Chad and I leak checked TM2 tube heater(+) water line yesterday afternoon. The water line was difficult to pump down on base leak rate, but LD  base pressure was fine . The base pressure on leak detector was pumped to 0.0XE-4 torr quickly. The base leak rate only could be pumped  to  4.5 xE-8 atm.cc/sec after 1 hour waiting time. All vacuum connections to leak detector  in the target hall were leak checked and they were good. Chad checked helium flow in SHC. He sprayed helium twice on tube heater(+) water block soldering joints. I did not see any response on leak detector in TH.The base Leak rate and base pressure did not move up during the test.  See attachment pictures.

Chad and I did a pressure test on TM2 tube Heater+(D) water line.I pressurized the D line with shop air from quick connectors(both ends) on service cap.chad applied bubble soap onto the D water block in SHC. The test started from 5psi,and increased 5psi each time to 40 psi. From 5 to 35 psi, no bubble has been found on water block. At 40 psi , bubble appeared from blind blank off seal , but not from soldering joints. Since the o-ring seal for the blank off is  vacuum seal , but not for pressurizing, It is understandable the seal could not hold 40 psi pressure air. No bubble had been found on the D water block soldering joints .See attachment pictures.

Bevan and I did a leak check on TM2 tube heater+ from inside service cap in TH. The leak detector base leak rate 0.0xE-9 atm.cc/sec, base  pressure 0.0xE-4totrr. One of side panel on service cap was opened. Bevan sprayed the helium to the "D" line inside the blue insulator.The helium flow was checked , and he sprayed twice. No response has been found on leak detector.  See attachment pictures

Chad and I  did the Leak checked TM2 tube heater (+) water line  with rubber insert plugged water block on " D"  in SHC. The Leak detector was very easy to pump down to the bottom leak rate and pressure. Chad checked the helium flow in SHC, and sprayed 10 second helium on  the block. There is no response had been found during the test. The test was repeated again and no leak has been found. See attachment pictures.

Chad and I did the pressure test on TM2tube heater+(D) water  line at SHC with shop air.We tested from 30psi to 80psi on both side of D line. The bubbles were found at 50-55psi on blank off seal in SHC.

David Wang wrote:

Chad and I did the pressure test on TM2tube heater+(D) water  line at SHC with shop air.We tested from 30psi to 80psi on both side of D line. The bubbles were found at 50-55psi on blank off seal in SHC.

 I would like to correct this E-LOG. There is no real  leaking bubble had been found during the whole test according to the information supplied by Chad  Fisher during  this afternoon meeting. I would like to attach some pictures took from TH during this test.

Chad and I did the leak check on TM2 tube heater (+) water line  with blank off( + elastic o ring seal) installed on "D"  water block in SHC. We got the same no leak result as we got with rubber insert this morning.

I did the helium pressure test on Tube heater+ line this morning. The vacuum on CS and TM2 are very good. The base lake rate on leak detector was 1.7xE-7 atm.cc/sec. Base pressure was 0.0xE-4torr.  I applied helium to the "D"line .The test started from 30psi up to 80psi on both side "D" line.The base leak rate slightly changed to 1.9xE-7 atm.cc/sec during the test,but not base pressure. At this base leak rate level, No obvious leak had been found . See attachment pictures. The test will be repeated later when the base leak rate could be pumped into E -8 or E-9(the best) range.            

I stopped turbo pumps and disconnected vacuum system on TM2 and CS. The TM2 will be moved to SHC for C seal installation on "D" water block.

Chad and I did the leak check   on TM2 tube heater (+) water line  with blank off and C-seal  installed on  WB at South Hot Cell.The line was easy to pump down to 0.0xE-9atm.cc/sec and 0.0XE-4 torr on leak detector. Chad flushed lot helium around the water block (10 sec spray). No response had been found on leak detector.

I did the helium pressure  test  on TM2 tube heater (+) water line  with blank off(C-seal) installed on  water block at CS.The leak detector was hooked directly to the top of the module this time. So base leak rate and base pressure were at the bottom scale on LD. 30 -80 psi helium was applied to the D lines(both side)  with10 psi   increasing each time. There is no any tiny response hasbeen found during the test. The lines are perfectly sealed. Also i sprayed the helium on the top of the service cap .All  air to vacuum seals on the top are good either. See attachment pictures.

TM1 has been successfully moved from silo to CS. The CS vacuum system is connected  to TM1. Turbo pumps on TM1 and CS have been started yesterday afternoon . The starting of TM1 turbos was easy. The pumping down over night is good so far.

ITE and TM3 Turbo pumps have been started successfully yesterday. The vacuum reading on all ITE high vacuum gauges are at low E-6 range after one night pumping down which are good so far. There is no any sign of leak on BL2A window and the flange seal on ITE side. Yesterday afternoon, Ron , Edi ,and I  did a leak check on the ITE BL2A window flange(2aTunnel side). The leak detector was hooked onto BL2A in tunnel. Ron and I supplied helium from TH  to the helium test line(located in  ITE pit) which  we have on ITE BL2A window flange.   The helium test line end nozzle is just located under  the bottom of the 2A window flange. Edi was in BL2A tunnel checking the leak detector. We supplies 10- 15 psi helium 3 times to the test line. Each time for 10 seconds. The helium flow was checked twice and they were good. The LD base LR was 2.2xE-5 atm.cc/sec, After 70 seconds , The leak rate on LD was increased to 5.3 xE-5 atm.cc/sec. The leak rate reading  recovered after 20seconds. There is no obviously conclusion where the leak is. At that moment, Ron said, he and Edi would like to do  some further leak check  in 2A tunnel,and I went back to my job.

Restarted TM1 and CS turbo pumps after the power off. Everything is fine .

TM1 air to vacuum and water lines leak check at CS are finished this afternoon. The leak detector  is hooked directly to TM1 service cap so the base LR at LD is 0.0xE-9 atm.cc/sec. I sprayed helium to all air to vacuum seal on the service cap, also applied 70 psi to all water lines(except HS) for 2 minutes each. There is no any tiny response had been found on LD. So All TM1 water lines(except HS) and air to vacuum seals are leak free. The HS circuit can not be tested at this time since the VCR caps are not installed. The turbo pumps at CS and TM1 will be turned off before I leave.  See attachment pictures.

With TM3 located in ITE, All air to vacuum seals  on ITE primary and secondary vacuum vessel have been leak  checked with leak detector hooked directly on the TM3 service cap.The base LR :00xE-9atm.cc/sec. The ITE IG1 was 1.6xE-6 torr which was good. No leak has been found during the checking.Also, the TM3 water lines(except HS) had been  pressurized with 70 psi helium on each for 2 minutes. There was no response during the test. The ITE and TM3 are good on leak checking.See attachment pictures

I connected ITW  vacuum system to TM4. TM4 and ITW turbo pumps have been started successfully. The pumping down is good so far.

With TM4 located in ITW, All air to vacuum seals  on ITW primary and secondary vacuum vessels have been leak  checked with leak detector hooked directly onto the TM4 service cap.The base LR :00xE-9atm.cc/sec. The ITW IG1 was 1.16xE-6 torr which was good. No leak has been found during the checking.Also, the TM4 water lines(except HS) had been  pressurized with 70 psi helium on each for 2 minutes. There was no response during the test. The ITW and TM4 are good on leak checking.See attachment pictures

Chad and I leak checked TM4 HS line with Ta#42 target on the module. The leak detector base LR 0.0xE-9 atm.cc/sec, base pressure0.0xE-4 torr. Chad applied helium to the joints, and flushed the helium around the target. No leak has been found.I will do helium pressure test on this circuit at CS later.

This Monday morning, Chad and I leak checked heat shielding circuit on TM3 with new target installed. The base LR on LD :0.0xE-9 atm.cc/sec, base pressure 0.0xE-4 torr. Chad sprayed helium twice on the VCR joints. No leak has been found. The circuit will be pressured with helium at CS.