Spent target UCx #33 has been repacked with a new pail and lid in NHC. Old pail #255. New pail # 267. Location: Vault slot 1C.  it is an investigation job for  a possible leak pail in vault.  

  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.

Carla did the test. That is what she wrote in Feb 04th:  "I am done with the HV testing at ITE - the results were the same as at ITW. It stayed at 59kV for 30 mins with no issues. Trying to go above 59.5kV is probably possible but a bit more risky. ITE also has a band, from 54-56kV, where the current jumps around like crazy".

UCX34# in pail 258(Vault lot 7C) has been repacked today. It is an investigation to find a possible leak source of radioactive Iodine in vault. The new pail number is 268. It is back to vault 7c . I wrote down the information in log book. The job is smooth today. I retrieved UCx 34 old pail and liner to TH. The liner from UCx#34 only has 3000 counts.  I bagged it. It could be used later. However, the pail has 500K counts contamination on bottom outside rim. It may accidently be slided out of plastic bag and touched the NHC table during the repackage. I bagged it and store it in silo area. When we do drum clean up, I will throw it in the drum.

Polyurethane  water cooling lines in ITE and ITW  HV shroud are replaced.  Both stations Ta, Tu, MSP, HS, Coil , EE in HV shroud are new lines.

UCx 32# P2N target in vault slot 1B is repacked is morning for Ferran to take out his samples( in two small plastic containers) stored in pail last July when Chad did the spent target job. The job went well.  Old pail # is 254# and new pail # is 233. It is put back to 1B in vault.

Replaced 9 old turbo pumps from ITE/ ITW and  one 2A3M20 wire scanner from ITE are transferred to cyclotron tunnel for storage. It is TH RAD waste cleanup task in winter shut down.

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. 

Annual ITE water signal interlocks check is done with Rob Shank. All ITE water signal  interlocks work fine.

TM2 with UCx#37 P2N target  was removed from ITE to NHC yesterday morning. The move is good.

Monday morning June 20th: TM2 with SiC # 42 was moved from ITW to NHC.

Monday afternoon: TM2 with no target was moved from NHC to SHC due to 10 pin connector guide pin loose issue. The guide pin has to be moved out in SHC due to NHC manipulator configuration limit .

Monday afternoon: TM2 with SiC # 43 was moved from SHC  to ITW.

all module moves are smooth.

With Ta#64 installed , TM4 HS line was helium pressure tested at TCS. base leak rate is 0.0XE-9 atm.cc/sec. HS line tested leak rate is 3x E-7 atm.cc/sec on 5 minutes 50 psi helium testing. Leak check result wasgood at NHC by helium spray method. We decided to apply water to HS and all other water lines still. The vacuum status is closely being watched. So far, TCS pumping down trend is still good. HS line supply water valve was switched on and off couple of times at TCS IG1 1.15 XE-6 range, and no vacuum spike was observed. More information will be logged in during the TM4 and target conditioning stage at TCS. 

HS line helium pressure test is done at TCS. No leak. I also leak checked gasline adapter and fittings on TM4 top. No leak.  1/4 copper gas line between module and ITE was leak checked yesterday. It is good.

TM2 with UCX#39 HS line helium pressure test is done at TCS. 70 psi helium 3minutes. No leak @0.0XE-9 atm.cc/sec.

TM4 HS line helium pressure test is done. 70psi helium pressure@ 3XE-8 atm.cc/sec . No leak.

17-Oct-2022 Comment by David Wang: On OCt 14th, Replaced a flexible hose on MP1S pump exhaust port,but did not solve the issue. High frequency vibration was sensed by hand on MP1S pump inlet and outlet ports. Pump height and position in pit are adjusted slightly in pit to reduce vibration. After, ITHCG2 and ITW CG4SA got a huge improvement in past 3 days. All back up line pressure are stabilized at normal operation status. Still, close watching on this issue is needed to ensure the present status is stabilized in long term.

The issue was returned after shielding block installation Monday morning at 8:30am. Investigated further,  I temporarily installed a turbopump used cooling fan on MP1s to improve pump heat dissipation. And a room fan is put outside on shielding blocks opening hole to increase air circulation into pit. Since then,  everything is perfect. All secondary turbo pumps current draw is around 0.5 to 0.6A which is the best.  I guess that short duo 10 pump life we observed in past could be related to high pump operation temperature in pit as well. We may increase the pump life if air circulation around the pump could be improved. A permanent solution is needed for it.

Helium 70 psi. tested 5minutes at base leak rate 0.9 xE09 atm.cc/sec on HS line.  No leak.

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.

TM4 water lines helium pressure test was done yesterday at ITE. All water lines were air purged one day ahead  for the test. No leak  has been found on TM4 waterlines during the test. See attachment for detail

 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.