Logbooks Lab Maintenance Evaporator_1 Evaporator_2 Laser cutter Target Production Test-Stand RH-ISAC RH-Cyclotron RH-Meson Hall RH-Beamlines RH-ARIEL
  RH-ISAC, Page 75 of 138  Not logged in ELOG logo
Entry  Wednesday, February 14, 2018, 10:06, Anders Mjos, ITW, Maintenance, TM2, , Replaced parker couplings on Window cooling line 

By Anders & David. Couplings will be taken apart for inspection.

Entry  Wednesday, March 02, 2022, 10:51, David Wang, ITE/ITW, Standard Operation, , , Replaced old turbopump and 2A3M20 wire scanner are transferred to cyclotron tunnel.  

Replaced 9 old turbo pumps from ITE/ ITW and  one 2A3M20 wire scanner from ITE are transferred to cyclotron tunnel for storage. It is TH RAD waste cleanup task in winter shut down.

Entry  Thursday, August 23, 2012, 07:34, David Wang, ITW, Repair, , , Replaced broken air lines on ITW HARP5B cylinder. 

Prob guys replaced broken air lines on ITW HARP 5B Cylinder.Several shielding blocks had been moved out to make the cylinder accessible. After the replacement,the HARP5B works fine.All shield blocks had been moved back to original position. The job is done.

Entry  Friday, June 14, 2024, 16:04, Carla Babcock, ITW, Repair, TM4, UC#45, Replaced and reinstalled electronics in ITW cage 

ITW has been behaving badly at higher voltages recently, even without protons on. I conditioned it up to 50kV with heaters off in the TCS and it was fine. But when I tried to do the same with heaters on in the station, it was quite sparky and it kept tripping the TGHT/TBHT. I went to 49kV where it was unstable, then lowered to 48kV where it looked fine for 30mins. But even operating at 40kV, it tripped the heaters several times. The TBHT voltage came back lower than before on the last trip, so I am getting worried about it.

I decided to make sure all the electronic spark protection was ok in the faraday cage. There is a resistor/gmov combination across the terminals of each TGHT/TBHT in which Tomislav replaced the gmovs for me because his tester did not work at those low voltages, so we couldnt see if they were broken. The electronics diagram called for 18V gmovs, the replacements are 22V because that's all we have.

We also tested and re-installed the capacitor-gdt-resistor combinations that John installed last year from TGHT/TBHT bubars to HV common. I originally removed them because we couldn't bias a FEBIAD with them on - this still has to be investigated. The measured values are 0.148uF, 90kOhms and a breakdown voltage on the gdt of 410-450V.

Hopefully this prevents sparking the power supplies off.

 

Sunday, June 16, 2024, 07:03 : power supplies have not tripped off since electronics repair. See data/TM4sparkingbehaviour_June152024.dat for sparking frequency over ~10hrs of protons (5-14uA). >14 sparks during this time (14 captured by PLC when voltage dropped, many more current peaks).

Entry  Thursday, January 10, 2013, 10:40, David Wang, ITW, Maintenance, , , Replaced all high active water system magnetic pedal wheels in ITW and ITE. 

I replaced all high active water system magnetic pedal wheels in ITW and ITE. This is a preventive maintenance job we planned for this winter shut down.

Entry  Tuesday, February 26, 2013, 13:53, David Wang, Conditioning Station, Repair, TM4, , Replaced TM4 TP1 

Bevan and I replaced TM4 TP1 today at conditioning station .The pump will be started this week when I do ITE and TM4 leak check .

Entry  Thursday, April 26, 2012, 13:01, David Wang, ITE, Repair, TM4, , Replaced TM4 EE water flow wheel in ITE. 

Due to weak magnetic field on TM4 EE water flow wheel, we have two times intermittent water signal on this circuit this morning. I replaced the old wheel with a new one in ITE. I checked the signal frequency and strength.It looks fine now.

Entry  Wednesday, April 01, 2015, 13:08, David Wang, ITE, Standard Operation, TM4, , Replaced ITE tank to module 42X0.275 o-ring 001.JPG002.JPG004.JPG005.JPG006.JPG

I replaced ITE tank to module 42 ID X 0.275 o-ring. The o-ring is changed once a year before the first beam time. The flanges was cleaned and the new o-ring was installed. It works fine.

Entry  Thursday, June 03, 2021, 08:19, David Wang, ITE, Repair, TM4, UCX33, Replaced ITE TP4  

Replaced  ITE TP4 due to failure start. The new pump works fine.

Entry  Thursday, October 04, 2012, 11:06, David Wang, Conditioning Station, Repair, , , Replace conditioning station scroll pump in target hall 

Grant and I replaced the conditioning station broken  srcoll pump with a refurbished scroll pump which is supplied by vacuum group. The replaced pump is bagged and waiting for RPG further survey in target hall . The target hall is survey after the job, and everything is fine.

Entry  Tuesday, February 15, 2022, 11:18, Frank Song, Cooling, Repair, , , Replace 2 leak valves on high active water system v10_v11.jpgv10.jpgv11.jpg

 The valves #V10 & V11 beside high active water pumps were replaced in Target Hall, pics attached.

 

Entry  Wednesday, May 15, 2013, 16:51, Bevan Moss, Conditioning Station, Standard Operation, TM3, No Source Tray, Repeat of HV Test 150502013_TM3_No_Source_Tray.xlsx

 The HV test completed on Monday was repeated today over a much longer time period. By taking longer there was slightly less sparking but once again a maximum voltage of ~44kV was achieved. The  resistivity of the water was much higher during this run so the leakage current was less but still in the >100 uA range. The spark that occurred during the ramp up to the maximum voltage caused the "water resistivity" limit to trip. This was a feed back through the control not the actual water changing as it recovered instantaneously. 

Entry  Friday, July 29, 2022, 12:05, Carla Babcock, North Hot-Cell, Repair, TM2, UCx#38, Repair of UCx#38 EE short in ante room 20220726_111649.jpg20220726_111641.jpg

UCx#38 developed a short between the plasma electrode and the extraction electrode about 30mins after reaching full temperature in the conditioning station. The decision was made to bring it into the anteroom and try to clean it there.

To do this, it was uninstalled, the parasitic attachments were removed and it was brought into the ante room.

I removed the EE and the PE, and cleaned quite a lot of material from them both with methanol. I think put the ionizer foil bar down the ionizer to help dislodge any material there, and I also turned the target over and tapped gently to get any material out. The first two times some flakes came out, the third time nothing came out. I then reinstalled the electrodes using the EE alignment tool (not sure how successfully, didn't push it into the ionizer too much because I was worried about catching the Rh foil).

The taret was meggered at 500V then reinstalled and electrical checks were done. Everything looks back to normal. Conditioning in ITW was successful.

Entry  Wednesday, September 18, 2019, 14:28, Travis Cave, Spent Target Vault, Standard Operation, , , Repacking of the targets. 

 Three of the five targets in the mini storage have been repackaged into the stronger pail.

Entry  Thursday, September 19, 2019, 10:11, Travis Cave, Spent Target Vault, Standard Operation, , , Repacking of the targets. 

 Another target in the mini storage has been repackaged into the new pails. With one remaining to do which will be done on Monday.

Entry  Monday, September 23, 2019, 13:21, Travis Cave, Spent Target Vault, Standard Operation, , , Repacking of the targets. Target_Index_2019-09-23_Mini_Vault.pdf

 All targets in the mini vault have been repackaged and are now ready to be loaded into F-308s. All the target pails have new numbers see attached sheet for details.

Entry  Friday, October 30, 2020, 09:02, Travis Cave, Spent Target Vault, Standard Operation, , Ta#48,51,54 SiC#35, and UC#25, Repacking of the targets. Target_Index_2020-10-30.pdf

 Targets Ta#48,51,54 SiC#35, and UC#25 were repacked and placed in the mini vault. In the following order back to front. SiC#35 (240), Ta#54(241), UC#25(244), Ta#48(243), Ta#51(242).

Also during this repacking Ta#60 was also placed in the Spent Target Vault in spot 7B in pail# 239.

Entry  Wednesday, November 17, 2021, 11:42, Travis Cave, Spent Target Vault, Standard Operation, , Ta#57, Repacking of the targets. Target_Index_2021-11-17.pdfTarget_Index_2021-11-17_mini_vault.pdf

 Ta#57 was repacked and placed in the mini vault. The pail was changed from #174 to #263. See attached PDF for more details.

Entry  Friday, October 29, 2021, 12:27, Travis Cave, Spent Target Vault, Standard Operation, , Ta#56, Repacking of the target. Target_Index_2021-10-29.pdfTarget_Index_2021-10-29_mini_vault.pdf

 Ta#56 in pail #169 was repacked and placed into #269 and was placed in the mini vault at the back. It was 3.86mSv/hr upon removal from the NHC. See attached files for details.

Entry  Monday, November 15, 2021, 12:00, Travis Cave, Spent Target Vault, Standard Operation, , Ta#53, Repacking of the target. Target_Index_2021-11-15.pdfTarget_Index_2021-11-15_mini_vault.pdf

 Ta#53 was repacked and placed in the mini vault it was changed from pail#164 to pail#262. See attached PDF for further details.

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