I leak checked TM2 at CS this afternoon which including air to vacuum check on service cap and helium pressure test on water lines. There is a small leak on water line R ,U (COIL1) during the helium pressure test.. Below 20 psi helium, there is no leak on it. But , once the helium pressure is increased over 20 psi, it showed up on Leak Detector. At 60 psi helium, the leak rate is 9.4xE-9 atm.cc/sec. For detail information, See attachment.  All other water lines and air to vacuum seals are good.

Updated the schedule before the weekend 2015-07-03. See attachment 1,2

Updated the schedule according to present TM2 refurbishment process. See attachment 3,4

CS TP1S had been replaced with a new TP-301 pump this morning.The old pump was broken last week.

Chad and I leak checked coil line(R,U) on TM2 at SHC yesterday. The leak detector was pumped down to 0.0Xe-9 atm.cc/sec before the check. Chad sprayed helium on the soldering joints connecting the cooling copper lines to the small holding blocks for the coil terminal(R,U).  After sprayed helium 2 seconds, I saw the leak rate on LD started to climbed up. The highest leak rate is 4.0xE-8 atm.cc/sec. It is a very positive response. We waited the leak detector pumped back to 0.0xE-9am.cc/sec, and tested again on the same joints. The result is same. Chad also sprayed helium on the R,U water blocks to check the C-seal. I saw a delayed tiny response on LD ( from 0.0 to 1.3xE-9atm.cc/sec). We think this tiny response is caused by the helium drifting to the leak soldering joint, but not a real C seal leak.

July-06, 2015. Chad , Grant and I did the bubble test on R,U water blocks. We suspected the leak on the R,U circuit is from C seals on the water blocks so we did this test first. I applied both air and helium to R,U circuit , Chad applied snoop soap on the R,U water blocks.The air and helium pressure was increased from 40 psi to 90 psi Max step by step.Chad did not see any bubbles on the water blocks during the test. Since we did not find the leak source, we decided to do vacuum helium check on the all joints and c-seals of the R,U lines later.  Finally, We found the leak by vacuum helium spray the day after this bubble test. See other e-log.

TM1 and CS  vacuum system are connected. All turbo-pumps are started. The new TP1S works fine also. The pumping down looks good so far. During the TM1 and CS roughing down time, Joe .M noticed a Rn-220 level surge up in TH . Then,the Rn220  level slowly dropped back. Anders suspected this Rn-220 surging is related to the TM1 roughing down at CS. We decided we will stop the pumps , vent the CS , and roughing  again tomorrow. During the same time Joe will monitor  Rn-220 level in TH to see if the surging is repeatable. We want to learn more on this TH Rn-220 issue.

Chad and I leak checked the coil 1 circuit(R,U) after rebuilt coil line is installed on TM2 source tray. The pumping down on the circuit is very quick and smooth. The LD base lake rate 0.0xE-9 atm.cc/sec. Base pressure0.0xE-4 torr.

Chad sprayed lots helium on the R( coil 1+)and U(coil 1 -) water blocks. During  1 minute waiting time, there is no any response on LD. The R and U water blocks and C-seals are leak tight.

Update the TH schedule according to present TM2 refurbishment process. See attachments 1,2

2015-07-20 , Update the TH schedule after some changes on TM2 and TM4 arrangement. See attachments 3,4

Target pit Hepa filter has been replaced today. There is 500 counts on swipe which is taken inside of the replaced filter. The field measurement on the filter wood box  is less than 0.5 usv/hr on contact. Right now,The outlets of the old filter are sealed with thick plastic and duct tape. The whole filter is wrapped with plastic sheet and tape. It has been moved to SHC ante room.  It will be moved out of there by Tony.N soon with RPG help.

The leaking 1/8 NPT(M)-1/4NPT(F) adapter on the ITW dump circuit is replaced.

Update Target Hall schedule after the changing on TM2 process. See attachment 1,2

Dan and I moved 5 shielding blocks from ITE to block storage area. The move is smooth.

Chad and I leak checked the HS line at SHC after UCX target installation. On first round helium spray, one of VCR fitting has a leak to E-6 atm.cc/sec range. Chad tightened the fitting, and solved the problem. We leak checked both VCR fittings twice. No leak. The line will be helium pressured at CS tomorrow.

The yellow steel plug is put on SHC in TH. The spent target is inside the SHC.The field around the SHC area in TH is so high that we have put it on. It will be moved out on this Thursday just before the spent target move. 

I connected the CS  vacuum system  to TM4. The CS and TM4 turbo pumps are started. Everything is good so far. The HS line will be pressured with helium tomorrow for leak checking. The CS and TM4 will be vented with Argon on Wednesday morning as planned before moved to ITE.

I did the helium pressure test on TM4 HS line at CS. Applied 70 psi helium  2 minutes. base leak rate0.0x E-9 atm.cc/sec.  No response during the test. No leak.

Tony and I replaced the ITE TP4 turbo pump today. The pumping time on controller has been reset to 0. The replaced broken  pump is bagged and stored at west end of TH.

Dan and I stopped the CS and TM4 pumps. We are venting the CS with argon for UCX13 target.

Dan and I connected TM4 in ITE. We checked all water signals on ITE cooling circuits. Everything is good.

Weekly update of Target Hall schedule after so many jobs have been finished in this week.  See attachment 1, 2