Electrical and leak check are good. See attachment.

TM4 has been connected in ITE. Vacuum pumping down is good so far.

Five shielding blocks are transferred to ITW

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

Electrical check and leak check at SHC. NO leak. electrical check ok.   Before target on, A is short to PQ, RU is short to HS ( 60KV bias) as we measured before.

Helium pressurize on TM2 HS line at TCS is done.    Base LR is 0.0X E-9 atm.cc/sec.  70 psi helium 3 minutes.   No response.   Also, The TCS vacuum pumping down over night is good. 

Both helium spray and helium pressurize on TM4 HS line withUCx31 target are done at SHC and TCS. No leak.

Left (short) is switched with bottom. So on module:

Frank and I removed the panel, disconnected the "Left"cable  inside panel,  and checked  cable to ground resistance. "Left "is dead short to ground on ohmmeter check still. So the short could be on cable or inside source tray.  Further investigation is planned to confirm the short  location.

Tm4 UCx 31# electrical check result. See attachment.

TM2 electrical check and leak check are done at SHC with C#2 target installed. The results are good.  

TM2 old source tray and TM4 optic tray are stored together in vault tray#9. The fielding measurement at SHC post 0.5 meter distance:
 

March 1st 2019, maximum 14.6msv/hr, minimum 4.78 msv/hr

Nov 2nd 2020, max 7.11m sv/hr, min 2.5msv/hr.

Everything looks good. A still short to P before target installation. We will float P,Q as before on module top.

LD 0.0 Xe-9 atm.cc/sec , 70 psi helium 3 minutes.  No leak.

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

Frank and I finished ITE and TM4 primary and secondary  vacuum vessel  leak check.　ＬＤ　ｂｅａｓｅ　ｌｅａｋ　ｒａｔｅ　０.０ｘ－９ａｔｍ．ｃｃ／ｓｅｃ．　Ｎｏ　ｌｅａｋ　ｈａｓ　ｂｅｅｎ　ｆｏｕｎｄ．Ａｌｓｏ，　Ａｌｌ　ＴＭ４　ｗａｔｅｒ　ｌｉｎｅｓ　　ｈａｖｅ　ｂｅｅｎ　ｐｒｅｓｓｕｒｉｚｅｄ　ｗｉｔｈ　７０ｐｓｉ　ｈｅｌｉｕｍ　ｆｒｏ　３　ｍｉｎｕｔｅｓ　ｏｎ　ｅａｃｈ　ｃｉｒｃｕｉｔ．　Ａｌｌ　ｗａｔｅｒ　ｌｉｎｅｓ　ｉｎ　ＴＭ４　ａｒｅ　ｇｏｏｄ．　Ｎｏ　ｒｅｓｏｐｎｅ　ｏｎ　ＬＤ　ｄｕｒｉｎｇ　ｔｅｓｔ．　

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. 

ITE annual HV test is done. No module in station. The bias power supply has been ramped up to 49KV on control page. We still have voltage limit issue on this PS at 48KV so it only can go to 47.7 KV on PS panel. No major spark during test.. The test result is same as last year test which was did in March 2020. 

Cables were disconnected for steers in containment box. The Megga measurement (500V) result from the top of the module:

Left to right: OL, left to top OL,  left to bottom OL, right to top OL, right to bottom OL,  Top to bottom OL. And all of them to ground are OL.  No short on cables from module top to steers itself. The short should be inside the steers. It will be confirmed with directly test on steers.  

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. 

High active water are purged to holding tank at B2  level. There should be around 48 gallons are purged out of system. No purging on dump circuits on both ITW/ ITE.