHT = 195A, 1.92V
Vacuum initially climbed a small amount with last increase, has started to decrease - vacuum stable.
Increasing ramping rate to 1.0A/min.
Thursday, September 28, 2017, 10:30
IGP1 = 5.3e-5 Torr
TGHT = 220A, 2.18V
Vacuum increased slightly again with faster ramping rate.
Vacuum now dropping - stable.
Increasing ramping rate to 2.0A/min.
Thursday, September 28, 2017, 11:07
IGP1 = 6.35e-5 Torr
TGHT = 302A, 3.09V
Vacuum increased slightly again with faster ramping rate.
Vacuum now dropping - stable.
Increasing ramping rate to 2.5A/min.
Thursday, September 28, 2017, 11:45
IGP1 = 1.67e-4 Torr
TGHT = 380A, 4.04V
Vacuum increased normally at slow rate for first half hour.
~30min into the 2.5A/min rate increase, vacuum started to climb much faster.
Paused auto-ramp for few min to allow vacuum to stabilize.
Vacuum decreasing - stable.
IGP1 = 1.4e-4 Torr
Decreasing ramping rate to 0.5A/min for next hour while unable to watch.
Thursday, September 28, 2017, 13:20
IGP1 = 1.93e-4 Torr
TGHT = 425A, 4.58V
Vacuum stable.
Changing vacuum limits and ramping rate.
Increasing ramping rate 1.0A/min.
Vacuum limit stop at 3.0e-4 Torr, backing off at 6.0e-4 Torr.
Thursday, September 28, 2017, 14:06
IGP1 = 3.1e-4 Torr
TGHT = 456A, 4.93V
Vacuum stable.
Changing vacuum limits and ramping rate.
Changing ramping rate to 0.5A/ 30sec.
Vacuum limit stop at 4.0e-4 Torr, backing off at 7.0e-4 Torr.
Thursday, September 28, 2017, 14:44
IGP1 = 4.0e-4 Torr
TGHT = 468A, 5.07V
Vacuum stable.
Changing vacuum limits.
Vacuum limit stop at 5.0e-4 Torr, backing off at 8.0e-4 Torr.
Thursday, September 28, 2017, 15:49
TP thermocouple = 28.1C
IGP1 = 5.0e-4 Torr
TGHT = 485A, 5.25V
Vacuum stable.
Changing ramping rate for overnight heating.
Decreasing ramping rate to 0.5A/min.
Friday, September 29, 2017, 09:11
TP thermocouple = 26.1C
IGP1 = 5.0e-6 Torr
TGHT = 520A, 5.60V
Vacuum stable.
Carbonization process complete!
Evap1 has remained at max setpoints for ~13hrs
Initiating auto-cool at 1.0A/min
Tuesday, October 03, 2017, 10:09
Vented in Ar and transferred from evap1 to glove box yesterday.
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