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New entries since:Wed Dec 31 16:00:00 1969
ID Date Author Category Type Moduledown Target/Number Subject
  1530   Tuesday, May 09, 2017, 12:45 David WangConditioning StationRepairTM3 TM3 service tray side panel is cleaned and installed back to TM3

TM3 service tray side panel is cleaned and installed back to TM3 this morning. I visually inspected service tray insulators. Nothing is changed comparing to inspection before.Nine screws are installed on  panel to hold it onto TM3.

Attachment 1: TM3_service_tary_side_panel_005.JPG
TM3_service_tary_side_panel_005.JPG
Attachment 2: TM3_service_tary_side_panel_001.JPG
TM3_service_tary_side_panel_001.JPG
Attachment 3: TM3_service_tary_side_panel_004.JPG
TM3_service_tary_side_panel_004.JPG
  1583   Thursday, July 13, 2017, 10:53 Travis CaveConditioning StationStandard OperationTM3no targetModule move

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

  1584   Monday, July 17, 2017, 16:28 Anders MjosConditioning StationDevelopmentTM3No targetConditioning TM3

50 kV stable with less than 1 spark/h during the weekend by RIB obs.

Today 57 kV reached, but observed sparking on the resistors of the new HV cable. The cable will be removed to take out the resistors, before reinstalling it.

The target hall was locked out, but has now been reopened. This was to avoid sparking to the HV cover.

Attachment 1: TM3_HV_conditioning_2017-07-17.docx
  1585   Monday, July 17, 2017, 17:50 Aurelia LaxdalConditioning StationDevelopmentTM3No targetConditioning TM3

Anders Mjos wrote:

50 kV stable with less than 1 spark/h during the weekend by RIB obs.

Today 57 kV reached, but observed sparking on the resistors of the new HV cable. The cable will be removed to take out the resistors, before reinstalling it.

The target hall was locked out, but has now been reopened. This was to avoid sparking to the HV cover.

 EL was brought to 27.5kV.

Attachment 1: 2017-07-17-16_53_03.grab.LWYG0y.png
2017-07-17-16_53_03.grab.LWYG0y.png
  1587   Tuesday, July 18, 2017, 16:53 Anders MjosConditioning StationDevelopmentTM3No targetConditioning TM3

Conditioning continues today with resistors removed from the HV cable

Tuesday, July 18, 2017, 16:53: BIAS / EZL 50 / 25 kV - no sparks

 Tuesday, July 18, 2017, 16:56: BIAS / EZL 55 / 27.5 kV - one spark


TM3 remained at 55 kV over night. Turbo pumps tripped twice and was restarted and HV recovered by RIB ops. Last recovery brought EZL to 16 kV (not 27.5 kV)

About 25 sparks over 15 h. No sparks for the last 3 h

Wednesday, July 19, 2017, 08:12: EZL to 27.5 kV

Wednesday, July 19, 2017, 08:38: BIAS to 57 kV

Wednesday, July 19, 2017, 08:46: BIAS to 57.5 kV

Wednesday, July 19, 2017, 09:05: BIAS to 59 kV

Wednesday, July 19, 2017, 09:19: BIAS to 60 kV

Wednesday, July 19, 2017, 09:28: EZL to 30 kV

Wednesday, July 19, 2017, 12:25: Heavy sparking. Lowered BIAS to 30 kV

Wednesday, July 19, 2017, 12:37: Increased BIAS again towards 50 kV, but heavy sparking again between 45 and 50 kV. Lowered back to 30 kV

Wednesday, July 19, 2017, 12:40: BIAS at 46 kV

Wednesday, July 19, 2017, 12:42: BIAS at 47 kV

Wednesday, July 19, 2017, 12:44: BIAS at 48 kV

Wednesday, July 19, 2017, 12:48: BIAS at 50 kV

Wednesday, July 19, 2017, 14:50: BIAS at 55 kV after ~2h without sparking at 50 kV

Wednesday, July 19, 2017, 15:12: Sparking. Lowered to 40 kV

Wednesday, July 19, 2017, 16:39: BIAS at 55 kV


Friday, July 21, 2017

Observed top of module inside target hall during HV sparks using crane cameras. No sparks observed, but some faint sound could be heard. Module still sparks at 60 and 55 kV. Have to lower to 40 kV to stop sparking.

Friday, July 21, 2017, 13:25: BIAS / EZL at 50 / 25 kV for without sparking for the last 90 min

  1588   Monday, July 31, 2017, 09:44 Travis CaveConditioning StationStandard OperationTM3no targetModule move

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

  1611   Friday, September 08, 2017, 11:20 Travis CaveConditioning StationStandard OperationTM3no targetModule move

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

  1612   Friday, September 08, 2017, 14:08 David WangConditioning StationRepairTM3 TCS and TM3

TM3 is located at TCS and it is pumping down now. TCS water system has been started.  All TCS water lines for TM3 module internal cooling are bypassed and looped at TCS top ground plate. Water only supply to TCS high  current conductors.

  1613   Wednesday, September 13, 2017, 10:05 David WangConditioning StationRepairTM3 Switch off TCS water system and vacuums

Preparing vent the TCS/TM3. We will remove TM3 service tray cover plate  after venting.

  1614   Wednesday, September 13, 2017, 16:05 David WangConditioning StationRepairTM3 remove Tm3 service tray cover plate

TM3 service tray cover plate has been removed. It is bagged and placed to TH b2 level south wall beside the silo.

  1615   Wednesday, September 13, 2017, 16:13 David WangConditioning StationRepairTM3 TCS turbo pumps are started.

TCS and TM3 all vacuum pumps are started. Everything is fine.

  1616   Friday, September 15, 2017, 14:12 Travis CaveConditioning StationStandard OperationTM3no targetModule move

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

  1680   Wednesday, January 17, 2018, 13:54 David WangConditioning StationStandard OperationTM3 Start TM3 turbo pumps at TCS.

TM3 turbo-pumps are started at TCS. We will keep pumps running until next Wednesday.

  1681   Monday, January 22, 2018, 07:47 David WangConditioning StationStandard OperationTM3 Restarted TM3 vacuum sysytem after site power bump

All TCS and TM3  vacuum pumps are started successfully.

  1783   Friday, September 14, 2018, 09:39 Travis CaveConditioning StationStandard OperationTM3no targetModule move

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

  1792   Tuesday, September 25, 2018, 07:54 David WangConditioning StationRepairTM3 TM3 is connected for HV test at TCS.

water loops are by passed on top. All bias, EE, and  EL are tied together. Started water system.

  1795   Wednesday, September 26, 2018, 07:14 David WangConditioning StationRepairTM3 TM3 HV test at TCS.

I did a HV test on TM3 at TCS yesterday. HV Ramp up speed: 1KV per 5 minutes when below 30KV,1KV per 10 minutes from 30-36KV. There is no major spark below36 KV .  I could see  lots small and big vacuum response on IG1 and PNG2 when conditioning from 30-36 KV, especially when closing to 36 KV.  However, At 36.4 KV, There is a big continuous spark occurred. It could not be stopped until I lowed the HV to 14KV. I have to ramp up from 14 KV again.  This behavior on TM3 HV test is same as before we saw. The module can not pass 36KV at present condition.  During the test., EL is tied to 60KV bias. The HV cover on TM3 top is installed. And, Service tray  cover plate is installed on TM3.

  1796   Thursday, September 27, 2018, 13:58 Travis CaveConditioning StationStandard OperationTM3no targetModule move

 TM#3 has been moved from the conditioning station to the centre east silo. This will be its new home after the silo switcher-roo.

  1894   Monday, March 18, 2019, 07:25 David WangConditioning StationMaintenanceTM3 TCS vacuum pumps have been stopped.

 The TCS will be vented soon for TM2 move.

  1972   Thursday, August 29, 2019, 12:54 Adam NewsomeSouth Hot-CellStandard OperationTM3 TM3 Move

TM3 has been moved from the Middle-East silo to the South Hot Cell.

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