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.

I did a leak check on TM1 window circuit  2 soldering  stems in service cap.The round side panel was opened for the job. I sprayed helium on the stems for 10 seconds. The leak detector got a tiny response(from 0.0xE-9 atm.cc/sec to 2.0xE-9 atm.cc/sec). The test  repeated again. The second time, LD climbed  to 1.2xE-9atm.cc/sec. It looks like there is a very tiny leak on the stems soldering spots. But , this is not the same leak we found from SHC helium spray which LD climbed to 1.4xE-8atm.cc/sec with only one click helium spray by Chad.

 Because of the high air flow at SHC when the round panel is removed, The result is not conclusive. The same test is done at silo without  airflow. We found a big leak on this soldering stems . See later e-log.

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

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.

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.

TM#1 has been moved from the south west silo to the south hot cell.

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

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

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

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

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.

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.

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

Argon venting TM2 at CS.

Thursday, August 27, 2015, 10:10: Started water system. TK2 level reduced from 24.9 to 23.5 in. 

IG2 not working. Force is ON.

EE in conditioning mode.

 Friday, August 28, 2015, 08:39: BIAS/EL 10 / 5 kV

Friday, August 28, 2015, 08:49: BIAS/EL 20 / 10 kV

Friday, August 28, 2015, 09:18 BIAS OFF. Ramping to 200/100 A at 2/1 A/min

Friday, August 28, 2015, 15:46: Target at 76 / 38 A. Changed ramping to 100/40 at 1/0.5 A/min

Friday, August 28, 2015, 22:20: Ramping down heaters.

Saturday, August 29, 2015, 09:50: RGA off. PNG1 7.85E-6 / 5.0E-6 T (EPICS / local)

Saturday, August 29, 2015, 10:11: BIAS/EL 20 / 10 kV

Saturday, August 29, 2015, 10:28: BIAS/EL 30 / 15 kV. Some sparking around 29 kV

Saturday, August 29, 2015, 10:43: 10 min w/o sparking

Saturday, August 29, 2015, 10:55: BIAS/EL 32 / 15 kV. Small vacuum responses for every 100 V increase

Saturday, August 29, 2015, 11:03: Sparking at 33 kV

Saturday, August 29, 2015, 11:12: BIAS/EL 34 / 15 kV

Saturday, August 29, 2015, 14:22: Power has returned after site-wide power outage, but no communication with IOC yet.

Saturday, August 29, 2015, 15:13: IOC restarted.

Saturday, August 29, 2015, 15:14: Starting turbos

Saturday, August 29, 2015, 15:22: Turbos at speed.

Saturday, August 29, 2015, 15:22 : MP3 not running. Investigating

Saturday, August 29, 2015, 15:47: Reset MP3 breaker (wait 5 min for capacitors to empty)

Saturday, August 29, 2015, 15:48: Water system running

Sunday, August 30, 2015, 09:38: BIAS/EL 10 / 5 kV

Sunday, August 30, 2015, 09:54: BIAS/EL 20 / 10 kV 

Sunday, August 30, 2015, 10:01: BIAS/EL 30 / 15 kV 

Sunday, August 30, 2015, 10:12: No sparking

Sunday, August 30, 2015, 10:27: BIAS/EL 35 / 15 kV 

Sunday, August 30, 2015, 10:37: No sparking

 Sunday, August 30, 2015, 10:52:  BIAS/EL 37.5 / 15 kV 

Sunday, August 30, 2015, 11:00:  BIAS/EL 37.5 / 20 kV. No sparks

Sunday, August 30, 2015, 11:22:  BIAS/EL 40 / 20 kV 

Sunday, August 30, 2015, 11:34: No sparks

Sunday, August 30, 2015, 12:00: BIAS/EL 42 / 21 kV

Sunday, August 30, 2015, 12:32: Sparking at 43.5 kV. Tripped off PS on conductivity (spark response)

Sunday, August 30, 2015, 12:44:  BIAS/EL 40 / 20 kV. ISAC Ops will monitor over lunch

Sunday, August 30, 2015, 14:20: BIAS/EL 43 / 20 kV

Sunday, August 30, 2015, 14:41: Sparking at 43.5 kV. lowered to 43 kV

Sunday, August 30, 2015, 15:56: Sparking every 5-10 min at 43.4 kV not able to increase to 43.5 kV. Sparking is causing signal response on water conductivity and drop in IG1 and IG1S readings during sparking.

Monday, August 31, 2015, 08:33: BIAS/ EL to 40 / 20 kV in 9 min w/o any sparking

Monday, August 31, 2015, 08:44: No sparking

 Monday, August 31, 2015, 08:46: BIAS/ EL to 42 / 20 kV

Monday, August 31, 2015, 08:53: BIAS/EL 43 / 20 kV. Two vacuum/current responses

Monday, August 31, 2015, 09:47: BIAS off to investigate spakring.

David observed sparking coming from under the HV cover on TM2 twice. When the cover was removed, spark marks on a rubber plug for the water lines was observed. The plug with marks and one more plug was removed from the service cap as it is not used. See attached PDF.

Monday, August 31, 2015, 10:09: BIAS/ EL to 40 / 20 kV in 8 min w/o any sparking

Monday, August 31, 2015, 10:15 BIAS/EL 43.5 / 22 kV. One small spark

Monday, August 31, 2015, 10:30: No sparks

Monday, August 31, 2015, 10:35: BIAS/EL 44 / 22 kV.

Monday, August 31, 2015, 11:00: BIAS/EL 45 / 22 kV.

Monday, August 31, 2015, 11:31: PNG1 taken out by a spark

Monday, August 31, 2015, 12:04: Reset power to PNG1 controller. PNG1 back online.

Monday, August 31, 2015, 12:25: BIAS tripped on IG1 after a spark at 47.1 kV

Monday, August 31, 2015, 12:39: BIAS/EL 47 / 24 kV. No sparks for 5 min

Monday, August 31, 2015, 12:54: PNG1 taken out by spark at 47.7 kV

Monday, August 31, 2015, 13:02: BIAS/EL 48 / 24 kV

Monday, August 31, 2015, 13:07: No sparks

Monday, August 31, 2015, 13:25: BIAS/EL 49 / 24 kV

Monday, August 31, 2015, 13:30: No sparks

Monday, August 31, 2015, 13:37: PNG1 returned after a spark

Monday, August 31, 2015, 14:06: BIAS/EL 50 / 25 kV

Monday, August 31, 2015, 14:45: No sparks.

Monday, August 31, 2015, 15:15: BIAS/EL 51 / 25 kV

Monday, August 31, 2015, 15:38: BIAS/EL 51 / 30 kV

Monday, August 31, 2015, 16:01: Tested XCB0 and YCB0 to 5 kV. Some sparking. Tested CCB0 to 4 kV. No sparking.

Monday, August 31, 2015, 16:50: No sparks for 1 hour at 51 / 30 kV.

Monday, August 31, 2015, 17:00: HV off.

 Monday, August 31, 2015, 17:07: EE at 2 kV, R= 1 MOhm

Monday, August 31, 2015, 17:08 : EE off.

Monday, August 31, 2015, 17:10: Water off.

Monday, August 31, 2015, 17:12 : Vacuum gauges off. Turbos off. Roughing pump off.

Electrical check of TM#2 at the conditioning station under vacuum. The resistance value of the target to 60kV common is a bit lower then what it was at the south hot cell.

LD base LR 0.0xE-9 atm.cc/sec , 80 psi helium 2 minutes on HS and window circuits. No leak. Also, the reinstalled(after rewiring job) TP2 and PNG1(steers) side panel have been leak checked. No leak.

Turbo-pumps are started . The pumping down is good so far.

Chad and I leak checked TM2 HS and window circuit VCR joints with ZrC target and containment box installed at SHC. No leak has been found. They will   be helium pressurized  at CS later.

TM#2 with ZrC#7 has been moved to the conditioning station from the south hot cell.