Wednesday, September 11, 2019, 15:12

A target container coated with TaC elog 455 was loaded with an empty graphite cartridge and set it in the EVAP2

The system is currently pumping down.

The target container was wrapped with 3 new Ta heat shields.

The target container will be heated to 2000 C and the temperature will be held for 4 hours.

 The autoramp was set to:

TGHT 1 A/min, 450 A

TBHT 0.5 A/min, to 230 A

At 500 A on the TGHT, 20 additional amps were programmed to increased at 1 A/min, however, the autoramp increased the current to 520 A without stepping (see figure A). 

The final conditions were:

TGHT: 9.95 V, 565.59 A

TBHT: 4.18 V, 233.43 A

IGP1: 2.2 e-6 Torr

Friday, September 13, 2019, 11:16

After 4 hours the EVAP2 was cooled down

at a rate of TGHT 1 A/min and TBHT 0.5 A/min

The EVAP2 was vented with air.