 Friday, January 12, 2024, 10:53, David Wang, South Hot-Cell, Standard Operation, , , ITW entrance module has been moved from ITW to SHC.
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ITW entrance module has been moved from ITW to SHC. The move is smooth. I cleaned entrance module tank flange and o r-ing slot. entrance
module tank flange o ring is replaced . |
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Thursday, January 11, 2024, 13:57, David Wang, ITW, Standard Operation, , , ITW entrance module has been disconnect.
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| ITW entrance module has been disconnected per document190510. It will be moved to SHC for diagnostic group tomorrow. |
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Monday, May 13, 2019, 11:22, David Wang, ITW, Repair, , , ITW entrance module has been connnected.
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| Entrance module has been connected back to ITW. Everything is normal. |
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Thursday, February 15, 2024, 13:52, David Wang, ITW, Standard Operation, , , ITW entrance module and exit 1 module leak check after module move and tank flange orings replacement.
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ITW entrance module and exit 1 module leak check on module service cap/top air to vacuum seals and module to tank flange o-rings have been
done. all seals and o rings are leak free to 0.0 xE-9atm.cc/sec except one leak ( to low E-6 atm.cc/sec) on ITW RV4 KF50 o-ring was found. It caused by
a cross o ring surface scratch on KF 50 flange. the scratch was sanded and polished out. on second time leak check, it is leak free. |
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Tuesday, February 07, 2017, 10:34, David Wang, ITW, Maintenance, , , ITW clean up
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ITW has been cleaned up today. All station are vacuum cleaned. I wiped all HV cover and HV area including conductors and insulators. The black
foams which are used to wrap around TP back up line are degrading now. I removed most of these foams. Also, Some obsolete water lines are moved
our of station. All waste are bagged . they will be surveyed and stored(or disposed) according to radio-active level. |
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Thursday, May 02, 2024, 18:48, Carla Babcock, ITW, Standard Operation, , , ITW cage setup
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ITW gas lines pumped down to 2e-3Torr on leak detector with leak rate in the low e-7 atm-cc/s. Gas bottles opened at 3psi and labels in epics changed
to reflect correct setup. switch box set to cathode mode, checked that anode wire was at HV common.
note ballast is removed from ITW now to be used in ITE so that line is blanked off. |
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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. |
Friday, April 20, 2018, 15:33, Keith C Ng, ITW, Repair, , , ITW beam tube repair job 
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2A2 window has been removed from ITW and beamlines has removed the beamtube from the penetration. The penetration has been sealed with plastic sheeting
and duct tape to maintain the ventilation depression between the 2A tunnel and the Target Pit.
Window is currently stored in a lead flask in the target hall. Window fields are 26 mSv/h OC, 1.2 mSv/h at .5m. There is a 10 uSv/h field outside |
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Friday, April 27, 2018, 15:06, Keith C Ng, ITW, Repair, , , ITW beam tube repair 6x
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Vacuumed out remainder of debris from the wall penetration, removed cradle and checked condition. Down stream support bracket sees advanced stages of
material loss (OBO 20-30% loss). See attached photos.
RPG reports that the removed beam tube has 15k CPM on the interior of the beam tube. |
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Thursday, September 12, 2019, 09:26, David Wang, ITW, Repair, TM4, , ITW bad vacuum issue and trouble shoot.
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ITW secondary vacuum was bad in last two days after TM4 was connected in ITW. Today when check the exit 2 module, I found a small needle valve on exit
2 module top was slightly opened for some reason in past months. The valve is closed . ITW vacuum is returned to normal status. |
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Monday, February 12, 2024, 18:44, Carla Babcock, ITW, Maintenance, , , ITW annual HV testing
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ITW was set up for HV testing - water is running and at a high resistivity due to injected N. Einzel lens is attached to ground. Everything else is as
normal. The module plug is in so no vacuum bypasses were needed. Very easy to ramp to 60kV. Sat at 60 for about 1.5hrs with maybe 1 spark (hard to say
from the strip tool data). Current draw was about 176uA. Data dumped as isac/data/ITW_HVtesting_shutdown2024 |
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Wednesday, February 01, 2012, 09:54, David Wang, ITW, Maintenance, TM1, , ITW and TM1 winter shut down vacuum leak check
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ITW and TM1 winter shut down vacuum leak check had been finished yesterday.All ITW primary vacuum vessel, secondary vacuum vessel, and TM1water lines
had been leak checked.No any leak has been found .The ITW and TM1 are both leak tight.Some detail information below:
TM1 and ITW primary vacuum vessel and water lines: The leak detector was hooked on BV2 after TP2. Calibrate leak detector.leak |
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Thursday, June 11, 2020, 11:49, David Wang, ITE, Maintenance, , , ITW and ITE thermocouple status.
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ITW - 2A2
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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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Monday, April 09, 2018, 06:36, David Wang, ITW, Standard Operation, , , ITW Turbo -pumps switch off
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| I asked MCR to switch off ITW TP3,4 TP1s,2s this morning. |
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Monday, February 03, 2020, 09:10, David Wang, ITW, Standard Operation, TM4, , ITW TPs are switched off. started of ITW argon venting.
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ITW is argon venting now.
Argon venting of ITW is done. It took about 4.0 to 4.5 hours to vent the ITW with 2-3 psi argon. The CG4 and CG4S showed 35 to 36 torr on epic
page when mechanical gauge is 760torr in electrical. Argon gas bottle is closed in electrical room. |
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Tuesday, August 07, 2012, 14:06, David Wang, ITW, Repair, , , ITW TP4S has been replaced
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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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Tuesday, October 23, 2018, 11:32, David Wang, South Hot-Cell, Maintenance, , , ITW RV4S leak check.
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| ITW RV4S (A and B) are leak checked. They are good. |
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Thursday, February 10, 2022, 12:24, David Wang, ITW, Standard Operation, , , ITW HV test without mdoule.
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Carla did the test. and reported the result as following: HV testing of ITW is complete. It was pretty well behaved up to 59.5kV, and sat at
59kV for 30mins with no sparks (that EPICS caught). There was some strange behaviour of the current between 51kV and 53kV - it was jumping by 20uA or
more - but there didn't seem to be any voltage response, and it went away after 53kV (though it returned on the way back down). The test was done in Feb |
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