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.

TM4 is moved from TCS to SW silo. The moving is smooth.

Old resin can:  0.5 meter 360 degree rotation above silo area, 350u sv/hr.   On contact  3.0 to 3.5 msv/hr.  It was replaced during 2017 winter shut down, and stored in silo since then.

2a window RH clamp: 0.5 meter, 160 usv/hr.  On contact, hottest spot 3.5msv/hr, general,1.8 msv/hr. 

 Both of them were raise out of storage silo with TH crane. Pole monitor was used for field check.

 TM2 at SMP under vacuum. TM4 at silo.  Frank and I did the tests. Everything is fine on TM4 check.  On TM2,  all mega test at 500V are around 200K ohms which is so abnormal. We will move TM2 to TCS and  start investigation there.

Vacuum cleaned ITW and ITE station. 

ITE TP1S new pump is installed today. Reset pump life time on controller to 0 hr.

TM3 old source tray, old target hall high active water resin tank, and  old 2A window RH clamp are transferred from TH to cyclotron lower vault basement 10 and 10A location for storage. They are placed beside and in front of old TM1 and TM2 source tray boxes which stored there in 2018. 

Edi and I inspected roughing pump ITM MP1, primary backup pump ITHMP1, and secondary backup pump ITHMP2. We checked oil level and color on all pumps.  Refilled lubricant to ITMMP1. ITHMP1 and MP2 oil level is fine. ITH MP1 oil color is darker than MP2. But, both them are ok still. Shielding block has been restored after the job.

TCS leak check: TCS IG1S1.6 XE- 6 torr. LD  0.0XE-9atm.cc/sec.We used a long pole to spray helium to TCS vacuum seals on diagnostic box and vessel body. Lots helium have been sprayed around the check area.  no leak has been found.