Monday, November 04, 2019, 14:19
Each endcap is separated with a disc of graphite foil and rolled into packs one pack of 4 and one pack of 8 within a foil envelope in a target boat.
There are also 3 coated springs interspersed.
The boat is wrapped with 3-layers of Ta heatshields.
Chamber pumped down overnight.
OMEGA slope = 0.99
Will Tap TGHT up to 40 A then autoramp to 400A at 1A/min.
Final desired temperature on OMEGA (tap)= 1800C
Tuesday, November 05, 2019, 11:30
IGP1 = 9.6e-7 Torr
Autoramp TGHT to 40A at 1A/min
Tuesday, November 05, 2019, 11:44
IGP1= 2.6e-06 Torr
TGHT = 40.8 A, 0.37V
Will leave at 40 A for 1 hour
Tuesday, November 05, 2019, 12:39
IGP1=2.5e-6 Torr
TGHT =40.0A, .33V
Start ramping TGHT to 400A at 0.1A/min
Wednesday, November 06, 2019, 09:32
IGP1=7.8e-7 Torr
TGHT = 168.4A, 2.38V
increase ramp speed to 1A/min
Wednesday, November 06, 2019, 14:07
IGP1= 2.34e-6 Torr
TGHT=400.0 A, 6.98V
set TGHT autoramp to 460A @ 1A/min aiming for 1850C (see attached plot)
Wednesday, November 06, 2019, 15:18
OMEGA = 1776 C
TGHT = 460.0A, 8.52V
IGP1= 4.7e-6 Torr
Starting manual tap up to 1810C
Wednesday, November 06, 2019, 15:36
OMEGA=1810 C
TGHT = 468.8A, 8.74V
IGP1=4.14e-6
Wednesday, November 06, 2019, 19:04
OMEGA=1822 C (has been between 1817-1824 C over 3.5 hours )
TGHT=468.8A, 8.67V
IGP1=1.9498e-06 Torr
Start TGHT ramp down at -2A/min
Thursday, November 07, 2019, 09:55
THGT = 0A, 0V overnight
IGP1= 3.2 e-07 Torr
Proceeding with unloading.
End caps looked good for online use.
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