Thursday, July 05, 2018, 13:24

Target container was previously coated and sintered with TaC, also wrapped with Ta heat shields (see Evap2 elog# 410).

Loaded 201 discs of UCx with 7.27 cm in length + 5 extra discs for QC samples. 

One end-cap (coated/sintered TaC) inserted right, wrt the ionizer tube pointing down.

Left side is OPEN; a spring is inserted to hold the discs in place.

Chamber is currently being pumped down. 

TGHT will be ramped up to 495A/8.85V and TBHT to 230A/3.26V (same parameters used for sintering the container, evap2 elog#410).

Vacuum initial setting:

Good Vac = 5.0 e-5 Torr, Bad vac = 8.0 e-5 Torr.

pressure level will be monitored accordingly...

Auto-ramping setting

TGHT: 60 wait time, 0.2A/min, final 495A

TGHT: 60 wait time, 0.2A/min, final 230A.

 Thursday, July 05, 2018, 16:50

Tapping up TGHT to 40 A/0.49 V and TGHT to 40A/0.64V.

Vac slowly increasing from 5.0 e-6 Torr. 

Initiate auto-heating

 Tuesday, July 10, 2018, 10:46

Holding TGHT at 495A/5.3V for over 25 hours.  Pressure at 2.9e-6 Torr.

Initiate autocooling TGHT at 2A/min, TBHT 1.0A/min

 Wednesday, July 11, 2018, 17:12

Target was removed from the Evap; it is now in the Ar glovebox.  End cap is inserted. 

Target is ready for installation.