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  RH-ISAC, Page 74 of 138  Not logged in ELOG logo
ID Date Author Categorydown Type Module Target/Number Subject
  2252   Monday, October 04, 2021, 09:27 Frank SongITWStandard OperationTM2C#3Module Connection

 TM2 been connected with new target C#3 in ITW. 

Attachment 1: IMG_3711.jpg
IMG_3711.jpg
Attachment 2: IMG_3712.jpg
IMG_3712.jpg
Attachment 3: IMG_3713.jpg
IMG_3713.jpg
Attachment 4: IMG_3714.jpg
IMG_3714.jpg
  2262   Tuesday, November 09, 2021, 09:58 Frank SongITWStandard OperationTM2C#3module disconnection

 the module TM2 with target C#3 was disconnected at ITW and is being remoted moving to SHC.

Attachment 1: IMG_4315.jpg
IMG_4315.jpg
  2265   Wednesday, November 10, 2021, 08:32 Frank SongITWStandard OperationTM2UC#36Module Connection

 TM2 with target UC#36 was connected at ITW.

Attachment 1: IMG_4323.JPG
IMG_4323.JPG
  2283   Wednesday, January 05, 2022, 12:45 Frank SongITWMaintenanceTM2UC#36TM2 SIS with Target and No external Connections

 electrical checked in ITW

Attachment 1: TM2_with_UCx36.jpg
TM2_with_UCx36.jpg
  2284   Thursday, January 06, 2022, 10:37 David WangITWStandard OperationTM2 ITW vacuum vessel and TM2 internal cooling lines leak check in pit.

Frank and I finished ITW and TM2 leak check. TM2 internal water-cooling lines are leak free. They passed 70 psi helium pressure test. We found some small leaks on ITW primary and secondary vacuum vessel. I list them here:

  1. Exit module 2 service cap top plate to cap body O-ring at SW corner. Leak rate 2XE-8 atm.cc/sec. It is an old leak we found before. Solution: I sprayed high vacuum resin to leak area. It is improved to 3Xe-9atm/sec now. We can leave it there.
  1. Exit module 1 module to tank flange o-ring at target module side and north side. Leak rate 3XE-8atm.cc/sec. Solution: replace the o-ring. It involves in disconnect exit module 1 and remove it out. We may or may not change it. Let's check the schedule and discuss it later. We need Travis help on module moving out.
  2. Exit module 1 north side sqaure service panel o-ring. Leak rate 2XE-7 atm.cc/sec.  Solution: replace the o-ring. It is a straight forward job.  It will be done this shut down.
  3. Exit module 1 north side round roughing valve panel o-ring. Leak rate 8XE-9 atm.cc/sec. Solution: Replace the o-ring. It involves in disconnecting and removing ITW RV4.  It could be done this shut down.
  4. Big T tank o-ring seal underneath the flange at exit 1 module north side . Leak rate 3XE-8 atm.cc/sec. Solution: None. All modules and module base flange have to been moved out to replace this big o-ring.  It is a huge project to change this o-ring .  I checked this big o-ring seal every year. It is first time a small leak is found.  Maybe, we could try high vacuum resin spray first.
  5. Dump module flange o-ring at the side by Target module. Leak rate 8XE-9 atm.cc/sec. It cannot be confirmed since the TM o-ring is just beside it. Mostly, the leak is on dump module side. We changed TM flange o-ring every year. But we never changed dump module flange o-ring in history. Many copper cooling lines above the dump module has to be removed to remove the dump module out. I do not think we have time to do it this year. Also,  the leak rate is pretty small. Maybe, we can schedule it next year.

  Most these small leaks are close to turbopumps. This could be the reason the ITW vacuum on gauges are still pretty good.

  2288   Tuesday, January 11, 2022, 11:50 David WangITWMaintenance   ITW Exit module 1 side sqaure panel O-ing seal replacement.

Frank and I replaced ITW Exit module 1 side square service panel o-ring seal. Also, The target module pit top flange o-ring seal in ITW pit is replaced.  

  2303   Thursday, February 10, 2022, 12:24 David WangITWStandard Operation  ITW HV test without mdoule.

  Carla did the test. and reported the result as following: HV testing of ITW is complete. It was pretty well behaved up to 59.5kV, and sat at 59kV for 30mins with no sparks (that EPICS caught). There was some strange behaviour of the current between 51kV and 53kV - it was jumping by 20uA or more - but there didn't seem to be any voltage response, and it went away after 53kV (though it returned on the way back down). The test was done in Feb 02.

  2316   Thursday, April 28, 2022, 07:24 Frank SongITWStandard OperationTM2Febiad Test TargetModule Connection

 TM2 was connected in ITW with a Febiad Test Target. 

Attachment 1: module_connection_checklist20220426.jpg
module_connection_checklist20220426.jpg
  2317   Thursday, April 28, 2022, 08:16 David WangITWStandard OperationTM2  Annual ITW water signal interlocks check .

Annual ITW water signal interlocks check was done with TM2 in ITW.   Water signal interlocks on all water circuits related to TM and 2A beam lines in ITW work fine. 

  2326   Wednesday, May 25, 2022, 13:43 Frank SongITWStandard OperationTM2Febiad-Testmodule disconnection

 TM2 with a test target was disconnected in ITW.

Attachment 1: tm2_disconnection.jpg
tm2_disconnection.jpg
  2334   Tuesday, June 21, 2022, 18:30 Frank SongITWStandard OperationTM2SiC#43 FebiadModule Connection

 TM2 with Febiad Target SiC #43 was connected in ITW. NOTE: the number of TARGET in attached picture should be #43. 

Attachment 1: TM2_with_sic_42_connected_in_ITW.jpg
TM2_with_sic_42_connected_in_ITW.jpg
  2346   Tuesday, July 19, 2022, 11:47 Frank SongITWStandard OperationTM2SiC#43 FebiadTM2 with SiC#43 disconnected in ITW

 the module was disconnected in pit and moved to NHC.

Attachment 1: TM2_with_SiC43_disconnection_in_ITW.jpg
TM2_with_SiC43_disconnection_in_ITW.jpg
  2350   Wednesday, July 27, 2022, 08:11 Frank SongITWStandard OperationTM2UCx#38Module Connection

 TM2 with Target UCx#38 was connected in ITW.

Attachment 1: TM2_with_UCx38_connection_at_ITW.jpg
TM2_with_UCx38_connection_at_ITW.jpg
  2361   Tuesday, September 06, 2022, 13:58 Frank SongITWStandard OperationTM2UCx#38module disconnection

 TM2 with Target UCx38 was disconnected in ITW and moved to NHC

Attachment 1: TM2_with_UCx38_disconnection_in_ITW.png
TM2_with_UCx38_disconnection_in_ITW.png
  2365   Tuesday, September 13, 2022, 14:10 Frank SongITWStandard OperationTM2UCx#39Module Connection

 TM2 with UCx#39 is connected in ITW.

Attachment 1: TM2_with_UCx#39_connection_in_ITW.png
TM2_with_UCx#39_connection_in_ITW.png
  2381   Tuesday, November 01, 2022, 12:37 Frank SongITWStandard OperationTM2UCx#39disconnection

 TM2 with spent target UCx#39 was disconnected in ITW then moved to NHC.

Attachment 1: TM2_with_UCx39_disconnection_in_ITW.png
TM2_with_UCx39_disconnection_in_ITW.png
  2387   Tuesday, November 15, 2022, 13:33 Frank SongITWStandard OperationTM2UCx#40Module Connection

 TM2 with UCx#40 is connected in ITW.

Attachment 1: TM2_with_UCx#40_connection_in_ITW.png
TM2_with_UCx#40_connection_in_ITW.png
  2401   Friday, January 06, 2023, 10:38 David WangITWStandard OperationTM2 ITW/TM2 vacuum vessels leak check and TM2 internal cooling lines helium pressure test.

ITW and TM2 primary and secondary vacuum vessel leak check is done. Leak detector is connected to ITW TP1. Base leak rate on leak detector is 0.0 x E-9 atm.cc/sec.   See attachment for the result.  No big issue. Two old leaks we found last year at location D and E disappeared in this check. We did Vacseal resin spray on them last year.  It looks like the Vacseal spray works .  From the result , I can see the o-ring between exit 1 module and T - flange is closing to the end of the life.  There are two small leaks on this o-ring now at A and B location. We plan to change this o-ring next winter shut down. We do vacseal spray on them this year. The big O-ring between tank vessel and T -flange looks still ok. Two small leaks are found on location F and G on this O-ring. Not much we can do on them. The leak on location C and B were sprayed with resin yesterday after leak check. They are leak free after spray on check. I will double check them. Leak on location A will be resin sprayed after TM2 is removed and ITW is under vacuum.   All TM2 internal water-cooling lines are helium pressurized (70 psi) for 5 minutes each. HS shows 2.5 X E-9atm.cc/sec leak rate. The rest lines are 0.0 X E-9 atm.cc/sec.

Attachment 1: ITW_vacuum_leak_check_2023.pdf
ITW_vacuum_leak_check_2023.pdf
  2402   Monday, January 09, 2023, 14:19 Frank SongITWStandard OperationTM2UCx#40TM2 with UCx40 disconnection in ITW

 TM2 with target UCx40 was disconnected in ITW and moved to NHC.

Attachment 1: TM2_with_UCx40_disconnection_in_ITW.png
TM2_with_UCx40_disconnection_in_ITW.png
  2406   Tuesday, January 24, 2023, 07:21 David WangITWMaintenance  ITW pit general clean up.

 ITW  was cleaned with vacuum canister in Jan 10th. HV  cage inside and blue nylon insulators were wiped.  Garbage inside the pits were cleaned out.

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