TM#2 with ZrC#7 has been moved from the conditioning station  to the west target station.

During last run， ITW dump circuit had a water leak on an adaptor below the pressure gauge. The top tank flange, slot, and O-ring were water contaminated by the leak. I removed the old o- ring, cleaned up the flange and o-ring slot, and put a new o-ring into the flange. Some  pictures will be attached in this mail later.

TM2 has been connected in ITW. During the connection, Anders and I  found the TM2  high current cables used in ITE and CS are short in ITW.  Anders and Grant found the original TM2 ITE high current cables in target hall. We replaced them. They works fine. But, a little bit longer on cable length would be easy to connect them. All other connections and HV cover in ITW work for the TM2 so far.

https://documents.triumf.ca/docushare/dsweb/View/Collection-15323

Maico and Dan moved 5 shielding blocks from ITE to ITW. The ITW is configured to take proton beam.

The corelation betwenn the local value on the gauge controllers and the read back valiues in EPICS was compared. Data can be found in a previous  e-log

Dan and I disconnected TM2 in ITW this morning.

Bill and I remotely removed TM2 from ITW to SHC. The move is smooth.

I did an electrical check on TM2 with ZrC #7 on it. The EE is short to 60KV bias. See attachment

ZrC#7 has been removed from TM2. Everything looks good.

I installed a set of new high current cables for TM2 Febiad run. The top of TM2  is configured to Febiad mode. See attachments

I did a TM2 no target electrical check at SHC this morning. A to RU at 500v  is 250K which is low.   anode- x pin is dead short to 60kv bias. RU is dead short to 60kv bias( as before).   see attachment

The TM2 containment box was removed this morning for installation of the 9 pin connector...connection.

The 9 pin connector copper tube connection was made and Anders advised on routing of the cable to the banana plug water block connection.

Short was diagnosed (short disappeared when water block was pushed slightly towards center of module) and thicker Ultem spacer installed and tested again. All good.

SiC#32 has been installed on TM2. High current fasteners torqued to 130 in lbs.

 An electrical check was completed by Travis C and Anders M. Note ~250 kOhm between Target and 60 kV common. Leak check was done by Dan M and Chad F on HS and Window circuits. No leaks found

TM#2 with SiC#32 has been moved from the south hot cell to the west target station.

The failed extraction electrode was inspected in the hot cell this morning by Anders and Chad. The following electrical measurements were taken

• EE on target assembly as recieved from TM after online operation. 14 Ohm
• EE removed from target assembly and placed on conductive flat surface. ~1 G-Ohm at 1kV
• EE installed back onto target assembly (fasteners not tightened).~ 0.8 G-Ohm at 1 kV

There was some material deposited on the EE. Some of which has fallen off - possibly during removal of the electrode from the target assembly. It seems the cause of the short was material build up between plasma electrode and extraction electrode. See photos.

The heat shield lid was removed after lunch. This revealed a broken target. The target may have broken after operation (in hot cell).

Photos are available on DocuShare

TM2 has been disconnected in ITW (except vacuum lines). The vacuum system is still operating.

All water lines on TM2 and TM4 are purged for upcoming water lines helium pressure test.

Dan and I leak checked TM2 and ITW primary vacuum vessel. It was found a 1X E-7 atm.cc/sec leak on top T flange seal between TM2 and dump module in first time check. But it is not a repeatable leak. I checked the same spot and around area two more times with increased helium volume.It did not show up again. The first response could  be a helium drift to dry scroll pump. I will check it again later. The primar vacuum vessel on ITW and TM2 are leak free. 

Dan and I found a small  leak on ITW dump module  top flange seal. The leak detector got a response  to 7xE-9 atm.cc/sec when I spray the helium to west side of dump module top flange. We tested again, and got same result. The o-ring which seals ITW dump module top flange is deteriorating. It need to be replaced at a proper time. This is the only air to vacuum leak we confirm so far on primary and secondary vacuum vessel on TM2 and ITW. The module and station no other air to vacuum leak.

The TM2 water lines helium pressure tested started in ITW. The helium pressure 70psi. The result so far is: Window: good, GE: huge leak directly shoot over E-7 atm.cc/sec( need to be confirmed tomorrow), HS: good, EE: good, MSP: tiny leak which is response to 3-4xE-9 atm.cc/sec. Coil 1 : small leak which is response to 1.3XE-8 atm.cc/sec. Tomorrow, We will test the rest water lines on TM2which are TA+, TA-, Tube+, Tube-, and coil 2. And We will confirm the GE huge leak at the last.

Finished the helium pressure test on TM2 water line.70 psi helium, The result of the rests 5 circuits: coil 1: leak 7.2xE-8atm.cc/sec,Ta(+): small leak 1.7XE-8 atm.cc/sec, Ta(-) small leak 8.7xE-9atm.cc/sec,Tube(-) 1.5 x E-8 atm.cc/sec. Tube(+)small leak 3.7xE-8 atm.cc/sec.    We repeated the helium pressure test on GE. There is a huge leak on TM2 GE circuit. The leak detector shoot up to E-7  atm.cc/sec right after the helium was applied.It went up to E-6 range in less than 1 minutes.