 Wednesday, January 29, 2020, 12:37, David Wang, ITE, Standard Operation, TM2, , ITE primary/secondary vacuum vessel leak check.
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Leak check on ITE vacuum vessel is done. LD base leak rate 0.0XE-9atm.cc/sec. base pressure 0.0Xe-4torr. Sprayed helium on all ITE primary and secondary
vacuum vessel seals(including TM2). No leak . Also,70psi helium pressurized TM2 waterlines inside the module for each circuit 3 minutes. No leak
on all operating TM2 waterlines. |
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Monday, March 02, 2015, 10:52, David Wang, ITE, Maintenance, TM4, UCx, ITE primary and secondary vacuum vessels leak check.
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Dan and I leak checked ITE primary and secondary vacuum vessels with TM4 in ITE. The leak detector was hooked to ITE TP2 BV2. Leak detector
base leak rate: 0.0xE-09 atm.cc/sec, base pressure: 0.0xE-4 torr. All secondary vacuum vessel seals has been checked(helium spray), and no leak has been
found. On the ITE primary vacuum vessel, we leak checked every thing except the TM4 service cap and water lines inside the TM4. NO leak has been |
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Monday, January 10, 2022, 09:31, David Wang, ITE, Standard Operation, TM4, , ITE primary and secondary vacuum vessel leak check.
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ITE primary and secondary vacuum vessel leak check has been down. Base leak rate 0.0x E-9 atm.cc/sec on LD. Only 2.8 XE-9 atm.cc/sec leak
has been found on big T tank seal which is very tiny. all other seals are perfect leak free. No concern |
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Friday, February 02, 2024, 07:48, David Wang, ITE, Standard Operation, TM4, , ITE primary and secondary vacuum vessel leak check.
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ITE primary and secondary vacuum vessel leak check has been done. SST bellow for 2A3M19 wire scanner on entrance module top has a big leak to E-5
atm.cc/sec on tiny helium spray. The bellow will be replaced in March by probe group. The LD base leak rate is affected by this big leak so i cant keep
the LD scale at 0.0Xe-9 atm.cc/sec during the leak check. Other seal are leak free to 8XE-9 atm.cc/sec. I have no big concern on ITE vacuum seals status |
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Tuesday, January 07, 2025, 12:05, David Wang, ITE, Standard Operation, TM3, UCx #47, ITE primary and secondary vacuum vessel leak check for 2025 shut down
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ITE primary and secondary vacuum vessel leak check for 2025 shut down have been done. No leak. The TM3 waterlines helium pressure test will be
done at TCS when module is there.
TM3 water lines helium pressure test are done. 70 psi helium 3 minutes to each line( except HS which has no target on it ) . leak detector |
Wednesday, January 25, 2023, 06:52, David Wang, ITE, Standard Operation, TM4, UCx#41, ITE primary and secondary vacuum vessel air to vacuum seals leak check. 
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ITE primary and secondary vacuum vessel air to vacuum seals leak check was done this week. One leak has been found on IG1S feed through to entrance module
surface seal. It explains what we saw on ITE IG1S readings change(from low E-7 torr to 1Xe-6 torr) on December 22, 2022. This leak seal will be replaced
soon. |
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Wednesday, March 27, 2024, 09:52, David Wang, ITE, Standard Operation, , , ITE entrance module top and module flange o-ing to tank have been leak checked.
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| ITE entrance module top and module flange o-ing to tank have been leak checked. no leak at 0.0xe-9 atm.cc/sec. things are double checked. |
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Monday, March 25, 2024, 10:55, David Wang, ITE, Standard Operation, , , ITE entrance module has been reconnected in ITE pit.
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| ITE entrance module has been reconnected in ITE pit per document 190510. |
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Monday, March 25, 2024, 10:53, David Wang, ITE, Repair, , , ITE entrance module has been moved from TCS to ITE.
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| ITE entrance module has been moved from TCS to ITE. The move is smooth. |
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Thursday, March 14, 2024, 14:54, David Wang, ITE, Maintenance, , , ITE entrance module has been moved from ITE pit to TCS.
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ITE entrance module has been moved from ITE pit to TCS. The move is smooth.ITE entrance module top tank flange and o ring slot are cleaned, and old o
ring are replaced. |
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Friday, February 23, 2024, 06:36, David Wang, ITE, Maintenance, , , ITE entrance module has been disconnected.
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| ITE entrance module has been disconnected per document 190510. Its a preparation job for next month module moving out to SHC. |
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Wednesday, May 07, 2014, 10:08, David Wang, ITE, Repair, TM3, , ITE entrance module flange seal had been replaced. 7x
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ITE entrance module flange seal had been replaced yesterday.The flange and the seal groove were cleaned with Acetone before the new seal is installed.
See pictures |
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Tuesday, March 07, 2017, 14:41, David Wang, ITE, Maintenance, , , ITE dump plug water circuit is closed for ITE IG1S small surge.
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It is closed @ 2:35PM by closing supply side valve first , the return side valve of ITE dump plug .
Opened ITE dump plug circuit valves @4:28PM. ITE IG1S still at 1XE-6. No change before and after of circuit closing and reopeneing. |
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Monday, March 27, 2017, 06:33, David Wang, ITE, Standard Operation, , , ITE clean up
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| ITE clean up is done. HV cage inside is wiped. |
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Tuesday, January 02, 2018, 11:28, David Wang, ITE, Standard Operation, TM4, , ITE annual water interlock check.
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| Eric and I finished ITE annual water interlock check. Everything works properly. |
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Friday, February 15, 2019, 12:05, David Wang, ITE, Maintenance, TM4, , ITE annual vacuum leak check.
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Helium pressure test on all water lines: 70psi , 3 minutes. HS has a quick response to 9Xe-9atm.cc/sec for 20 seconds. No response on other lines. All
water lines are good. Air to vacuum leack check on ITE and TM4: TM4 IG1 / Steers side panel has a low E-6 atm.cc/sec leak. The o-ring need to be
changed when TM4 is located at TCS. All other air to vacuum seals are good on both primary and secondary vacuum vessel. |
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Thursday, February 15, 2024, 17:40, Carla Babcock, ITE, Standard Operation, , , ITE annual HV testing
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ITE was set up for HV tests - this time the module plug was not in so the BIAS and EE had to be bypassed. NOTE: ITE:BIASPLC must also be bypassed for
this to work. Currently it is located on the vacuum bypasses page, but may be changed to the optics page soon.
ITE was ramped to 60kV in steps of 1kV easily. It sat at 60 for about 1.5 hours with a current draw around 173uA. It was not entirely stable though, |
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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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Wednesday, January 18, 2017, 09:55, David Wang, ITE, Standard Operation, TM4, , ITE and TM4 2017 winter shut down leak check.
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ITE and TM4 2017 winter shut down leak check are finished. All ITE primary, secondary vacuum vessel and TM4 water lines are good. No any leak has been
found. |
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Monday, January 09, 2012, 14:44, David Wang, ITE, Maintenance, TM4, , ITE and TM4 2012 winter shut down leak check is completed.
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I did a vacuum leak check on all ITE primary vacuum vessel and secondary vessel.I also did a helium pressure test(80psi ) on all TM4 water lines. There
is no leak has been found.ITE and TM4 are both leak tight now.
ITE primary vacuum vessel and TM4 waterlines: |
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