Thursday, May 15, 2014, 14:38, David Wang, ITE, Repair, TM3, TM3, Bias short on ITE
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Anders and I opened the HV cover in ITE and did a visual check inside ITE HV cover and top of TM3.Bill was with us and took the pictures. There was nothing obviously wrong when we opened the HV cover in ITE. We disconnected TM3 high current cables from ITE. Then we did an electrical check on TM3.The TM3 was good and passed megga test (465Mohm at 500V). The module was good and was separated electrically from the ITE at that moment. Then, we went back to electrical room and measured the resistance between bias and ground with ground bar opened and power supply disconnect. It was still shorted at that moment .We thought the short is located inside HV chase between electrical room and ITE. Then, we went back to ITE again and reconnected TM3 back to ITE. We wiped two blue nylon insulators between bias and ground, and no obviously spark track or dirty on them. We put HV cover back in ITE locked area, and went back to electrical room again.We decided to do a final electrical check there. We thought the short should be still there and we just want to confirm it . But this time the short is gone. Everything goes back to normal. The short disappeared and We test bias to 5KV and the current looks normal now. |
Monday, June 02, 2014, 11:59, David Wang, South Hot-Cell, Standard Operation, TM1, , Leak check on TM1 HS water line with new UC9# target installed
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Chad and I leak checked TM1 HS and UC9# VCR fittings. No response had been found on leak detector during the test. I will do helium pressure test on it at CS later. |
Monday, June 02, 2014, 15:40, David Wang, Conditioning Station, Standard Operation, TM1, , TM1 and CS turbo pumps have been started
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TM1 and CS turbo pumps have been started. The vacuum readings are fine on all gauges. |
Tuesday, June 03, 2014, 09:12, David Wang, Conditioning Station, Standard Operation, TM1, UC9#, TM1 HS line helium pressure test and TM1 electrical check at CS 7x
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TM1 HS line helium pressure test and TM1 electrical check at CS under vacuum are finished. Everything is good. See attachment |
Monday, June 09, 2014, 10:33, David Wang, Conditioning Station, Standard Operation, TM1, UC9#, Stop TM1 and CS trubo pumps and ruff pump.
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The CS and TM1 is still under vacuum. They will be vented with argon tomorrow mornig |
Tuesday, June 10, 2014, 07:57, David Wang, Conditioning Station, Standard Operation, TM1, UC#9, TM1 are vented with argon and disconnected at CS.
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TM1 will be moved to ITW this morning. |
Tuesday, June 10, 2014, 14:02, David Wang, ITW, Standard Operation, TM1, UC9#, TM1 and ITW turbo pumps have been started.
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TM1 has been connected to ITW. It is pumping down in ITW with 6 turbo-pumps on. |
Tuesday, June 17, 2014, 10:46, David Wang, ITW, Standard Operation, TM1, UC#9, 5 Shielding blocks have been transferred from ITE to ITW.
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5 shielding blocks have been transferred from ITE to ITW. ITW is configured to take proton beam. Argon venting system for ITW is ready also. |
Thursday, June 26, 2014, 10:57, David Wang, South Hot-Cell, Standard Operation, TM3, , Leak check on TM3 HS water line with new target. installed.
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Chad and I leak checked the TM3 HS water line with new target installed. No leak has been found during the check. Leak detector base LR 0.0xE-9 atm.cc/sec, base pressure 0.0xE-4 torr. The line will be helium pressurized at CS later. |
Friday, June 27, 2014, 10:16, David Wang, Conditioning Station, Standard Operation, TM3, , TM3 HS water lines helium pressure test. at CS
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TM3 HS water line helium pressure test is done at CS. 70 psi helium , 3 minutes.Base LR 0.0xE-9 atm.cc/sec, base pressure 0.0xE-4 torr. No response. The line is leak free. |
Wednesday, July 02, 2014, 14:29, David Wang, ITE, Standard Operation, , , Reconnected TM3 in ITE.
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I reconnected TM3 in ITE. All turbo pumps have been started. The water supply to TM3 only in ITE. The HV keys are back to electrical room. |
Tuesday, July 08, 2014, 09:57, David Wang, ITE, Standard Operation, TM3, , 5 Shielding blocks have been transferred from ITW to ITE.
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5 Shielding blocks have been transferred from ITW to ITE. The ITE is configured to take proton beam. |
Wednesday, July 16, 2014, 11:28, David Wang, ITW, Standard Operation, TM1, , TM1 had been dsiconnected in ITW.
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The TM1 and ITW were vented with argon gas last night. TM1 had been disconnected in ITW this morning. |
Thursday, July 17, 2014, 10:13, David Wang, Conditioning Station, Standard Operation, TM1, , Leak check on TM1 HS water line with new target installed
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Chad and I leak checked TM1 HS waterline with new target installed at SHC. The LD base LR:0.0xE-9atm.cc/sec, base pressure: 0.0xE-4 torr. Chad sprayed helium on both VCR fittings and flushed helium around the target. No response has been found on leak detector. The target HS line is leak tight so far. I will do helium pressure test on this line at CS on next Monday. |
Thursday, July 17, 2014, 11:49, David Wang, Conditioning Station, Standard Operation, TM1, , TM1 and CS turbo pumps have been started
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I connected TM1 at CS. All turbo pumps have been started. The pumping down is good so far. |
Monday, July 21, 2014, 13:11, David Wang, Conditioning Station, Standard Operation, TM1, , helium pressure test on TM1 HS water line at CS.
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The TM1 HS line is pressure tested this morning with 70 psi helium at CS. No response has been found on leak detector. |
Tuesday, July 22, 2014, 07:32, David Wang, Conditioning Station, Standard Operation, TM1, , Stop TM1 and CS turbo pumps and ruff pump.
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Stop TM1 and CS turbo pumps and ruff pump. TM1 is disconnect at CS. It will be vented tomorrow morning and moved to ITW. |
Wednesday, July 23, 2014, 13:36, David Wang, ITW, Standard Operation, TM1, , TM1 in ITW.
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TM1 has been connected in ITW . The new roughing pump replaced on last Friday works good. I started all turbo pumps in ITW. The ITW TP1 controller was broken during the starting time. Dimo and I changed a new controller for ITW TP1 in electrical room. The pumping down is good so far. ITW water supplies to TM1 only. |
Monday, July 28, 2014, 14:37, David Wang, Conditioning Station, Development, TM2, , helium pressure test on TM2 tube heater +(D)and -(C)water lines. 7x
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- TM2 installed in Conditioning Station
- Varian Leak detector connected directly to Target Module 2 Service cap.
- Vacuum draw in Target Station with both module turbo pumps
- Leak detector baseline normal (10^-4 Torr, 10^-9 Std cc/s He)
- Since no Source tray is installed, and tube heater supply conductor is blanked off in target enclosure, it was necessary to test both supply and return points.
- For each line tested, 80 psi He was connected, and waited ~2 min to for a response on the leak detector.
- Lines tested:
- conductor D (tube heater), Supply -> no He response
- conductor D (tube heater), Return -> no He response
- conductor C (tube heater), Supply -> no He response
- conductor C (tube heater), Return -> no He response
- Based on this leak testing, both supply and return lines of conductors C & D are leak tight under 95 psi He (80 psig He supply to vacuum)
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Monday, July 28, 2014, 14:45, David Wang, Conditioning Station, Development, TM2, , turned off TM2 and CS turbo pumps.
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I turned off TM2 and CS turbo-pumps. TM2 will be moved from CS to silo tomorrow morning. |
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