TM4 with C#4 was disconnected in ITE

 TM2 with UCx#40 is connected in ITW.

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.

Helium 70 psi. tested 5minutes at base leak rate 0.9 xE09 atm.cc/sec on HS line.  No leak.

 The spent UC#39 target (pail #276) was removed from the north hot cell and place in the spent target vault (spot 4B) it was 14.4 mSv/hr when removed from the north hot cell. See attached PDF for further details. 

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

 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.

 TM2 with spent target UCx#39 was disconnected in ITW then moved to NHC.

During the last ITE run with the SiC#44 target, the ITE:TBHT controls card was fried twice. The first time we put in our spare, and the second time we just continued to run without controls readback. For the C#4 run starting Oct. 19, we used the conditioning station supply. As soon as one of the other supplies is fixed, we will install it in the conditioning station. The equipment list (https://triumfoffice365-my.sharepoint.com/:x:/g/personal/cbabcock_triumf_ca/EQPffP4p1P9JqEDWIHGRPfsBVDSQjMCv-M8ZNg4ngkyGHw?e=fnLVYe) tracks these movements.

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.

17-Oct-2022 Comment by David Wang: On OCt 14th, Replaced a flexible hose on MP1S pump exhaust port,but did not solve the issue. High frequency vibration was sensed by hand on MP1S pump inlet and outlet ports. Pump height and position in pit are adjusted slightly in pit to reduce vibration. After, ITHCG2 and ITW CG4SA got a huge improvement in past 3 days. All back up line pressure are stabilized at normal operation status. Still, close watching on this issue is needed to ensure the present status is stabilized in long term.

The issue was returned after shielding block installation Monday morning at 8:30am. Investigated further,  I temporarily installed a turbopump used cooling fan on MP1s to improve pump heat dissipation. And a room fan is put outside on shielding blocks opening hole to increase air circulation into pit. Since then,  everything is perfect. All secondary turbo pumps current draw is around 0.5 to 0.6A which is the best.  I guess that short duo 10 pump life we observed in past could be related to high pump operation temperature in pit as well. We may increase the pump life if air circulation around the pump could be improved. A permanent solution is needed for it.

 Spent target move done. The SiC#44 was moved from the north hot cell to the spent target vault. It was placed in pail#275 and placed in spot#4A. It was 42.6mSv/hr when removed from the north hot cell. See attached PDF for further details about the vault.

Please note we will only have two free spots in the vault at the start of the running period after the winter shutdown 2023.

 TM4 with Target C#4 was connected in ITE.

A modification was made to integrate the hot cell's lift table into the E-stop circuit. See work permit I2022-10-07-1

The E-stop mounted on the right side of the small enclosure adjacent to the operator station will now serve to stop the lift table's up and down motion, as well as the turntables up/down and CW/CCW motions. Functionality was checked by B. Webster (electrical services) and A. Newsome.

Note: it is recommended next time there is a hot cell entry to inspect whether or not the limit switch specified in the schematic is actually installed. The schematic should be updated to match the drawing.

Redlined electrical drawing photo attached to this e-log, and the paper drawing is left inside the lift table's control box. The schematic will be revised based on the redline updates, likes as part of work request #6342 (to integrate this drawing into the turntable controls drawing package).

TM4 HS line helium pressure test is done. 70psi helium pressure@ 3XE-8 atm.cc/sec . No leak.

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

 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)

A fully built steerer sub assembly ITA2826 revision E was boxed and sealed and put on rack storage in ISAC B2 South Hot Cell area. It is contained in a blue bin and green tag. 

It is advised if this assembly is used, it should be inspected for damage before using in a source tray.

 TM4 with SiC@44 was disconnected in ITE.

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.