 Thursday, November 22, 2018, 08:55, Anders Mjos, ITW, Repair, TM2, UC#25, ITW:FC5 safety signal limit switch installed 
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| Yesterday Diagnostics group installed a temporary external limit switch to provide the in signal to the safety system. |
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Friday, January 06, 2023, 10:38, David Wang, ITW, Standard Operation, TM2, , ITW/TM2 vacuum vessels leak check and TM2 internal cooling lines helium pressure test.
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ITW
and TM2 primary and secondary vacuum vessel leak check is done. Leak detector is connected to ITW TP1. Base leak rate on leak detector is 0.0 x E-9
atm.cc/sec. See attachment for the result. No big issue. Two old leaks we found last year at location D and E disappeared in this check. |
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Monday, February 13, 2023, 09:57, David Wang, ITW, Maintenance, , , ITW/ITE primary vacuum back up lines and BVs leak check in target pit.
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In past two weeks, ITW/ ITE primary vacuum back up lines and BVs in ITW/ITE pit have been leak checked. ITW BV1 and BV2 on back up line side were
leak. They are replaced with old leak free BVs. ITE TP2 NW25 SST flexible line right after pump were leak . It is replaced with new NW25 SST
flexible line. Two leak were found on ITW side KF 50 O-rings connected to NW 50 SST flexible coupling. They were replaced with new KF50 o-rings. After |
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Thursday, January 24, 2013, 13:30, David Wang, ITW, Standard Operation, TM1, , ITW-TM1 2013 winter shut down leak check.
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2013 winter shut down ITW-TM1 primary vacuum vessel, secondary vacuum vessel, and water lines leak check: connected leak detector to TP2(primary and
water lines) and TP4S (secondary). base leak rate 0.0xE-9atm.cc/sec,base pressure 0.0XE-4torr. Sprayed helium to all primary vacuum seal and there is no
response on leak detector. Helium pressurized all water lines(except HS) at 70psi ,3mins.Tube heat(+) no response, tube heater(-)1.6xe-9atm.cc/sec, target |
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Monday, May 16, 2016, 11:16, David Wang, ITW, Standard Operation, TM1, , ITW, TM1 turbo-pumps are swithched off
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| I let isac opp switched off ITW turbo-pumps. The argon vent valve in electrical room is opened. The ITW argon venting will be started soon. |
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Tuesday, January 22, 2019, 09:56, David Wang, ITW, Maintenance, TM2, , ITW water system maintenance.
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ITW water system maintenance is done. All working paddle wheels and coils are replaced. ITW water system polyurethane tubes are replaced as well. Two
3/8" leak small valves on return lines are replaced. 85 liters of tritium water are transferred from storage tank to B2 level holding tank. LALC water
are refilled into S-tank. Restarted pump and checked system. Everything works fine now. No water leak has been found so far. |
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Tuesday, July 03, 2018, 14:38, David Wang, ITW, Standard Operation, , , ITW water signals interlock check.
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| Annual ITW water signals interlock check are done. Everything works good. |
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Friday, April 08, 2016, 08:48, David Wang, ITW, Standard Operation, , , ITW water signal interlock check.
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I did a ITW water signals interlock check with ISAC opp. They are checked once a year before first beam on.
2016-04-13 Same test is done on ITE also. Everything is good. |
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Friday, January 24, 2020, 08:19, David Wang, ITW, Standard Operation, TM4, , ITW water signal interlock check.
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ITW water signal interlock check is done. Everything works fine. ITW 2A2 tank water signal is broken and is not ok on XT2A2 page. I will fix it
next week. |
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Tuesday, May 30, 2023, 14:15, David Wang, ITW, Standard Operation, , , ITW water signal interlock check is done.
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ITW water signal interlock check is done. All ITW water signals including HS, EE, Coil , Ta, Tu, MSP, C-window, HVC1, HVC2, 2A-dump, 2A -shielding plug,
2A-tank, 2A-window, and 2A-collimator are checked. All water signal interlock work fine. |
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Friday, May 22, 2020, 13:26, David Wang, ITW, Repair, , , ITW water leak.
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A water leak was found on a fitting connecting ITW dump return line pressure gauge on top of exit module. TM tank flange, o-ring slot and o-ring were
contaminated by water and water rust. Frank and I cleaned the flange and o-ring slot . We changed a new TM tank o-ring, vacuumed around other 3 module
flanges. The leak fittings with pressure gauges were removed . I put a blind cap on removed fitting spot.. Water are switched back to ITW. No leak on blind |
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Tuesday, September 10, 2019, 14:04, David Wang, ITW, Standard Operation, , , ITW water interlock check.
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| ITW water interlock check is finished. Everything is good. |
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Thursday, March 04, 2021, 11:20, David Wang, ITW, Maintenance, , , ITW water flow wheels and coils replacement.
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ITW water flow wheels and coils are replaced. Wheels and coils on Oven, Tube, HS, EE, MSP, Febiad coil, containment box window, dump,dump plug, 2A window,
and tank return circuits are replaced with new parts. |
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Thursday, January 06, 2022, 10:37, David Wang, ITW, Standard Operation, TM2, , ITW vacuum vessel and TM2 internal cooling lines leak check in pit.
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Frank and I finished ITW and TM2 leak check. TM2 internal water-cooling lines are leak free. They passed 70 psi helium pressure test. We found some
small leaks on ITW primary and secondary vacuum vessel. I list them here:
Exit module 2 service cap top plate to cap body O-ring at SW corner. Leak rate 2XE-8 atm.cc/sec. It is an old leak we found |
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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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Tuesday, September 01, 2015, 10:38, David Wang, ITW, Maintenance, TM2, , ITW top tank flange clean up and r-ring replacement.
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During last run， ITW dump circuit had a water leak on an adaptor below the pressure gauge. The top tank flange, slot, and O-ring were water contaminated
by the leak. I removed the old o- ring, cleaned up the flange and o-ring slot, and put a new o-ring into the flange. Some pictures will be attached
in this mail later. |
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Tuesday, April 28, 2015, 10:26, David Wang, ITW, Standard Operation, TM1, UCx12, ITW target pit o-ring seal replacement.
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Dan and I replaced ITW target pit o-ring seal(.275DIA X42"ID). It is an annual job before first beam to ITW. The old o-ring was moved and the groove
was vacuum cleaned. The new o-ring has been installed properly. |
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Thursday, January 12, 2017, 14:24, David Wang, ITW, Standard Operation, TM2, , ITW primary and secondary vacuum vessel winter shut down leak check.
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TM2 is located in ITW for this leak check. Leak detector is installed between ITW BV2s as before. LD base leak rate 0.0XE-9atm.cc/sec, base pressure
0.0XE-4 Torr. First , I leak checked dump module top flange seal which a small leak was found in last year winter shut down. This time,all ITW turbo-pumps
cooling fans are switched off during the check. Lots helium are sprayed around the dump module top flange this time. I did not see any response on LD. |
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Friday, January 03, 2025, 10:41, David Wang, ITW, Standard Operation, TM4, UCX46, ITW primary and secondary vacuum vessel leak check for 2025 shut down
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ITW primary and secondary vacuum vessel leak check for 2025 shut down has been done. Also,TM4 internal water line helium pressure test has been
finished. Both results are normal. There are two small old leak on EXit 1 and Exit2 module top plate o-ring under 1Xe-8 atm.cc/sec which we
knoew in past years test. resin spray on leak area reduce the leak ratee below 5Xe-9 atm.cc/sec. No concern on these small leak. See attachment |
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Wednesday, January 03, 2024, 14:03, David Wang, ITW, Standard Operation, TM2, Ta#66, ITW primary and secondary vacuum vessel leak check and TM2 water lines helium pressure test.
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ITW primary and secondary vacuum vessel leak check and TM2 water lines helium pressure test are done today. No major concern. see attachment for small
air to vacuum leak we found. TM2 water lines helium pressure test is fine. HS and window line leak rate are 1.4Xe-8 atm.cc/sec. all other
water lines are below 3.0XE-9atm.cc/sec. |
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