 Tuesday, June 23, 2020, 10:56, David Wang, Safe Module Parking, Standard Operation, , , SMP annual service.
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Dan and I did the SMP annual maintenance service today. Lid open/close , vessel rotation and limit switch check, lubricate chains, tighten fasteners, and visual inspection. Everything works fine. |
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Friday, June 26, 2020, 15:00, David Wang, ITW, Maintenance, , , ITW TP1 and TP1S.
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ITW TP1 can not be started yesterday. Also, TP1S was difficult to start , and had a high current draw after. We changed both of them in pit today. TP1 and TP1S are started successfully after replacement. |
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Monday, June 29, 2020, 10:09, David Wang, ITE, Standard Operation, TM4, P2N test., ITE turbo pumps are stopped
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ITE venting is in processing. |
Friday, July 03, 2020, 06:57, David Wang, ITW, Standard Operation, TM2, C#1, TM2 CONNECTION CHECKLIST 
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SEE ATTACHMENTS. EVERYTHING IS GOOD. |
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Friday, July 03, 2020, 07:03, David Wang, South Hot-Cell, Standard Operation, TM4, BEFORE TARGET INSTALLATION, ELECTRICAL CHECK BEFORE TARGET INSTALLATION.
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PQ SHORT TO RU. A TO PQ 1.8 M OHM AT 500 V. THE REST ARE OL |
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Friday, July 03, 2020, 13:23, David Wang, South Hot-Cell, Standard Operation, TM4, UCx#30, TM4 UCx#30 Electrical check and HS leak check
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Electrical and leak check are good. See attachment. |
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Monday, July 06, 2020, 07:54, David Wang, ITE, Standard Operation, TM4, UCx 30, TM4 has been connected in ITE connection
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TM4 has been connected in ITE. Vacuum pumping down is good so far. |
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Monday, July 06, 2020, 12:20, David Wang, ITW, Standard Operation, TM2, C#1, Five shielding blocks to ITW
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Five shielding blocks are transferred to ITW |
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Tuesday, August 18, 2020, 09:06, David Wang, ITW, Standard Operation, TM2, , TM2 and ITW entrance module have been disconnected in ITW
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Tm2 and itw entrance module have been disconnected in ITW. I will attach disconnection checklist later. |
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Wednesday, August 26, 2020, 09:52, David Wang, South Hot-Cell, Standard Operation, TM2, Ta#60, Ta#60 target electrical check and leak check at SHC.
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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. |
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Thursday, August 27, 2020, 08:21, David Wang, Conditioning Station, Standard Operation, TM2, Ta#60, Helium pressure check on TM2 HS line at TCS.
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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. |
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Thursday, September 24, 2020, 11:25, David Wang, Conditioning Station, Standard Operation, TM4, UC#31, TM4 HS line leak check at SHC and TCS.
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Both helium spray and helium pressurize on TM4 HS line withUCx31 target are done at SHC and TCS. No leak. |
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Tuesday, September 29, 2020, 12:12, David Wang, ITE, Repair, TM4, , TM4 steerers staus after" left " grounding issue, and first stage investigation
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Left (short) is switched with bottom. So on module:
"Left" is bottom in module actually
"Bottom and Right" is Left and right in module actually.
For the connection in ITE:
Left cable is connected to "left" ( bottom in module actually)
Top cable is connected to " Bottom and Right"( left and right in module actually)
Bottom and Right cable is connected to "Top" which is top in 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. |
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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
Nov 2nd 2020, max 7.11m sv/hr, min 2.5msv/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 ｉｎ ＴＭ４ ａｒｅ ｇｏｏｄ． Ｎｏ ｒｅｓｏｐｎｅ ｏｎ ＬＤ ｄｕｒｉｎｇ ｔｅｓｔ． |
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