TM4 with spent target TiC#9 was disconnected in 29-10-2024 and it is being moved from ITW to SHC.

TM2 with spent target TA#68 was disconnected  in ITE and is being moved to SHC. All water lines are purged for module storage.

 TM4 WITH UCx#46 was disconnected in 2025-01-02 in ITW. Forms attached.

 TM3 with spent target UCx#47 was disconnected in ITE and will be moved to SHC.

R. Kuramoto and A. Laxdal measured the distance from the 2A tunnel to the tank flange of ITE. The new fabricated beam pipe with bellows was used to gauge the distance to the tank flange; The flange face of the beam tube was butted up to the tank flange and the beam tube was marked at the plane of the wall. A metal rod was used to gauge the distance to the tank face using the same method.

From the inside of the tunnel wall:

- To tank flange: 45 5/16"

- To ITE vacuum tank face: 49"

See attached PDF.

The right hand manipulator has been repaired. It took 43 minutes and I received ~ 0.56 mSv

A  hydraulic leak was found on the manipulator  install and repair cart, upon further investigation the cause was a faulty cylinder. Once the cylinder was removed and disassembled the inner bore was found to be scored beyond repair. Another point of interest was that the rod was painted to the point that when retracted it compromised the rod seal causing the cylinder to leak. attached are photos outlining the issues. new cylinders are being sourced and will be installed upon arrival. We have found that there is interaction between the tops of the cylinders and the bed of the cart when fully retracted and compressed, this might require some modifications to ensure proper operation in the future.

 TM2 with TiC#6 was checked on SHC, see pic attached pls.

There is an air to vacuum leak on TM2 service cap side panel which we moved out during the TM2 wiring job. The CS pumps are stopped now. The CS will be vented soon. The seal on this panel has to been changed.

2016-06-30.  The o-ring seal on this panel(PNG1 and steerers)  is replaced and leak checked. No leak now.

 I leak checked TM2 at CS this afternoon which including air to vacuum check on service cap and helium pressure test on water lines. There is a small leak on water line R ,U (COIL1) during the helium pressure test.. Below 20 psi helium, there is no leak on it. But , once the helium pressure is increased over 20 psi, it showed up on Leak Detector. At 60 psi helium, the leak rate is 9.4xE-9 atm.cc/sec. For detail information, See attachment.  All other water lines and air to vacuum seals are good.

Chad and I leak checked the heat shield circuit after sic 27 target  installed. It took 20minutes  to pump down the circuit to the leak detector bottom scales. The leak detector is calibrated today,and all the vacuum lines and connections are leak checked by spraying helium. Chad sprayed helium to each vc fittings for 2 seconds. There is no any response on leak detector . The test repeated one time and the result is same. Chad flushed  helium around the target for 10 second .This time leak detector also have no respone.  The heat shield circuit is leak  tight at this stage . We will move TM4 to conditioning station and pressure helium test the circuit.

Chad and I leak checked the heat shield circuit after uc#3target installed. It took 5minutes to pump down the circuit to the leak detector bottom scales.   All the vacuum lines and connections are leak checked by spraying helium. Chad sprayed helium to each vcr fittings for 2 seconds. There is no any response on leak detector . The test repeated one time and the result is same. The heat shield circuit is leak tight at this stage . We will move TM4 to conditioning station and pressure helium test the circuit.

I did a leak check on conditioning station vacuum system today.The vacuum system had been roughed over night . This morning before the leak check,the convectron gauge  reading on emittance box is 20m torr which is reasonable. I hooked the  leak detector to system (without turbo pump  on) . The leak detector showed base LR 6.3xE-8 atm.cc/sec. At this base LR, I found 2 leaks up to low E -6range on that cross tube flange to small turbo pump, and the cross tube flange to vessel. I found some of the bolts on the flanges could be tightened more ½ to ¾ turn without difficulty. I checked all the fasteners on the box, cross tube, and turbo pump, tightened some of them. By doing it, the base leak rate dropped to 3.0x E-8 atm,cc/sec, base pressure still 0.0XE-4 torr. I sprayed helium again, the response I found before now disappeared. I waited for about 1hour, and let the leak detector base leak rate dropped to 1.3 xE-8 atm.cc/sec, and base pressure still at 0.0xE-4 torr. At the same time, i only use leak detector as back up pump for whole sysytem and shut off the valve to the scroll pump.By doing this , the leak detector is much stable on the base leak rate. With the help of Bevan, i sprayed the helium to all the vacuum  equipments again.This time,no any tiny response has been found on leak detector.The leak rate stayed at 1.2x E-8atm.cc/sec, and no change on pressure also. I checked helium bubble several times during the spray. The conditioning station vacuum system is leak tight.

Chad and I did a leak check on TM1 Nb5 target heat shield circuit. The leak detector was connected to heat shield circuit.The pumping down  of the  circuit is very smooth.Base leak rate is 0.0xE-9atm.cc/sec,and the base pressure is 0.0xE-4 torr. Chad checked the helium flow downstairs .He sprayed helium to both up and down VCR joints 2seconds each time. There is no any response on leak detector(30 seconds waiting time). Both joints did the same test twice, no response . Finally, he flushed helium around the target for 10 seconds,and i didnt see any response on leak detector either.The heat shield circuit on TM1 Nb5 target is leak tight at this stage.

Chad and I did a leak check on heat shield circuit after target is installed on TM1.The leak detector pumping down is smooth. The base leak rate is 0.0xE-9 atm.cc/sec. The base pressure is 0.0xE-4torr. Chad checked helium flow downstairs and sprayed helium to each joints for 2 seconds.The first joints is good and there is no any response on leak detector.we double checked it again and got the same result. On the second joint, Chad sprayed helium 2second. After 15 second of spraying,the leak detector got a response which climbed to 3.2xE-8 atm.cc/sec max,and back to 2.5 XE-8 atm.cc/sec. Chad tried to tighten the fitting. During his tight, the leak rate response to 7.5x E-8 atm.cc/sec momentarily. After the tightening ,the leak rate back to 0.0x E-9atm.cc/sec whic is the base.So we sprayed the helium to the joint again.This time ,there is no any response on leak detector. We checked this joint  again and got the same result which is no response. Finally, Chad flush the helium around the target for 10 second ,and during 45 sec observation time there is no any response on leak detector. I would say the heat shield circuit is leak tight so far. I will do a helium pressure test on it once the TM1 is moved the CS.

Chad and i did a leak check on TM1 heat shield circuit with new Nb#7 target installed. It took about 5 mins pump down the circuit to leak rate 0.0x E-9atm.cc/sec and 0.0x E-4 torr on leak detector.

All vacuum lines and joints which connected to the leak detector had been helium sprayed and they are leak  tight. Chad sprayed helium on each VCR joints for 2 seconds every time. During 45sec waiting time, there is no any response on leak detector. Chad repeated same test again for double checking and we got same result. Chad finally flushed the helium around the target heat shield for 10 seconds.we waited for 45minute and found no response on the leak detector. The heat shield circuit is leak tight at this stage. I will do a helium pressure test on this circuit when TM1 is in CS and under vacuum.

Chad and I leak checked coil line(R,U) on TM2 at SHC yesterday. The leak detector was pumped down to 0.0Xe-9 atm.cc/sec before the check. Chad sprayed helium on the soldering joints connecting the cooling copper lines to the small holding blocks for the coil terminal(R,U).  After sprayed helium 2 seconds, I saw the leak rate on LD started to climbed up. The highest leak rate is 4.0xE-8 atm.cc/sec. It is a very positive response. We waited the leak detector pumped back to 0.0xE-9am.cc/sec, and tested again on the same joints. The result is same. Chad also sprayed helium on the R,U water blocks to check the C-seal. I saw a delayed tiny response on LD ( from 0.0 to 1.3xE-9atm.cc/sec). We think this tiny response is caused by the helium drifting to the leak soldering joint, but not a real C seal leak.

Chad and I leak checked the coil 1 circuit(R,U) after rebuilt coil line is installed on TM2 source tray. The pumping down on the circuit is very quick and smooth. The LD base lake rate 0.0xE-9 atm.cc/sec. Base pressure0.0xE-4 torr.

Chad sprayed lots helium on the R( coil 1+)and U(coil 1 -) water blocks. During  1 minute waiting time, there is no any response on LD. The R and U water blocks and C-seals are leak tight.

2018-02-27: Anders and I finished leak check on ITE primary and second vacuum vessel seals. LD connected to ITE BV2 valves between. LD, Base Leak rate 1.2 xE-9atm.cc/sec, base pressure 0.0XE-4torr. There is a leak has been found on TM4 service cap KF25 blank off. The o-ring on the blank off will be changed later. It is an easy fix . Other seals are good. The big T tank seal on secondary vessel is leak checked as well. It is still fine.  Helium pressure on TM4 water lines will be fulfilled at TCS to save dose.

2018-02-28 Leak checked ITW today, LD connected to ITW BV2 valves between LD base LR0.0XE-9 atm.cc/sec. base pressure 0.0Xe-4torr. There is leak has been found on exit module 1 service cap  on  topcover plate   o-ring. The leak is located on the south side of east edge on exit 1. This is the side module 2 is close beside. The leak rate is up to middle of E-8atm.cc/sec  range with 1-2 second helium spray. The leak and leak position are double checked and confirmed.  To completely fix this leak, the o-ring for top cover plate need to be replaced on service cap.It will be a major shut down job.  The  leak is close to ITW TP3 so it is less affect on beam line elevation vacuum.  Vacuum group experts will be consulted to see if we could leave it to next year shutdown.  Other seals are good including big T-tank seal on secondary vessel. TM2 source tray will be replaced this yea rso no helium pressure test on water lines is needed at this moment.

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.