 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. |
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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Thursday, January 30, 2020, 12:06, David Wang, ITW, Standard Operation, TM4, , ITW primary and secondary vacuum seals leak check.
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Connected LD to ITW(TM4) TP1. Base LR 0.0Xe-9 atm.cc/sec. Base pressure 0.0Xe-4 torr. All ITW primary and secondary air to vacuum seals are helium spray
checked. There is a 5XE-9 atm.cc/sec leak on exit2 module top cover plate o-ring seal. The location is on west side, south corner of the plate.
Hi- vacuum resin are sprayed to leak area, and leak checked again. The leak is gone. The other seals on ITW vacuum vessel are good. |
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Tuesday, January 24, 2023, 07:21, David Wang, ITW, Maintenance, , , ITW pit general clean up.
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ITW was cleaned with vacuum canister in Jan 10th. HV cage inside and blue nylon insulators were wiped. Garbage inside the pits
were cleaned out. |
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Tuesday, July 21, 2015, 12:38, David Wang, ITW, Repair, , , ITW external water leak on dump circuit has been fixed.
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| The leaking 1/8 NPT(M)-1/4NPT(F) adapter on the ITW dump circuit is replaced. |
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Friday, June 19, 2015, 11:43, David Wang, ITW, Repair, TM1, , ITW external water leak on dump circuit 6x
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There was an external water leak in ITW during the last beam running time. The leak started after the shielding blocks transfer(May 22). It cause a constantly
water level drop on S-tank(0.5 "/day average). Today , after the blocks are moved , the leak source has been found. Water seeped through a fitting
on ITW dump circuit pressure gauge. The leak water slowly flow around the TM1 on the tank flange. most of them are dried out, but left some stain on dump |
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Monday, October 29, 2018, 10:43, David Wang, Conditioning Station, Repair, , , ITW exit 2 leak check at TCS.
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I did a leak check this morning on exit 2 module at TCS. LD base leak rate is 4.00XE-9atm.cc/sec, Base pressure is 0.00 X E-4 torr. All seals,
bellows, and flanges are checked. The new FC5 bellow is good. There is a big leak up to 2X E-6 atm.c/sec has been found on IG1S side panel . The panel
itself will be replaced this time. Machine shop is working on it.. Two small leaks in E-9 atm.cc/sec range have been found on the o-ring |
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Tuesday, February 06, 2024, 13:36, David Wang, ITW, Maintenance, , , ITW exit 1 module tank flange o ring has been replaced.
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ITW exit 1 module tank flange o ring has been replaced. the old o r-ing was completely flat in slot without elastic property. tank flange, module
flange, and o ring slot were clean by acetone and canister vacuumed. Raised up module 3 feet and pulled new o-ring over module top so new o ring could
be installed without moving module out. after new o ring installation, craned down module to flange and raised up module 2 feet again to confirm |
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Tuesday, February 06, 2024, 13:28, David Wang, ITW, Maintenance, , , ITW exit 1 module has been disconnected and reconnected for o ring replacement
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ITW exit 1 module was disconnected for Exit module flange o -ring replacement yesterday. After oring replacement, the module has been reconnected.
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Monday, January 22, 2024, 09:50, David Wang, ITW, Standard Operation, , , ITW entrance module has been moved from SHC to ITW.
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ITW entrance module has been moved from SHC to ITW. A slightly bump on module shielding block bottom side corner to tank vessel side when lowed module
into tank. No big concern on this slight bumping. Otherwise the move is perfect.
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