 Wednesday, November 22, 2023, 12:24, Adam Newsome, Spent Target Vault, Standard Operation, , Ta#65, Spent Target Move
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The spent Ta#65 target was removed from the south hot cell and placed in the spent target vault. It was placed in pail #284 and placed in spot 2B. It was 41 mSv/hr at 1 m upon removal. Target index spreadsheet updated. |
Thursday, June 23, 2022, 07:11, Frank Song, North Hot-Cell, Standard Operation, TM4, Ta#64, electrical check 
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New Target Ta#64 was installed on TM4. Electrical measurement result is good. c/w attachment. |
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Thursday, June 23, 2022, 13:04, David Wang, Conditioning Station, Standard Operation, TM4, Ta#64, helium pressure test on TM4 HS line.
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With Ta#64 installed , TM4 HS line was helium pressure tested at TCS. base leak rate is 0.0XE-9 atm.cc/sec. HS line tested leak rate is 3x E-7 atm.cc/sec on 5 minutes 50 psi helium testing. Leak check result wasgood at NHC by helium spray method. We decided to apply water to HS and all other water lines still. The vacuum status is closely being watched. So far, TCS pumping down trend is still good. HS line supply water valve was switched on and off couple of times at TCS IG1 1.15 XE-6 range, and no vacuum spike was observed. More information will be logged in during the TM4 and target conditioning stage at TCS. |
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Tuesday, June 28, 2022, 14:13, Frank Song, ITE, Standard Operation, TM4, Ta#64, Module Connection
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TM4 with Ta#64 was connected in ITE. see attachment please. |
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Tuesday, August 09, 2022, 12:19, Frank Song, ITE, Standard Operation, TM4, Ta#64, TM4 with Ta#64 disconnection in ITE
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TM4 with Ta#64 has been disconnected in ITE. |
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Thursday, August 18, 2022, 10:13, Travis Cave, Spent Target Vault, Standard Operation, , Ta#64, Spent Target Move
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The spent Ta#64 target in the north hot cell has been packaged and placed in the spent target vault. Pail#273 spot #5C 86.6mSv/hr upon removal from the north hot cell. For detail on the vault see attached PDF. |
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Thursday, November 25, 2021, 10:33, David Wang, Conditioning Station, Standard Operation, TM4, Ta#63. , helium pressure test on TM4 HS line at TCS.
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Helium pressure test on TM4 HS line at TCS is done. LD base leak rate 0.0 xE-9 atm.cc/sec. Helium pressure 70psi. HS line had been helium pressurized for 5 minutes during the test. No response on LD. HS line with Ta#63 is leak free. |
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Tuesday, November 30, 2021, 11:03, David Wang, ITE, Standard Operation, TM4, Ta#63., Remotely remove TM4(Ta#63) from TCS to ITE.
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Remotely remove TM4(Ta#63) from TCS to ITE. The move is smooth and successful. |
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Tuesday, November 30, 2021, 12:51, David Wang, ITE, Standard Operation, TM4, Ta#63., Tm4 has been connected in ITE.
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TM4 has been connected in ITE. See attachment for checklist. |
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Thursday, January 20, 2022, 11:09, Travis Cave, Spent Target Vault, Standard Operation, , Ta#63, Spent Target Move
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The spent Ta#63 has been moved from the north hot cell to the spent target vault. It was place in pail#266 and
placed in spot #3B of the vault. see attached PDF for more details. |
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Thursday, July 08, 2021, 11:36, David Wang, Conditioning Station, Standard Operation, TM4, Ta#62, Remotely remove TM4(Ta#62) from SHC to TCS.
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Remotely remove TM4 (ta# 62) from SHC to TCS. The moving is smooth. |
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Thursday, July 08, 2021, 11:45, David Wang, South Hot-Cell, Standard Operation, TM4, Ta#62, TM4 Ta#62 leak check and lectrical check result at SHC and TCS.
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At SHC: HS line no leak . electrical check result is fine. At TCS: helium pressurized HS line to 70psi, 3 minutes. LD leak rate 0.0xE-9atm.cc/sec , no response. |
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Friday, July 30, 2021, 16:19, Carla Babcock, ITE, Repair, TM4, Ta#62, Electrical issues on Ta62
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TLDR: TBHT voltage too high and rising too quickly with TGHT current - voltage limited. TGHT power supply tripped breakers somehow. ITE:EL not outputting voltage.
A short between feedthroughs A and P developed at the end of the p2n run in this module, and was fixed by Chad prying apart the lines in the source tray with a long teflon bar. We did not take the containment box off to fix it properly for reasons of time and also potential damage to the containment box. This seemed to fix it and David measured around 13MOhms between A-P when the module was installed in ITE. To make sure we could recover if the short reappeared during the run, David did not connect the P/Q feedthrough to HV common on the module top as usual, but it was connected in the electrical room. I also unhooked the busbar from the coil power supply.
When trying to start the TGHT ramp up, it was discovered that ITE:TGHT had a fault in its readback circuit, which was showing negative voltages. Not sure how this happened, since the power supply was not used for the previous p2n run, maybe an HV spark? This supply was replaced with the spare (SN 1161-9894).
When TGHT and TBHT were able to be ramped up, we found that the tube heater voltage was increasing too much with the target current. Normally the rate of increase is about 0.0004 V per amp on TGHT. This time it was 0.004 V/A. This was causing the TBHT to be voltage limited, which I thought could be related to the AP short. So I re-wired it such that the P feedthrough (#7 in the electrical room) was disconnected from everything except it was tied to feedthrough A (#1) using a 100 Ohm resistor. This should prevent it from floating and also prevent current from going through. See documentation in the Target Records folder (https://documents.triumf.ca/docushare/dsweb/Get/Document-204373/July272021_ITETM4_electricalissues.pdf).
During the subsequent ramp up, the TGHT power supply tripped the breakers when it was at 500A, 8V. The cause of this is still uncertain, and the TBHT voltage issue persisted after the wiring change. In the interest of time we decided to stay conservative on the currents used and continue to run like this. It may also be possible that the copper block which is supposed to reference TBHT negative to HV common is not attached.
Finally ITE:EL is still not working. It shows a value on the front of the PSU but doesn't draw enough current and doesn't affect the beam. We are running without it and it will hopefully be fixed on the Aug. 4 maintenance day.
These electrical issues bear some resemblance to those with Ta61, but I don't think we ever determined the cause there. |
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Friday, September 17, 2021, 14:28, Travis Cave, Spent Target Vault, Standard Operation, , Ta#62, Spent Target Move
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The spent Ta#62 target along with 2A2M19 were placed in pail #256 and placed in spot 7A of the spent target vault. See attached PDF for vault details. |
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Thursday, November 05, 2020, 10:48, Travis Cave, ITE, Standard Operation, TM4, Ta#61, Module move
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TM#4 with Ta#61 has been moved from the south hot cell to the east target station. |
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Friday, January 08, 2021, 09:40, Travis Cave, South Hot-Cell, Standard Operation, TM4, Ta#61, Module move
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TM#4 with Ta#61 has been moved from the east target station to the south hot cell. |
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Wednesday, August 26, 2020, 09:52, David Wang, South Hot-Cell, Standard Operation, TM2, Ta#60, Ta#60 target electrical check and leak check at SHC.
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Electrical check and leak check at SHC. NO leak. electrical check ok. Before target on, A is short to PQ, RU is short to HS ( 60KV bias) as we measured before. |
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Thursday, August 27, 2020, 08:21, David Wang, Conditioning Station, Standard Operation, TM2, Ta#60, Helium pressure check on TM2 HS line at TCS.
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Helium pressurize on TM2 HS line at TCS is done. Base LR is 0.0X E-9 atm.cc/sec. 70 psi helium 3 minutes. No response. Also, The TCS vacuum pumping down over night is good. |
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Thursday, August 27, 2020, 09:42, Anders Mjos, Conditioning Station, Maintenance, TM2, Ta#60, Refilled TK2
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Refilled TCS:TK2 from 10 in to 22 in using the newly installed valve. |
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Friday, September 11, 2020, 11:25, Travis Cave, ITW, Standard Operation, TM2, Ta#60, Module move
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Both the west entrance module and TM#2 with Ta#60 have been moved back into ITW. |
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