Tm3 has been moved to SHC from silo. the move is smooth.

Tm3 has been moved  from SHC to silo. The move is smooth.

On April 2, 2024 the wrist on the SE manipulator of the SHC (Serial # 7986) was swapped with a rebuild unit originally from SW position (serial # 8106). The "new" wrist was a wrist + tong assembled unit with the tong cable being routed if-front of the spacer A-14118 rather then behind as in all previous replacements (see attached pictures). This change was a result of a discussion with Central Research's senior repair technician who informed us that the original routing was incorrect from the factory. This can be seen when inspecting unit we have on-site that are still in the original configuration from the factory as about half are routed one way and half the other.

Tm3 was moved from silo to SHC yesterday. the move is smooth.

TM3 new source tray was transferred into SHC on this Tuesday. one hook arm of transfer jig is very close to optic tray tube when engaging the jig on transfer frame. tube side hook arm should go east side a little bit further to avoid the tube.  Also the HS tube top lines to  transfer frame beam bottom distance needs to be watched closely when hooking on the frame.Help from HC window is necessary. By watching on this details, Source tray are successfully moved into SHC with crane controlled locally in TH.Transfer frame was retrieved back to TH. It was cleaned, bagged and stored in TH.

TM3 water lines helium spray leak check at SHC is done. No leak has been found on all lines. seeattachment

Wires were pulled in TM3 and service cap was closed up again:

Einzel lens wire (30kV kapton), routed in the pumping duct and attached with #10 ring tongue to EZL feedthrough in service cap

4 steerer wires, routed in th pumping duct and attached with push on connectors to the 4 SHV feedthroughs on the module side panel. Coax grounding sheath is cut back by about 3cm.

Multipin cable bundle #1, routed through the left cable tube in the service tray then along the heat shield water lines (with PEEK zip ties) to feedthrough A.

Multipin cable bundle #2, routed through the right cable tube in the service tray then along the heat shield water lines (with PEEK zip ties) to feedthrough B. This bundle contains the EE wire as well, which was branched out after exiting the service tray and routed along the gas lines to the EE feedthough. It was attached with a smaller (size?) ring tongue to the EE feedthrough. Do not use this wire again, very fragile. Use the Accuglass 30kV wire instead.

The multipin wires touch the back of the water blocks in the source tray (same as in MT2/4, so far no issues with that) and they also touch the COIL lines in the service cap.

The EZL and steerer wires are routed along the floor of the service cap.

Due to the difficulty of the installation, there is no metal braid over the multipin bundles in the service cap.

Photos here : https://triumfoffice365-my.sharepoint.com/:f:/g/personal/cbabcock_triumf_ca/EslWNUST-UJKh1s8jjxWG6EBpLQEnWxgV4v-NvR4ZJjlOQ?e=Mw5vvI

TM4 has been moved from SMP to SHC. Adam and I did the move. the move is smooth.

 David Wang made E/L checking before module moving to ITW. read attachment pls.

Travis and I moved TM3 from TCS to SHC this afternoon. The move is smooth.

TM3 with UCx#44 electrical check and leak check are good. see attachment.

HS line 70 psi helium pressure test at TCS: no leak at 0.0xe-9 torr.

After new containment box installation on TM3, Chad and I did a helium spray leak check on two VCR fittings on front side water lines. they are leak free.

Helium pressurize window water line to 70 psi for 3minutes. No response on leak detector which is 0.0xe-9 atm.cc/sec.

TM4 has been moved from SHC to TCS. the move is smooth.

electrical check and leak check were done on TM4 UCx#45 target at SHC.  everything is ok. See attachment

helium pressure test on TM4 HS line at TCS is done.   No leak.

On Wednesday, May 22, 2024 UCx#45 was installed on TM4 in the SHC. Installation was normal other then minor issue with the multipin connector drive screw not engaging and/or driving properly. This was remedied by loosening the left guide bolt slightly (1/2 turn). After loosening the multipin drove in and seated correctly (verified by camera). High current fasteners torqued to 130 in lbs.

On May 30 Aaron, Chad and I removed the empty LP FEBIAD target from the SHC into the anteroom to attempt to find out the source of the cathode short observed online. The behaviour online was that a connection of several hundred ohms was preventing the cathode from being biased. The resistance was still enough to allow us to run in anode mode, which is what we did. I am not sure where the cathode short came from but there was significant sparking on this module when ops conditioned it (destroyed the gmov of the COIL power supply and the electronics for anode/cathode switching) and we have seen this cause cathode shorts before. The shorted behaviour did not go away when the target was cooled down, so I assume it was permanent damage to one of the insulators. This would be either the support insulator, the trident insulator, the gas line insulator or one of the tube retainer insulators.

Since the target didn't see protons, we decided to take it out of the hot cell and disassemble it to find which insulator was broken. Unfortunately, it appeared totally fine outside of the hot cell, no shorts could be found. We disassembled it anyway to look for issues but all we saw was a heat mark on the copper plates covering the coil, underneat the target (see attachment). We even shook the target quite a bit, and didn't produce a short.

Maybe there was a trace created on one insulator by the sparking, which oxidized when exposed to air and became insulating again? We didn't see anything obvious on the insulators, but I'm not sure if we would expect to.

No conclusions from this work.

TM3 UCx#44 after operation electrical check at SHC . see attachment.

Carla: Looks like the short on the cathode observed while trying to operate the FEBIAD in cathode-bias mode is still there. Will do investigations in the hot cell during disassembly.

Tm3 electrical check without target is done. Everything is good including 2 x 5 pin connectors( all OL at 250 V to 60 KV and each other)  see attachment.

TM3 has been moved  from SHC to TCS.The move is smooth.

Tm3 electrical check with SiC#46 target  and HS line helium spray check at SHC. were done. everything is good. see attachment.