TM#2 with Ta#54 has been moved from the conditioning station to the west target station.

Thursday, September 28, 2017

Cooling water not yet connected to TM.

High leakage current still observed. 200 uA at 22 kV. Did not go past 25 kV. 

Friday, September 29, 2017, 14:05: Started heater ramping to 580 / 200 A at 1 A/min

Friday, September 29, 2017, 14:09: BIAS / EZL / EE at 20 / 10 / 1.5 kV. BIAS current at 90 uA

Monday, October 02, 2017, 10:29: Accidentally set BIAS current limit to 0 A (step size too large) at 28 kV. This also caused the TGHT to got to 0 A. Recovered to 580 A in 10 - 15 s.

Monday, October 02, 2017, 12:07: Ramping down heaters at 2 A / min

 Due to problems with the regulating valve WPV1, the VFD (Variable Frequency Drive) for the pump has been programmed to do a slow (2 min) ramp up. WPV1 has been bypassed and left fully opened. Work was done by Dave Morris

The spent Ta#53 has been moved to the spent target vault. See attached file for details.

  I did helium pressure test on TM2 containment box window and HS line at TCS. @ 70psi helium  for 3 minutes, HS:2.2XE-7 atm.cc/sec., Window:1.2XE-7 atm.cc/sec. There is no change on HS. But LR on window is bigger than before that was in E -9atm.cc/sec range.  

 TM#2 with Ta#54 has been moved from the south hot cell to the conditioning station.

Containment box has been replaced onto TM2, interior of containment box vacuumed, and Ta#54 installed with new fasteners (high current torqued to 130 in lbs).

Electrical check of TM#2 with Ta#54 at the south hot cell. See attached PDF for details.

TM2 containment box has been removed. Found a piece of capton tape or tubing under table (see picture).

Two side panels on TM2 service cap were removed for TM2 service cap inside inspection. A piece of cable tie was found inside cap closing to service tray entrance area. All blue nylon insulators are inspected. They look good. The broken cable tie is moved out of service cap.

 Panels are installed back after the inspection.

See attachments

Electrical check of TM#2 after the insulator change on thursday september 21.

Chad and Anders inspected the Source Tray today using the camera in the hot cell. A dark spot was observed on one of the four insulators separating the Extraction Electrode from the Ground Electrode. This could potentially influence the high leakage current. Some discolored areas were also observed in the Service Tray, but these was present when the module was built. See attachment for details.

Insulators ITD0053 and 54 have been replaced. All fasteners torqued to 56 in lbs.

Electrical checks of TM#2 with Ta#53 and also with out a target.

Broken insulators ITD0053 and ITD0054 have been uninstalled from TM2.

 TM#2 with Ta#53 has been moved from the west target station to the south hot cell.

Entered hot cell to preform replacement of slave tong cable. Existing cable shows no signs of wear so it has been re-installed. A spare tong cable has been loaded into a spare tong while in the hot cell in preparation for next time this cable needs to be replaced.

 TM#3 has been moved back to the silo from the conditioning station.

TCS and TM3 all vacuum pumps are started. Everything is fine.

TM3 service tray cover plate has been removed. It is bagged and placed to TH b2 level south wall beside the silo.