Marla Cervantes wrote:

Marla Cervantes wrote:  Tuesday, June 12, 2018, 18:20 35 circles of 14 mm diameter of cast #4 were packed into a graphite sample container. 30 x UO2/C circles = 4.07 g Graphite container mass = 5.3 g Graphite tube is placed inside a target boat. Boat previously coated with TaC and sintered. Ta-target boat is wrapped with 3 used Ta foils for heat shielding and the boat was installed in Evap1. Chamber currently pumping down. Wednesday, June 13, 2018, 10:29  Initial IGP1 = 6.43e-7 Torr Tapped to 80A at 10A/10s with 20 s waiting period each 10 A Waited 5 min for vacuum to stabilize. Tapped to 90 A at 10A/10s with 20 s waiting period each 10 A Waited 5 min to tap to 100 A  Waited 14 min for vacuum to stabilize Tapped to 400 A at 25A/30s with 30 s waiting period each 25 A Tapped to 520 A at 20A/30s with 30 s waiting period each 20 A Max pressure ~0.06 Torr   Wednesday, June 13, 2018, 11:08 Pressure was dropping indicating full carbothermal reduction but the current tripped off to 0 A.

 Wednesday, June 13, 2018, 12:23

The problem was reported to controls group

After 1 hour at 0 A, the autoramp was set to 4 A/min up to 520 A

The current and voltage are increasing accordingly.

The material will stay 4 hours at max point.

Thursday, June 14, 2018, 09:14 

After 4 hours the auto ramp was set to -1A/min to 0 A

Thursday, June 14, 2018, 14:47 

The IEVAP  was vented with Ar and the UCx was trasnferred to the glove box.