TM2 Nb#10 has been connect at TCS. TCS water system and vacuum system have been started. Everything looks ok so far. TCS Faraday cage is secured for TM2 conditioning at TCS.

PIE on TiC#6 was done in the NHC. The target assembly looked brand new when we took it out, no heating spots or deposits (pictures on docushare). Online we measured a 400kOhm connection between TGHT-TBHT-COIL to HV common (TGHT and COIL shorted in TM2 service tray) and anode was unstable above ~300V. After the module move and before the target removal David found TGHT-TBHT-COIL was a dead short to HV common and the anode was at 39kOhms to HV common.

1. Wanted to see if the TGHT-TBHT-COIL short was on the COIL. Measured with ohmmeter the COIL lines to HS and got about 700Ohms. But with the target lying down the COIL lines drop and touch the heat shield so to do this measurement Chad had to lift the lines, which could cause them to touch something else. So not sure how reliable this measurement was. It jumped around a lot, saw 0L occasionally.

2. Measured both target legs and tantalum gas line to HS, got about 5kOhms repeatedly using the ohmmeter.

3. Meggered across the gas line insulator to the gas line going into the target and got open circuit at 250V, so the gas line wasn't coated.

4. Target container looked vaguely red in the areas where the target material was, otherwise still no deposits on the inside. The container was not overly crystalized as seen on the legs and end caps.

5. Some sparking marks on the EE and some slightly asymmetric deposits

Continuing Aug. 22 2023:

6. Found what looks like a hole in the insulation on the COIL, maybe the cause of our short? Found a corresponding line mark on the copper plates that hold the coil down but not sure if it is related. Pics on docushare.

7. Grid looks perfectly new. Where was that current going?

8. Copper plates that hold coil were loose and bolts that hold coil in just fell out as well.

9. What can be seen of the anode wire looks good.

 TM2 with new target Nb#10 was moved to ITW from TCS and re-connected in pit. TPs are running at their full speed. 

 TM2 with target Nb#10 was disconnected in ITW yesterday for beam production issue investigation.

 TM2 with new target Nb#11 has been E/L checked sitting on NHC.

 TM2 with new target Nb#11 replaced has been electric checked one more time in ITW.

 Module was connected yesterday and all turbo pumps are running at their top speed. 

 TM2 with target Nb#11 has been disconneted in ITW. The HS line was purged with Nitrogen in station. 

 An electric checked right after TM2 was moved from ITW. 

 TM2 with new target Ta#66 had an electrical check and leak check on SHC. 

 TM2 with new target Ta#66 was connected in ITW. 

TM2 has been disconnected in ITW. All water lines are nitrogen purged. Filled 60 psi argon to all Tm2 water lines for module storage in winter shut down.

ITW primary and secondary vacuum vessel leak check and TM2 water lines helium pressure test are done today. No major concern. see attachment for small air to vacuum leak we found.  TM2 water lines helium pressure test is fine.   HS and window line leak rate are 1.4Xe-8 atm.cc/sec. all other water lines are below 3.0XE-9atm.cc/sec.

TM2 was moved from ITW to the South Hot Cell with Ta#66 target.

TM2 was moved with no target attached from the South Hot Cell to a silo.

Ta#66 post operation electrical check was done at SHC this Monday. See attachment.

Broken TM2:TP2 has been replaced otday by a new TV-1001 nav pump supplied by vacuum group. replaced pump seris number:201281. new pump series number:IT23431008. TPs replacement history sheet will be updated by Frank. I will put comment on this e fault and let operator to close it.

TM2 was moved from silo to TCS yesterday morning. The move is smooth.    TCS vacuum system was started after. TCS and TM2 pumping down is ok so far.

TM2 is moved from TCS to silo this morning. The move is smooth.

  couple of E-8 to low E-7 atm.cc/sec leak were found on TM2 service cap top air to vacuum  o rings.  Replaced these leak o ring seals including o ring on IG1 and steerer service panel,o rings on MSP, EE, D blue nylon and copper feed through, and o ring on a round blank off beside MSP terminal on second row. 

2024-july-03 update: TM2 was leak checked again at TCS. no air to vacuum leak on module top. i helium pressure tested(60psi) all water cooling lines (except HS) . They are leak free.