TM#2 with Graphite #1 has been moved back to the west target station from the conditioning station.

Tm2 and itw entrance module have been disconnected in ITW. I will attach disconnection checklist later.

Entrance Module was moved from South Hot Cell to ITW Station.

Note: weight of entrance module, as shown via overhead crane's load cell, is 14,900 lbs.

 The West Entrance module has been moved to the south hot cell for repairs.

 Both the west entrance module and TM#2 with Ta#60 have been moved back into ITW.

 TM#2 with Ta#60 is now in the south hot cell.

 TM#2 with C#2 has been moved from the south hot cell to the West Target Station.

TM2 has been moved from the Conditioning Station to ITW. 

TM2 has been connected to ITW. Turbo pumps are stared. ITW pumping down is fine so far.

ITW primary and secondary vacuum vessel leak check are done. There is a 5XE-8 atm.cc/sec leak on Exit service cap NW side square panel.  The leak is small. And, it is close to ITW TP3 so it is not affect ion beam line vacuum during operation. We will replace the seal on the panel later.   The rest leak check on air to vacuum seals are good. TM2 water lines are pressurized with 70 psi helium. We did it  3 hours after water lines are purged. No leak was showed during the check.

2021-02-24th: The o-ring on exit 1 NW side square panel is replaced by David Wang and Frank Song. 

Ramp up ITW bias to 57KV. no spark. 200uA leaking current at 57KV. The test is done without target module in station.   ITW water circuits are looped in pit.  EE , EL are switched off during the test. 

ITW water flow wheels and coils are replaced. Wheels and coils on Oven, Tube, HS, EE, MSP, Febiad coil, containment box window, dump,dump plug, 2A window, and tank return circuits are replaced with new parts.

TM2 has been connected it ITW.  All turbo pumps are started.

The West Entrance Module has been moved from the South Hot Cell to the West Target Station.

 TM#2 with C#3 has been moved from the north hot cell to ITW. Also for the up coming site wide power outage, the ISAC Target Hall crane has been turned off and powered down, also the remote crane console has also been power down as well so that mean no ISAC TV for a few days.

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

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

 TM2 with target UC#36 was connected at ITW.

 electrical checked in ITW

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.

2. 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.
   
3. 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.
   
4. 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.
   
5. 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.
6. 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.