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Entry  Monday, October 04, 2021, 09:27, Frank Song, ITW, Standard Operation, TM2, C#3, Module Connection IMG_3711.jpgIMG_3712.jpgIMG_3713.jpgIMG_3714.jpg

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

Entry  Tuesday, November 09, 2021, 09:58, Frank Song, ITW, Standard Operation, TM2, C#3, module disconnection IMG_4315.jpg

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

Entry  Wednesday, November 10, 2021, 08:32, Frank Song, ITW, Standard Operation, TM2, UC#36, Module Connection IMG_4323.JPG

 TM2 with target UC#36 was connected at ITW.

Entry  Wednesday, January 05, 2022, 12:45, Frank Song, ITW, Maintenance, TM2, UC#36, TM2 SIS with Target and No external Connections TM2_with_UCx36.jpg

 electrical checked in ITW

Entry  Thursday, January 06, 2022, 10:37, David Wang, ITW, Standard Operation, TM2, , 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.

Entry  Tuesday, January 11, 2022, 11:50, David Wang, ITW, Maintenance, , , 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.  

Entry  Thursday, February 10, 2022, 12:24, David Wang, ITW, Standard 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.

Entry  Thursday, April 28, 2022, 07:24, Frank Song, ITW, Standard Operation, TM2, Febiad Test Target, Module Connection module_connection_checklist20220426.jpg

 TM2 was connected in ITW with a Febiad Test Target. 

Entry  Thursday, April 28, 2022, 08:16, David Wang, ITW, Standard Operation, TM2, , 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. 

Entry  Wednesday, May 25, 2022, 13:43, Frank Song, ITW, Standard Operation, TM2, Febiad-Test, module disconnection tm2_disconnection.jpg

 TM2 with a test target was disconnected in ITW.

Entry  Tuesday, June 21, 2022, 18:30, Frank Song, ITW, Standard Operation, TM2, SiC#43 Febiad, Module Connection TM2_with_sic_42_connected_in_ITW.jpg

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

Entry  Tuesday, July 19, 2022, 11:47, Frank Song, ITW, Standard Operation, TM2, SiC#43 Febiad, TM2 with SiC#43 disconnected in ITW  TM2_with_SiC43_disconnection_in_ITW.jpg

 the module was disconnected in pit and moved to NHC.

Entry  Wednesday, July 27, 2022, 08:11, Frank Song, ITW, Standard Operation, TM2, UCx#38, Module Connection TM2_with_UCx38_connection_at_ITW.jpg

 TM2 with Target UCx#38 was connected in ITW.

Entry  Tuesday, September 06, 2022, 13:58, Frank Song, ITW, Standard Operation, TM2, UCx#38, module disconnection TM2_with_UCx38_disconnection_in_ITW.png

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

Entry  Tuesday, September 13, 2022, 14:10, Frank Song, ITW, Standard Operation, TM2, UCx#39, Module Connection TM2_with_UCx#39_connection_in_ITW.png

 TM2 with UCx#39 is connected in ITW.

Entry  Tuesday, November 01, 2022, 12:37, Frank Song, ITW, Standard Operation, TM2, UCx#39, disconnection TM2_with_UCx39_disconnection_in_ITW.png

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

Entry  Tuesday, November 15, 2022, 13:33, Frank Song, ITW, Standard Operation, TM2, UCx#40, Module Connection TM2_with_UCx#40_connection_in_ITW.png

 TM2 with UCx#40 is connected in ITW.

Entry  Friday, January 06, 2023, 10:38, David Wang, ITW, Standard Operation, TM2, , ITW/TM2 vacuum vessels leak check and TM2 internal cooling lines helium pressure test.  ITW_vacuum_leak_check_2023.pdf

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.

Entry  Monday, January 09, 2023, 14:19, Frank Song, ITW, Standard Operation, TM2, UCx#40, TM2 with UCx40 disconnection in ITW TM2_with_UCx40_disconnection_in_ITW.png

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

Entry  Tuesday, January 24, 2023, 07:21, David Wang, ITW, Maintenance, , , 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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