 Friday, August 16, 2019, 08:51, David Wang, Conditioning Station, Repair, TM4, , TM4 waterlines helium pressure test at TCS.
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LD base leak rate, 0.0Xe-9atm.cc/sec. Helium pressure, 70psi. 5 minutes each circuit. No response on all water line except containment box window which
has a VCR leak issue now. Window line leak rate, 2.3Xe-4 atm.cc/sec. |
Tuesday, January 24, 2023, 07:17, David Wang, ITE, Standard Operation, TM4, UCx#41, TM4 water lines helium pressure test 2023. 
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TM4 water lines helium pressure test was done yesterday at ITE. All water lines were air purged one day ahead for the test. No leak has been
found on TM4 waterlines during the test. See attachment for detail |
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Thursday, January 08, 2015, 08:04, David Wang, ITE, Standard Operation, TM4, , TM4 water lines have been disconnected in ITE and purged.
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| TM4 waterlines have been disconnected and purged in ITE. The TM4 vacuum system is still in operation. |
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Thursday, January 20, 2022, 08:18, David Wang, North Hot-Cell, Standard Operation, TM4, No target, TM4 was removed from NHC to S_W silo yesterday.
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| TM4 was removed from NHC to S_W silo yesterday. The remove is smooth and successful. |
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Tuesday, October 02, 2018, 09:49, David Wang, ITE, Standard Operation, TM4, UCx 24#, TM4 was disconnected in ITE.
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| TM4 was disconnected in ITE yesterday. See attachment for checklist. |
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Tuesday, November 01, 2016, 14:53, David Wang, ITE, Standard Operation, TM4, , TM4 was disconnected at ITE
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TM4 was disconnected at ITE this morning. It was moved to SHC after. No alpha alarm issue has been happened during and after move. The ventilation
pumping down procedure on ITE was fulfilled during the move. |
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Tuesday, November 01, 2016, 14:54, David Wang, ITE, Standard Operation, TM4, , TM4 was disconnected at ITE
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TM4 was disconnected at ITE this morning. It was moved to SHC after. No alpha alarm issue has been happened during and after move. The ventilation
pumping down procedure on ITE was fulfilled during the move. |
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Thursday, November 26, 2015, 06:25, David Wang, Conditioning Station, Standard Operation, TM4, UC#14, TM4 vacuum has been connected in TCS.
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| TM4 vacuum has been connected in TCS. All vacuum pumps were started yesterday. The pumping down of TM4 and TCS are good so far. |
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Friday, April 08, 2016, 07:10, David Wang, Conditioning Station, Standard Operation, TM4, , TM4 vacuum has been connected in ITE.
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| All turbo pumps are started yesterday. The pumping down is good over night. |
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Tuesday, June 27, 2017, 14:34, David Wang, Conditioning Station, Standard Operation, TM4, , TM4 vacuum has been connected at TCS
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| Turbo -pumps are started . The vacuum looks good so far. |
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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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Tuesday, October 09, 2018, 12:32, David Wang, Conditioning Station, Repair, TM4, , TM4 steers 4 pin feedthrough CF flange
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TM4 Steers 4 pin feedthrough CF flange is replaced due an inside feed through insulator broken. CF 25 cooper seal is replaced with a new one as well.
Travis did anelectrical check. after replacement. Everything looks fine.
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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:
"Top" is still top.
"Left" is bottom |
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Friday, April 30, 2021, 14:09, Luca Egoriti, ITE/ITW, Development, TM4, , TM4 resistance measurements for P2N
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Friday, April 30, 2021, 14:06
Anders and Luca
Resistance measurements on each electrical feedthroughs (A,B,C,D,E,I,P,Q,R,U,60kV,ground) taken with no target or no short attached to the module. |
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Monday, April 26, 2021, 13:02, David Wang, South Hot-Cell, Repair, TM4, , TM4 new steerer cable installation.
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New steerer cables are installed in TM4. Cables are properly routed in containment box and service cap top. After job, TP2 is installed back onto module
top. |
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Friday, June 21, 2019, 07:16, David Wang, South Hot-Cell, Development, TM4, , TM4 new source tray leak check at SHC.
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New source tray was installed on TM4 yesterday. LD was used to pump down all water lines. Tube heater +D circuit has a big leak around water block
area. At base LR5.5 XE-5 atm.cc/sec, base pressure 170 mtorr, When Chad moved this helium probe close to water block area, The leak rate on
LD went to maximum level right away. When the probe was moved out of water block area, the LR went back to base level. The test repeated again with same |
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Wednesday, December 05, 2012, 13:26, Grant Minor, South Hot-Cell, Standard Operation, TM4, N/A, TM4 moved from SHC to South West Silo
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TM4 was successfully moved from the South Hot Cell to the South-West Silo remotely by Grant Minor, with help from David Wang and Don Jackson. The
move was without problems. See ISAC Work Permit 2012-12-04-1. |
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Thursday, February 06, 2020, 13:32, Adam Newsome, South Hot-Cell, Maintenance, TM4, , TM4 moved from Conditioning Station to South Hot Cell
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| TM4 was moved from conditioning station to south hot cell in preparation for wiring replacement. No target. |
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Friday, July 26, 2019, 11:28, David Wang, South Hot-Cell, Standard Operation, TM4, , TM4 move from SHC to TCS.
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Tm4 has been moved from SHc to TCS without containment box. It is a new source tray on TM4. A layer of plastic sheet was put on TH floor on module
pass route during the move. |
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Tuesday, November 01, 2011, 11:50, David Wang, Conditioning Station, Standard Operation, TM4, , TM4 leak test on conditioning station
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I did a leak check again on TM4 today. This time, the leak detector pump to the bottom on both base pressure(0.0xE-4 torr) and base leak rate(0.0xE-9
atm.cc/sec). All high vacuum gauges on TM4 and conditioning station at -6torr range.IG1 is 3.3-6torr,PNG5(top of service cap)is 6.5-6 torr, and the PNG4(bottom
of the vessel )is 8.7-6torr. For air to vacuum leak checking, I checked the panel we moved last week on service cap by spraying helium around the panel. |
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