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  RH-ISAC, Page 60 of 138  Not logged in ELOG logo
ID Date Author Categorydown Type Module Target/Number Subject
  2330   Monday, June 20, 2022, 11:00 Frank SongNorth Hot-CellRepairTM2SiC#42Failed Sic#42 electrical measurement at NHC

 An electrical check was done at NHC, see attachment pls.

  2332   Tuesday, June 21, 2022, 15:36 Matthew GareauNorth Hot-CellRepairTM2SiC#42, SiC#43multipin guide pin issues

 While removing the SiC#42 it became apparent that the multipin guide pin had become loose again and was not allowing the target to dismount from the module.

The multipin shoulder bolts were removed and then the multipin was able to be pried off.

However the NHC manipulator were not able to reach the guide pin to remove it, which would be required before the SiC#43 could be installed.

The target module was then moved to the SHC where the guide pin could be removed and the installation of SiC#43 took place, along with the transfer of the parasitic attachment onto the SiC#43.

This problem seems to suggest that the multipin could use some redesign to ensure smoother target exchanges.

  2335   Tuesday, June 21, 2022, 18:43 Frank SongNorth Hot-CellStandard OperationTM4UCx#37electrical check

 A p2n target in TM4 was electrical measured on NHC. see attachment pls.

  2338   Thursday, June 23, 2022, 07:11 Frank SongNorth Hot-CellStandard OperationTM4Ta#64electrical check

 New Target Ta#64 was installed on TM4. Electrical measurement result is good. c/w attachment.

  2347   Tuesday, July 19, 2022, 11:53 Frank SongNorth Hot-CellStandard OperationTM2SiC#43 Febiadelectrical check

 A electrical check was done at NHC, see the pic attached with please.

  2348   Thursday, July 21, 2022, 10:24 Frank SongNorth Hot-CellStandard OperationTM2UCx#38electrical check

 A electrical check was done for TM2 with UCx#38

  2349   Tuesday, July 26, 2022, 13:50 Frank SongNorth Hot-CellStandard OperationTM2UCx#38TM2 electrical check with Target and No external Connections

 A standard electrical check was done for TM2 after the short issue be fixed.

  2352   Friday, July 29, 2022, 12:05 Carla BabcockNorth Hot-CellRepairTM2UCx#38Repair of UCx#38 EE short in ante room

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.

  2354   Tuesday, August 09, 2022, 12:23 Frank SongNorth Hot-CellStandard OperationTM4Ta #64Electrical Check for TM4 with Ta#64 after beam at NHC

 An electrical check made at NHC right after TM4 moving from ITE.

  2355   Wednesday, August 10, 2022, 08:10 Frank SongNorth Hot-CellStandard OperationTM4Sic#44electrical and leak check

 TM4 with Sic#44 installed and had an electrical / leak check at NHC. 

  2362   Tuesday, September 06, 2022, 14:05 Frank SongNorth Hot-CellStandard OperationTM2UCx#38electrical check after disconnection

 An electrical was done on the NHC for TM2 with spent Target UCx#38 on

  2363   Thursday, September 08, 2022, 07:20 Frank SongNorth Hot-CellStandard OperationTM2UCx#39electrical check

 An electrical check was done on NHC yesterday.

  2368   Wednesday, September 28, 2022, 12:58 Matthew GareauNorth Hot-CellRepair  Chad repaired the right operator side manipulator

On 26/Sept/2022

Chad disassembled the right operator side manipulator, and noticed that gears in the handle were quite tight especially when compared to the left operator side manipulator. 

Once a dry grease was added, and the handle reassembled all seemed to be in working order.

There was noticeable wear on a shaft and Chad has suggested to order some spare parts for the wrist and handle. 

  2369   Wednesday, September 28, 2022, 13:15 Matthew GareauNorth Hot-CellMaintenance  topped up the NHC window oil through the oil expansion tank

Myself and Maico were able to top up the NHC window oil.

The oil was filled through the expansion tank

- the Nitrogen line closed and the Nitrogen pressure valve was disconnected to ensure that no oil would go in to them.

- the pressure relief valve was disconnected to act as an air bleed line while we filled the oil

- with a funnel we slowly added the oil until the oil level could be read, showing about half full

- about 1.5 liters of oil were added

- once filled the Nitrogen line was reattached and the pressure was returned to recommended level 

- the remaining oil was returned the RH shop

Now the oil level will be monitored, which will help identify if there is any leak in the system.

  2372   Monday, October 03, 2022, 14:58 Matthew GareauNorth Hot-CellRepairTM4SiC#43 and C#4Loose multipin guide pin

 Today while I was removing the SiC#43 it was noticed that the multipin guide pin was loose.

This made it difficult to remove the target, and the multipin shoulder bolts removal was required.

With the loose pin it was not possible to attach the multipin for the target C#4.

Chad was able to tighten the multipin guide pin enough, however it became obvious that the pin could not be removed when it was attempted.

With the pin tightened, the target C#4 was installed and all checks were good.

It was recommend that once the C#4 target is removed the TM4 will need some repair to remove the multipin guide pin. 

 

Chad - Also it was noted that the guide pin (ITA6453) in question showed signs of plating or heat (see pictures I've added)

  2373   Tuesday, October 04, 2022, 07:19 Frank SongNorth Hot-CellStandard OperationTM4C#4electrical check

 an electrical was done for TM4 with target C#4 installed on NHC.

  2379   Wednesday, October 19, 2022, 12:00 Carla BabcockNorth Hot-CellStandard OperationTM4SiC#44PIE on SiC#44

Conducted PIE on SiC#44, which failed online. It had a cathode short, a target short and an anode short by the time we called the experiment off. In the post irradiation examination, two clear marks where the target legs touched the heat shield were found (see attachments 1 and 2). No marks were found to indicate where the cathode short would have been. The fibreglass sheath covering the anode wire where it passes over top of the coil was destroyed, must have been a result of sparking (see attachment 3). No other issues noticed, grid looked fine, though close inspection is difficult.

  2382   Tuesday, November 01, 2022, 12:40 Frank SongNorth Hot-CellStandard OperationTM2UCx#39electrical check

 TM2 with spent target UCx#39 had an electric check in NHC.

After UCx 39# target was removed out., I did electrical check on TM2.   @500 V B to C is 5M ohm. all Others between are above 25Mohm. HV to Chasis is 650Mohm.  A to P is still short.

  2383   Wednesday, November 02, 2022, 11:11 Frank SongNorth Hot-CellStandard OperationTM2UCx#40electrical check

an electrical check was done on NHC, TM2 with new target UCx40 is ready moving to TCS.

  2386   Thursday, November 03, 2022, 16:41 Carla BabcockNorth Hot-CellStandard Operation UCx#39Post irradiation inspection UCx#39

Did the PIE on UCx#39-IGLIS on Thursday Nov. 2 2022, couple pictures uploaded to docushare. Did not remove the target, just the heat shield cover.

Final electrical check on the module showed a dead short from TGHT/TBHT to HV common, which we did not see online. Seems like it must have occurred after ramp down? It persisted on the target after we removed it from the module. We couldn't find any obvious contact points, because it seems it did not happen while current was running in the target. Possible locations are the bottom support leg for the TBHT and the top of the right side target leg, though it was difficult to confirm with the camera.

Otherwise the only thing to note was a blacker-than-usual spot on the inside of the Cu heat shield, downstream in the proton direction.

 

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