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New entries since:Wed Dec 31 16:00:00 1969
ID Date Author Category Type Module Target/Number Subject
  368   Monday, May 27, 2013, 16:36 Bevan MossConditioning StationStandard OperationTM4Ta#40Argon Venting Started

 Argon venting has started. It will be left to vent over night. 

  367   Monday, May 27, 2013, 16:07 Bevan MossConditioning StationStandard OperationTM4Ta #40HV conditioning

 The HV conditioning reached a maximum of 44kV today before a spark took out the canbus card. I will attach the data once I have had a chance to format it. 

  366   Monday, May 27, 2013, 16:01 Bevan MossConditioning StationRepair  CanBUS card

 During HV conditioning of TM4 with Ta#40 there was a spark at ~43 kV that caused the Bias card to "fry". Dave Morris has been contacted and has said he will replace it tomorrow.

  365   Monday, May 27, 2013, 15:59 Bevan MossConditioning StationRepair  Compressor fault

 Once again the 7.5 compressors are tripping due to faults. I believe it is due to over pressure as a result of the chiller fans not coming on. I have contacted ESC.

  364   Monday, May 27, 2013, 11:55 chad fisherSouth Hot-CellStandard Operation  Special Tooling for RFQ target

The special tool made for the RFQ target autopsy has been inserted into the hot cell.

 

4-40 button head screws have been successfully lossened.

  363   Monday, May 27, 2013, 10:37 Bevan MossConditioning StationMaintenanceTM4 Cooling Systems topped off

Rob walker has flushed and refilled the primary side of the system (note the water still looks nasty). This morning the primary side of system needed to be bled as there were air pockets. Also TK2 had reached its low point and needed to be topped up.

  362   Monday, May 27, 2013, 10:35 Bevan MossConditioning StationStandard OperationTM4Ta #40Pumps Started HV testing to follow

The pumps have been turned on at ~9:30 this morning. Current values are 6.61 Mohm TCS:DIC1 @19.4 C. HV testing will start momentarily.

  361   Thursday, May 23, 2013, 14:12 Bevan MossConditioning StationMaintenance  Primary Circuit Drained and Flushed

 Rob Walker has drained the primary side of the conditioning station. It will be flushed, filled  and chemically treated. It was desired to chemically treat the primary side before before but it took so long that sediment was found (things started to grow).

  360   Thursday, May 23, 2013, 14:08 Bevan MossConditioning StationStandard OperationTM4Ta #40Turbo Pumps on

 The turbo pumps have been turned on and are running

  359   Thursday, May 23, 2013, 14:07 Bevan MossConditioning StationRepair  Chiller Unit Repaired

 ESC came today and "repaired" the chiller. There was something wrong with the VFD controller. The were able to get it to start and run correctly again but were not able to recreate the problem. At this point it appears that it has magically disappeared. 

  358   Thursday, May 23, 2013, 11:14 David WangSouth Hot-CellStandard OperationTM4TA#40 TM4 TA# 40 HS leak check at SHC

TM4 Ta#40 HS leak check is done at SHC . No leak has been found so far. There will be  a helium pressure test on it at CS.

  357   Thursday, May 23, 2013, 09:51 Travis CaveConditioning StationStandard OperationTM4Ta#40module move

TM#4 with Ta#40 has been moved from the south hot cell to the conditioning station.

  356   Wednesday, May 22, 2013, 14:11 chad fisherSouth Hot-CellStandard OperationTM4Ta#40Ta#40 installed

Ta#40 has been installed.

Leak checking and high voltage tomorrow before the move.

  355   Wednesday, May 22, 2013, 10:41 Travis CaveSouth Hot-CellStandard OperationTM4SiC#28 (RFQ Target)module move

TM#4 with SiC#28 has been moved from the south west silo to the south hot cell.

  354   Tuesday, May 21, 2013, 11:52 Bevan MossConditioning StationStandard OperationTM3No Source TrayMay 16th Long HV conditioning

On May 16th 2013 the module was HV conditioned all day. As a result the maximum stable voltage has been increased to about 47kV (~4kV more than last test). A maximum voltage of 49kV was achieved but the module was very unstable. Attached is the data from the testing. Note that occasionally the sparking caused the PS to reset, it was turned back on and the voltage increased back to what it was (or lower) quickly.

  353   Tuesday, May 21, 2013, 11:38 Travis CaveITEStandard OperationTM4SiC#28 (RFQ Target)module move

TM#3 with SiC#28 (RFQ Target) has been moved from the east target station to the south west silo.

  352   Friday, May 17, 2013, 12:02 Travis CaveConditioning StationStandard OperationTM3 module move

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

  351   Friday, May 17, 2013, 10:04 chad fisherSouth Hot-CellRepair  Manipulator Repair

Manipulator has been sucessfully repaired. Recieved 0.19 mSv. Took Approx. 10-20 minutes

  350   Wednesday, May 15, 2013, 18:12 Bevan MossConditioning StationStandard OperationTM3No source trayHV test repeat

 After discussion with Friedhelm it was decided to continue trying to condition the module today before moving it tomorrow. The voltage was quickly raised until 40 kV where it was left for ~30 minutes. Sparking was minimal. It was then slowly raised to 44.3 kV it held this voltage for ~8 minutes when the current started to climb (remained below 200uA as set as a limit in previous tesing). There was also sparking at this point. This continued for ~2.5 minutes until once again the water resistivity sensor tripped again. It appears that there is a~ 44kV limit on TM3. Attached is the data. I will present all of the data to the group tomorrow showing the results of multiple testing.

 

 

  349   Wednesday, May 15, 2013, 17:32 Bevan MossConditioning StationStandard OperationTM3 TM3 in place but not connected

 To confirm that the sparking was coming from the module rather than the conditioning station TM3 was grounded and the conditioning station biased. Attached are the results. Highlights include that there was no sparking and the station was able to achieve 60kV (limited by controls from going higher). The current from the raw file has been corrected by the required factor of 5.

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