 Tuesday, September 29, 2020, 14:28, David Wang, South Hot-Cell, Standard Operation, TM4, UC#31, TM4 UC#31 Electrical check and HS leak check 
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| Tm4 UCx 31# electrical check result. See attachment. |
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Monday, October 19, 2020, 12:52, David Wang, South Hot-Cell, Standard Operation, TM2, C#2, TM2 electrical and leak check at SHC
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| TM2 electrical check and leak check are done at SHC with C#2 target installed. The results are good. |
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Thursday, November 05, 2020, 10:23, David Wang, Spent Target Vault, Standard Operation, , , TM2 old source tray and TM4 optic tray in vault tray#9.
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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 |
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Wednesday, November 18, 2020, 15:28, David Wang, South Hot-Cell, Standard Operation, TM2, Nb#6, electrical check and HS leak check.
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| Everything looks good. A still short to P before target installation. We will float P,Q as before on module top. |
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Thursday, November 19, 2020, 09:00, David Wang, Conditioning Station, Standard Operation, TM2, Nb#6, Helium pressure check on TM2 HS line at TCS.
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| LD 0.0 Xe-9 atm.cc/sec , 70 psi helium 3 minutes. No leak. |
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Tuesday, November 24, 2020, 12:56, David Wang, ITW, Standard Operation, TM2, Nb#9, TM2 has been connected in ITW
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| TM2 has been connected to ITW. Turbo pumps are stared. ITW pumping down is fine so far. |
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Wednesday, January 06, 2021, 10:39, David Wang, ITE, Standard Operation, TM4, , ITE and TM4 annual leak check.
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| 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 ｉ |
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Monday, January 18, 2021, 12:29, David Wang, ITW, Standard Operation, TM2, Nb#9, ITW vacuum and TM2 water lines leak check .
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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 |
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Friday, January 22, 2021, 12:34, David Wang, ITE, Standard Operation, , , ITE HV test.
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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. |
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Monday, January 25, 2021, 10:57, David Wang, South Hot-Cell, Repair, TM4, , TM4 steers short investigation.
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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. |
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Monday, January 25, 2021, 12:33, David Wang, ITW, Standard Operation, , , ITW bias HV test
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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. |
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Wednesday, January 27, 2021, 14:30, David Wang, Cooling, Development, , , High active water system purging
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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. |
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Wednesday, February 03, 2021, 09:14, David Wang, Conditioning Station, Standard Operation, TM4, , TM4 from TCS to SW silo.
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TM4 is moved from TCS to SW silo. The moving is smooth.
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Wednesday, February 10, 2021, 11:34, David Wang, Assembly/Bench Test, Standard Operation, , , Old resin can and 2A window RH clamp field measurement at silo.
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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. |
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Wednesday, February 10, 2021, 13:30, David Wang, Safe Module Parking, Standard Operation, , , TM2 and TM4 electrical check without targets.
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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. |
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Friday, February 12, 2021, 07:07, David Wang, ITE, Maintenance, , , ITW and ITE clean up.
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| Vacuum cleaned ITW and ITE station. |
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Thursday, February 18, 2021, 12:33, David Wang, ITE, Repair, , , ITE:TP1S
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| ITE TP1S new pump is installed today. Reset pump life time on controller to 0 hr. |
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Thursday, February 18, 2021, 12:59, David Wang, Assembly/Bench Test, Maintenance, , , TM3 source tray and old resin can storage in lower cyclotron basement
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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. |
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Tuesday, February 23, 2021, 09:00, David Wang, Assembly/Bench Test, Maintenance, , , target staion vacuum pumps inspection.
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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. |
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Tuesday, March 02, 2021, 08:12, David Wang, Conditioning Station, Standard Operation, , , TCS leak check.
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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. |
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