Tuesday, November 10, 2015, 14:20

Container previously sintered with TaC coating and temperature measurements taken [see elog ID# 256, 257, 258]

3x Ta heat shields

2 packs of 5 SiC discs ~2inches from the end of the right side wrt ionizer tube into page.

Loaded into evap2 and currently pumping down.

see photos attached.

 Monday, November 16, 2015, 11:24

HS water valves opened up this morning, no leaks detected.

Tapped up manually to 35A.

Vacuum stable.

IGP1 = 3.4e-7 Torr.

Initiating auto-ramp at 1.0A/min and 0.5A/min for the TGHT and TBHT respectively.

Final setpoints: 250A for the TGHT and 230A for the TBHT

Monday, November 16, 2015, 13:29

Vacuum too high.

IGP1 = 2.9e-5 Torr.

Decreasing ramping rate down to 0.5A/min and 0.2A/min for the TGHT and TBHT respectively.

 Tuesday, November 17, 2015, 09:12

IGP1 = 1.45e-7 Torr.

TGHT = 250A, 3.28V

TBHT = 230A, 3.33V

OMEGA = 1194C

Tapping up manually to 1900C

 Tuesday, November 17, 2015, 11:22

Tapped up manually to 1800C, realized SiC should only be tapped up to 1700C, backed off immediately down to 415A from 460A/ 1800C.

See attachment for photo of striptool/ time spent above 1700C [~20min].

 Tuesday, November 17, 2015, 15:46

TGHT remained at 1700C for ~4hrs.

TGHT = 420A, 6.44V.

IGP1 = 2.3e-7 Torr.

Initiating cool-down at 2.0A/min and 1.0A/min for the TGHT and TBHT respectively.

See attachment for raw data of temperature measurements.

 Wednesday, November 18, 2015, 13:32

Vented in air and took out this morning.

Looks good, no visual changes with the container.