David Wang wrote:

I did a 5KV mega test on TM3.  Only5Mohm @5kV between coli line PQ and chassis(ground). It confirmed the close gap between P,Q and GE. Other lines are ok. See attachment.

See attachment for sparking signs of the water lines mentioned  above (Coil and Ground Electrode lines) in TM3 Source Tray.

TM#3 has been moved back to the north east silo.

Aurelia Laxdal wrote:

David Wang wrote: I did a 5KV mega test on TM3.  Only5Mohm @5kV between coli line PQ and chassis(ground). It confirmed the close gap between P,Q and GE. Other lines are ok. See attachment. See attachment for sparking signs of the water lines mentioned  above (Coil and Ground Electrode lines) in TM3 Source Tray.

PLEASE NOTE: the resistance values for A and B on David's attachment are not correct since these measurements were done after Chad removed the target and the heat-shield bracket was moved, so consequently the water lines were not at their nominal locations. Once they were back in plac,e David took another measurement and the resistance values for A and B showed also 3,000 MOhm (as it was for most of the lines). The only lines that still showed a low resistance were the Coil lines. 

TM#3 has been moved from the north east silo to the conditioning station.

TM#3 is now in the south hot cell.

Last Friday July-15, TM3 was leak checked at TCS. All air to vacuum seals on service cap are good.  Helium pressure test on  TM3 water lines(except GE, HS, and Window) were done. Leak detector has no response at 0.0xE-9 atm.cc/sec. They are leak free.

David Wang wrote:

Last Friday July-15, TM3 was leak checked at TCS. All air to vacuum seals on service cap are good.  Helium pressure test on  TM3 water lines(except GE, HS, and Window) were done. Leak detector has no response at 0.0xE-9 atm.cc/sec. They are leak free.

Friday July 15: did HV tests (with no target installed and with the anode wire removed ). <br>

TM3 went up to 22.5kV. At this voltage it started sparking. The EL was kept at 1/2 with respect to the HV BIAS. <br>

Also HV tests were done while the EL was kept at zero V. In this case, the EL voltage was once in a while spiking  up (up to 4kV). <br>

During sparking we saw responses in the vacuum. Checked the Service Cap (with the HV Cover) in the Target Hall: we couldn't hear/see sparks there.  <br>

The HV was turned off in the same day, after 5:30pm.

I started vacuum system.

I started TCS water system. The chiller does not work properly still. But, It will not affect the TM3 HV conditioning.  HV cover is installed on TM3 in TH. The module is ready for HV conditioning.

 Monday, July 25, 2016, 08:14: Enabled staging for chiller

Monday, July 25, 2016, 08:33: Disabled staging. Fault 2. Staging does not work at this point.

Monday, July 25, 2016, 08:34: Running CP1 manually to cool down water.

Monday, July 25, 2016, 09:15: Bias current limiting at 150 V. Investigating short.

Monday, July 25, 2016, 09:51: EE cable was shorting the BIAS on the TCS side.

Monday, July 25, 2016, 09:57: BIAS/ / EL at 20 / 10 kV

Monday, July 25, 2016, 10:08: Sparking at 24 kV. Lowered to 22 kV

Monday, July 25, 2016, 10:44: BIAS at 25 kV

 Monday, July 25, 2016, 11:00: Sparking at 25.5 kV. Lowered to 25 kV

Monday, July 25, 2016, 12:03: 25.5 kV. No sparking for 10 min. Lower to 20 kV for lunch break.

Monday, July 25, 2016, 12:51: 26 kV

Monday, July 25, 2016, 13:00: Sparking at 27.3 kV. Lowered to 27 kV. EL at 14 kV

Monday, July 25, 2016, 13:04: More sparking. Lowered to 25 kV

Monday, July 25, 2016, 13:39: 25 kV

Monday, July 25, 2016, 14:21: A spark tripped the PS on water resistivity

Monday, July 25, 2016, 14:31: 25 kV

Monday, July 25, 2016, 15:34: ~20 sparks for the last 60 min

Monday, July 25, 2016, 16:28: ~10 sparks for the last 60 min. BIAS an EL off

Monday, July 25, 2016, 16:36: Stopped water cooling system.

Tuesday, July 26, 2016, 08:20: Started water cooling system.

Tuesday, July 26, 2016, 08:24: Ran CP1 manually for 3 min. Enabled staging.

Tuesday, July 26, 2016, 08:31: BIAS / EL at 25 / 0 kV

Tuesday, July 26, 2016, 08:39: EL float to 300 V. Set to 500 V

Tuesday, July 26, 2016, 08:45: BIAS to 25.5 kV

Tuesday, July 26, 2016, 09:07: 26 kV

Tuesday, July 26, 2016, 09:12: Lost contact with EPICS. Scheduled maintenance

Tuesday, July 26, 2016, 10:26: 6 sparks for the last 60 min

Tuesday, July 26, 2016, 10:33: BIAS to 27 kV

Tuesday, July 26, 2016, 10:43: Sparking at 27.8 kV. Lowered to 23 kV

Tuesday, July 26, 2016, 10:51: BIAS back at 27 kV. A spark tripped the BIAS on water resistivity

Tuesday, July 26, 2016, 11:08: BIAS at 27 kV

Tuesday, July 26, 2016, 11:22: BIAS at 28 kV

Tuesday, July 26, 2016, 11:42: BIAS at 27 kV after trip due to water resistivity (spark)

Tuesday, July 26, 2016, 12:00: BIAS / EL off for lunch break

Tuesday, July 26, 2016, 14:10: EL to 10 kV

Tuesday, July 26, 2016, 14:14: El to 20 kV

Tuesday, July 26, 2016, 14:20: EL to 25 kV

Tuesday, July 26, 2016, 14:27: First spark at 27.6 kV

Tuesday, July 26, 2016, 14:29: EL to 28 kV (BIAS at 0 kV)

Tuesday, July 26, 2016, 14:43: RGA on

Tuesday, July 26, 2016, 14:49: No sparking for 20 min

Tuesday, July 26, 2016, 16:02: No sparks for 90 min.

Tuesday, July 26, 2016, 16:06: PS and water off.

Wednesday, July 27, 2016, 09:14: BIAS at 24 kV

Wednesday, July 27, 2016, 09:19: Lowered to 20 kV due to sparking

Wednesday, July 27, 2016, 09:28: BIAS at 22 kV

Wednesday, July 27, 2016, 15:30: BIAS and water off

Thursday, July 28, 2016, 08:43: RGA off

TM#3 with no target has been moved from the conditioning station to the NE silo.

TM#3 has been moved from the north east silo to the conditioning station.

Requested by Aurelia, and approved by Friedhelm, TM3 service tray cover plate ITA2108 has been remove out of the module. The plated is checked for active and contamination after removal. Then,It is double bagged, sealed ,  tagged, and placed downstairs in TH between south wall and green block . The ram contact reading on the plate is about 10 usv/hr.  We will do anther TM3 HV test at TCS without this cover plate.

Water cooling is performed manually with CP1. RGA is ON since yesterday. EE is not connected and in conditioning mode.

Friday, August 12, 2016, 10:43: BIAS at 10 kV, EL at 0.5 kV. IG1 at 1.8E-6 T

 Friday, August 12, 2016, 11:04: BIAS at 20 kV

Friday, August 12, 2016, 11:10: Sparking at 21 kV

Friday, August 12, 2016, 11:29: BIAS at 22 kV. Many small sparks/current excursions.

Friday, August 12, 2016, 11:32 : BIAS at 23 kV

Friday, August 12, 2016, 11:37: BIAS at 24 kV

Friday, August 12, 2016, 11:43: BIAS at 25 kV. Heavy sparking. Lowered to 24 kV to reduce spark rate.

Friday, August 12, 2016, 11:52: Increased sparking rate. Lowered to 23 kV.

Friday, August 12, 2016, 12:05: Lowered to 20 kV

Friday, August 12, 2016, 12:21: Back to 23 kV

Friday, August 12, 2016, 12:28: Heavy sparking between 23 and 24 kV. Lowered to 22 kV

Friday, August 12, 2016, 12:29: More sparking. Lowered to 21 kV.

Friday, August 12, 2016, 13:02: Increased back up to ~25 kV while Aurelia was listening for sparks in the Target Hall.

Friday, August 12, 2016, 13:03: EL to 10 kV

Friday, August 12, 2016, 13:06: BIAS / EL to 23 / 12.5 kV

Friday, August 12, 2016, 13:34: Repeated sparking at 24.5 kV. Ramping down

Friday, August 12, 2016, 15:33: Stopped water package. RGA off

The TCS is venting now. The TM3 blue insulator replacement job will be started soon.

TM#3 is now back in the the north east silo.

TM#3 has been moved from the NE Silo to the conditioning station.

All TM3 blue insulators except Gas,EL, and 60 KV common  on top of the module have been replaced with new designed insulators. The new blue insulator for gas line need to be modified to fit for the bent on the gas  line.   EL, and 60KV common blue insulators were replaced during last time TM3 refurbishment so they are relative new, and  not replaced this time. All seals related to the blue insulators are changed to new seals. The o- r-ing surfaces  for o-ring 221 inside the  new insulators  are rougher than old parts. The module top need to be leak checked.

start of roughing now.

 start of TCS and TM3 turbo-pumps. Everything is good so far.

After blue insulators replacement, TM3 service cap are leak checked. LD base leak rate 0.0xe-9 atm.cc/sec. I sprayed lots helium on all blue insulator seals. No leak has been found. Double checked them again, and got same result. All other seals on top of TM3 also have been checked. They are leak free. OVEN, TUBE, MSP, COIL, and EE water lines are pressurized with 70 psi helium for 3minutes each. They are good also.

Tuesday, September 12, 2016, 10:00: RGA on

Tuesday, September 13, 2016, 13:52: Source on

Tuesday, September 13, 2016, 13:55: BIAS / EL at 10 / 5 kV

Tuesday, September 13, 2016, 13:59: BIAS / EL at 18 / 9 kV

Tuesday, September 13, 2016, 14:06: BIAS / EL at 20 / 10 kV. Minor sparking

Tuesday, September 13, 2016, 14:25: Sparking at about 1 spark/min for the last 10 min

Tuesday, September 13, 2016, 15:38: ~10 sparks for the last 60 min.

Tuesday, September 13, 2016, 15:41: BIAS / EL 22 / 11 kV

Tuesday, September 13, 2016, 15:57: Heavy sparking at 24 kV. Lowered to 21 kV. EL at 12.5 kV

Tuesday, September 13, 2016, 16:00: BIAS / EL at 22 / 12.5 kV

Tuesday, September 13, 2016, 16:05: Trip on resistivity caused by spark

Tuesday, September 13, 2016, 16:07: BIAS / EL at 10 / 5 kV

Tuesday, September 13, 2016, 16:14: BIAS / EL at 20 / 10 kV

Tuesday, September 13, 2016, 16:25: BIAS / EL at 22 / 11 kV

Tuesday, September 13, 2016, 17:00: Sparking at about 1 spark/min for the last 30 min

Tuesday, September 13, 2016, 17:02: Source off.

Wednesday, September 14, 2016, 08:22: BIAS / EL at 20 / 10 kV

Wednesday, September 14, 2016, 08:33: BIAS / EL at 22 / 11 kV

Wednesday, September 14, 2016, 08:35: Trip on resistivity caused by spark

Wednesday, September 14, 2016, 08:38: BIAS / EL at 20 / 10 kV

Wednesday, September 14, 2016, 08:41: BIAS / EL at 21.5 / 11 kV

Wednesday, September 14, 2016, 08:45: BIAS / EL at 22 / 11 kV

Wednesday, September 14, 2016, 09:06: Sparking at about 1 spark/min for the last 20 min

Wednesday, September 14, 2016, 10:17: Sparking rate somewhat reduced. BIAS / EL at 23 / 11 kV

Wednesday, September 14, 2016, 10:23: BIAS / EL at 24 / 12 kV

Wednesday, September 14, 2016, 10:31: BIAS / EL at 25 / 12 kV.

Wednesday, September 14, 2016, 10:32: Trip on resistivity caused by spark

Wednesday, September 14, 2016, 10:36: BIAS / EL at 20 / 10 kV

Wednesday, September 14, 2016, 10:40: BIAS / EL at 23 / 12 kV

Wednesday, September 14, 2016, 10:51: BIAS / EL at 24 / 12 kV

Wednesday, September 14, 2016, 10:57: BIAS / EL at 25 / 12 kV

Wednesday, September 14, 2016, 11:01: Heavy sparking at 25 kV (>15 /min). Trip on resistivity caused by spark

Wednesday, September 14, 2016, 11:10: RGA off.