 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. |
Tuesday, July 03, 2018, 14:42, David Wang, ITW, Standard Operation, TM2, Nb#8, TM2 has been connected to ITW. 
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TM2 has been connected to ITW. All turbo pumps are started. See attachment for connection checklist. |
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Thursday, August 02, 2018, 07:57, David Wang, Conditioning Station, Standard Operation, , , Leak check on TM2 UCx #23 @ TCS and SHC.
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I did a helium pressure test on TM2 HS line at TCS. At 70psi helium, the leak rate is 2.5 xE-7 atm.cc/sec. I think this is the number that close to result before which is 1.7xE-9 atm.cc/sec. WE know there is a small leak on this water block seal. Chad and I did helium spray check yesterday at SHC. It was good at bottom scale. No much worry on this low E-7 range leak. |
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Tuesday, August 28, 2018, 14:19, David Wang, ITE, Standard Operation, TM4, Ta#56, TM4 Ta#56 disconenction.
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TM4 has been disconnected in ITE this morning. See attachment. |
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Thursday, August 30, 2018, 07:42, David Wang, Conditioning Station, Standard Operation, TM4, , TM4 has been connected to TCS.
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TM4 has been connected to TCS. vacuum system and water system are started. Everything looks fine. |
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Thursday, August 30, 2018, 07:46, David Wang, Conditioning Station, Standard Operation, TM4, , TM4 HS line leak check at TCS and SHC.
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Chad and I leak checked TM4 HS line after UCx 24 is installed. No leak at 5xE-9atm.cc/sec. Today, I did helium pressure test on HS line at TCS. No leak at 70 psi helium 0.0xE-9 atm.cc/sec. |
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Tuesday, September 04, 2018, 08:18, David Wang, Conditioning Station, Standard Operation, TM4, UCx 24#, Stppped TM4 and TCS vacuum and water system at TCS.
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I stopped TM4 and TCS vacuum system at TCS. TCS and TM4 is venting with argon now. |
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Friday, September 07, 2018, 10:47, David Wang, ITE, Repair, TM4, UCx24, TM4 TP2 replacement
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TM4 TP2 could not be started after module was connected back to ITE on Sep 04th. It was replaced with a new pump on Sep 05th. The new pump works fine. |
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Friday, September 07, 2018, 10:55, David Wang, ITE, Standard Operation, TM4, UCx 24#, TM4 has been connected to ITE/ Checklist
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TM4 has been connected to ITE on Sep 04th. See attachment for checklist. |
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Friday, September 21, 2018, 10:06, David Wang, ITW, Standard Operation, TM2, UCx23, TM2 was disconnected in ITW.
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TM2 was disconnected in ITW this Tuesday. See attachment for checklist. |
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Friday, September 21, 2018, 10:07, David Wang, ITW, Standard Operation, TM2, SiC nano, TM2 with SiC nano target was has been connected in ITW.
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Tm2 with SiC nano has been connected in ITW. See attachment for checklist |
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Tuesday, September 25, 2018, 07:54, David Wang, Conditioning Station, Repair, TM3, , TM3 is connected for HV test at TCS.
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water loops are by passed on top. All bias, EE, and EL are tied together. Started water system. |
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Wednesday, September 26, 2018, 07:14, David Wang, Conditioning Station, Repair, TM3, , TM3 HV test at TCS.
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I did a HV test on TM3 at TCS yesterday. HV Ramp up speed: 1KV per 5 minutes when below 30KV,1KV per 10 minutes from 30-36KV. There is no major spark below36 KV . I could see lots small and big vacuum response on IG1 and PNG2 when conditioning from 30-36 KV, especially when closing to 36 KV. However, At 36.4 KV, There is a big continuous spark occurred. It could not be stopped until I lowed the HV to 14KV. I have to ramp up from 14 KV again. This behavior on TM3 HV test is same as before we saw. The module can not pass 36KV at present condition. During the test., EL is tied to 60KV bias. The HV cover on TM3 top is installed. And, Service tray cover plate is installed on TM3. |
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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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Wednesday, October 03, 2018, 14:16, David Wang, South Hot-Cell, Standard Operation, TM4, Ta #57, Leak check TM4 Lp Ta# 57 at SHC.
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Tried to leak check TM4 Ta57# at TCS. LD failed to pump down properly at fine range. It always tripped at 4 torr. I cheeked all vacuum lines seals and adapters on top of module to LD. Everything is good. Chad said the VCRs at SHC can not be tightened any more. Discussed with Anders, we decide to move module TCS and helium pressure test there. The same difficult happened last time on TM4 UCx24# at SHC when leak check. But,it is solved by pressurize the line at SHC last time.
The HS line was pressurized with 70 psi helium on Oct 04th at TCS.. LD 0,00X E-9atm.cc/sec no change in 2 minutes. No leak. |
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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.
Note only a megger check was performed on the affected steering lines. Open load was measured on all lines. (Travis Cave) |
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Wednesday, October 10, 2018, 07:52, David Wang, ITE, Standard Operation, TM4, Ta#57, TM4 has been connected in ITE.
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TM4 has been connected in ITE. see attachment. |
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Tuesday, October 23, 2018, 10:45, David Wang, ITW, Standard Operation, TM2, SiC nano, TM2 was disconnected in ITW.
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TM2(SiC nano) has been disconnected in ITW. See attachment |
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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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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 between service cap steel welding frame and the whole cap top cover plate in different location . All bolts on the top plate pressing down the o-ring are very tight. I can do nothing on them. However, I sprayed some vacuum seal around the leak area. The leaks are small and close to ITE TP1S. I don not think we have to replace it at this moment. Basically, The module is good to move to ITW tomorrow morning. |
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