Weekly update target hall schedule and activities. See attachment 1,2

Update and extend Target Hall schedule to Sep 08.  See attachment 3,4

The containment box was taken off TM2 in preparation for installation of a new coil line isolator.

ITA6272 and ITA6273 have been received from the Scintillator Shop.  ITA6274 should be ready by the end of today.

Tuesday, August 11,  insulator ITA6272 was installed onto the "pin x" line (unused plasma electrode) and tested; it seems to have successfully eliminated the shorts on that line.

Wednesday, August 12  "shunts" installed on tube heater and oven circuit and electrically  tested.

Thursday , August 13, dummy target installed.

As previously mentioned, dump target installed with new mounting and high current fasteners.

Leak Check complete and ready to move to CS at 1:30

I finished the rest TM2 connections to CS, and started CS cooling package. Everything works fine so far.

During the TM2 HV test at CS, It failed. In order to confirm there is no any water leak inside the module after the heaters and beam extraction test, I disconnected all the water lines on the TM2, and purged the water lines with pressure air. Leak detector was reconnected back to the TM2 service cap, and all water lines are pressurized with 80psi helium again each for 2 minutes.No any leak had been found during the test. All the water lines are still perfectly sealed. Also, I checked all the vacuum to air seals on the top of the module.They are good either.  Anders used the RGA  tracking the helium during the test. No leak.

TM2 was disconnected at CS. Travis and I did  electrical check before the venting. After,The module was vented and moved to SHC. The moving is smooth.

 Weekly update target hall schedule.See attachment 1,2

Spring and summer run is close to the end. This will be the last update on this old schedule. See attachment3,4.    A new schedule for TH activities after mini shut down will be posted next time.

 Filled to 24.9 in

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.

 The power supply is needed as a spare for the failed TGHT p/s in ITW

I attach new Target Hall schedules here for 2015 fall and winter runs (beam schedule 129). The TH excel sheet schedule for beam 129 is included also.

Weekly update of Target Hall Schedule.See Attachments 3,4

Vacuum leak check on the window line circuit of TM1 took place yesterday and again to confirm this morning. Both days the response to helium is in the area of a soldered reduction fitting at the top of the containment box above and to the shutter side of the extraction column (see attached picture). To verify this morning each joint in the system had a 1 second shot of helium and then timed for 1 minute to wait for a response. This area responded both times tested at about 40 seconds...no response at any of the other locations.

Hot cell was entered for preventative mait. on left manip. field measurements around the cell were taken in prep. for window removal in January and left/south light bulb changed.

Hottest item in the cell was the conductor block end of the TM4 febiad coil line. It was 70 mSv/H on contact and seemed to be the major source of field in the hot cell. The waterblock end of this line did not apper to be hot.

Replaced the custom silver gaskets on the entrance window panel of TM1 this morning...this has eliminated an sign of leak at this joint, however there appears to still be a leak somewhere...a good distance from the vcr joints of the window as we are getting a drift response.

Chad sprayed helium to soldering stems in containment box which we suspected with leak last week. With 1second click  on helium, after 80 seconds waiting time , the LD started to show leak up to 3xe-9atm.cc/sec.

Chad sprayed helium close to service tray and vacuum chase. with 1second click on helium , after 30 seconds waiting time, the LD started to show leak up to 2Xe-8 atm.cc/sec.

After this test, we knew the leak is somewhere in service tray or service cap, but not the soldering stems in containment box we suspected before.The further investigation is needed.

 Leak check TM1 window circuit soldering stems inside service cap when module is located at NE silo. LD base LR 0.0xE-9atm.cc/sec.  Only 1 second tiny amount  helium sprayed on stems soldering joints . LD got a quick response to high E-7 atm.cc/sec.Test is repeated again with same result.  See attachments

weekly update see attachment

In preparation for shipping of the spent targets five have been moved to the mini storage. The following target were moved to the mini storage, SiC#26, Ta#36, UC#9,10,11.

 will be performed Tuesday October 6th

Tuesday, October 06, 2015: Maintenance re-schedlued for Wednesday October 7th