Thursday, March 07, 2019, 07:48: IV4 reset, BV6 & TMS TP6 reset.

Turbo pump restarted.

Auto cooling @ 2A per min.

Thursday, March 07, 2019, 08:40: Speed up Auto-cooling to 4A per min.

Thursday, March 07, 2019, 11:06: Power cycled the control boxes for the turbo pumps one by one. Operation in back to normal.

Thursday, March 07, 2019, 11:09: Switched to filament 2 on IG6. Reset.

Sparks from BIAS to EZL noticed at 1 kV. A wire was moved away from insulator 'O'

Sparks from BIAS to EZL @ 3kV

Friday, March 08, 2019, 11:00: Power supplies checked with John Chow.

BIAS (V) ------------------- EZL (V)

Set@-Read-Actual-----Set@-Read-Actual

1000- 982- 816---------1000- 987- 996

1500-1480-1300-------1500-1475-1530

2000-1993-1600-------2000-1993-1997

2500-2491-2070-------10000-9993-9964

3000-2989-2500

3500-3487-2900

4000-3985-3360

5000-4982-4145

Note* Lower reading on BIAS. Check the scaling with controls group.

Friday, March 08, 2019, 11:14: RGA, Ion gauge, Turbo pumps off.

Friday, March 08, 2019, 13:01: Venting for visual inspection.

Visual & Multimeter checks appear ok.

Friday, March 08, 2019, 14:37: Roughing.

Friday, March 08, 2019, 15:00: Turbos on.

Monday, March 11, 2019, 09:00: Switch everything on & slowly increase EZL & BIAS together

Monday, March 11, 2019, 09:30: Spark at approx 12-13 kV on BIAS. TGHT to 600A? Readback.

TGHT PS readback issues. John C contacted.

Power down.

Prep for TGHT PS removal. Possible capacitive effect? Test TS w/o TGHT PS after.

Monday, March 11, 2019, 13:55: New TGHT PS installed.

Tuesday, March 12, 2019, 08:37: Power / sources on

Tuesday, March 12, 2019, 08:50: BIAS to over 3kV. EZL set to 1 kV, but charged to over 5.5 kV on its own.

Tuesday, March 12, 2019, 09:30: Electrical check in the HV cage revealed a light oxide coating on the EZL post 'O'. This appears to have insulated the nut & feed through. Will require venting & removal to clean.

Ion gauge, turbo pumps off.

Tuesday, March 12, 2019, 11:10: Venting.

Wednesday, March 13, 2019, 08:30: Roughing. The brass nut & spark cap were polished, cleaned and re-installed. Other connections & wires cleaned.

Wednesday, March 13, 2019, 09:10: Turbo pumps started. Wiring up top re-connected.

Update* EZL PS removed. Tested by John C & Tomislav. The HV enable circuit wouldn't activate. Upon further investigating into the control and voltage regulating circuits of the PS, they found that the control ICs are 40% under powered, only getting 10V instead of 15V from its voltage regulator.

EZL PS to be replaced.

Wednesday, March 20, 2019, 07:03: Turbo pumps off

Wednesday, March 20, 2019, 08:28: Venting