Wednesday, February 28, 2018, 15:16

Container coated with TaC using 'flushing technique' and let dry.

Q-tip to plug ionizer became stuck in ionizer, removed manually with small drill bit.

Inspected ionizer with microscope, ionizer still good.

Cleaned ionizer tube with acetone.

Wrapped with 3 x Ta heat shields, incl center block

Currently pumping down in evap2

OMEGA slope = 0.98

Good vac at 3.0e-5, bad vac at 8.0e-5 Torr.

 Thursday, March 01, 2018, 10:06

HW water valves opened yesterday, no leaks detected.

IGP1 = 2.8e-7 Torr

Tapped up manually to 40A.

Waited ~3hrs

Vacuum stable.

IGP1 = 5.3e-7 Torr

IGP2 = 5.4e-7 Torr

Initiating auto ramp for TGHT @ 1.0A/min to a max setpoint of 350A

Initiating auto ramp for TBHT @ 0.5A/min to a max setpoint of 230A

Once max setpoints achieved, will tap up manually to final desired temperature of 1900C

 Thursday, March 01, 2018, 14:39

Vacuum started to climb very fast - auto-ramp was stopped.

Vacuum climbed up to IGP1 = 1.3e-4 Torr

Tapped TGHT back down to 80A from 90A, TBHT down to 50A from 60A.

Waited ~40min.

Vacuum stable, IGP1 = 2.6e-6 Torr

Restarting auto-ramp.

 Thursday, March 01, 2018, 14:54

IGP1 = 2.1e-5 Torr

Vacuum climbing quite rapidly again, stopped auto-ramp and vacuum started to drop right away.

TGHT = 100A

TBHT = 56A

Waited ~10min

IGP1 = 6.0e-6 Torr

IGP2 = 5.2e-6 Torr

Decreasing ramping rate to 0.5A/min and 0.2A/min for the TGHT and TBHT respectively, and re-initiating auto-ramp.

 Friday, March 02, 2018, 10:18

TGHT = 350A, 5.61V

TBHT = 230A, 4.04V

IGP1 = 4.3e-7 Torr

IGP2 = 3.8e-7 Torr

OMEGA = 1624C

Vacuum stable.

Increasing max setpoint of TGHT to 400A

Re-initiating auto-ramp of TGHT.

 Friday, March 02, 2018, 11:04

TGHT = 372A, 6.05V

IGP1 = 5.0e-7 Torr

Increasing ramping rate for TGHT to 1.0A/min

 Friday, March 02, 2018, 11:44

TGHT = 400A, 6.60V

IGP1 = 6.9e-7 Torr

OMEGA = 1780C

Vacuum stable.

Increasing max setpoint of TGHT to 430A

Re-initiating auto-ramp of TGHT.

 Friday, March 02, 2018, 12:17

TGHT = 430A, 7.22V

OMEGA = 1866C

IGP1 = 9.5e-7 Torr

Tapped up manually to OMEGA = 1910C

TGHT = 445A, 7.57V

TBHT = 230A, 4.07V

IGP1 = 1.1e-6 Torr

IGP2 = 9.9e-7 Torr

 Monday, March 05, 2018, 08:41

Remained at max setpoints over the weekend.

TGHT = 445A, 7.47V

TBHT = 230A, 4.06V

IGP1 = 1.87e-7 Torr

IGP2 = 1.47e-7 Torr

OMEGA = 1894C

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

 Tuesday, March 20, 2018, 14:53

Vented in air.

Container was transferred to glove box for loading ~1 week ago

Container looks good.