Further HV testing was completed today from ~2:00 until 3:00. The resistivity of the water was 11.7 - 12.7 Mohm. The EE was turned on to 1500 V and had a leakage current of 1.465 mA with a inline and ballast resister of 20 kohm and 1 Mohm respectively. In addition to this all of the CB were turned on to 500V. The voltage on the source tray with all bias items tied together and the voltage was then raised to 30kV in 5kV steps. It was then raised until 37kV in 1kV step at which point the first spark was detected. Steps were then reduced to 500V until 39.5kV was achieved. Sparking was noticed when stepping up from one voltage to the next and steps were reduced to 100V. At 39.7 kV there were several sparks and the voltage was held for 8 minutes until there had been at least 4 minutes since the last spark. Voltage was increased to 41.2 kV at 292.97 uA when a spark caused the HVCLTBHT paddle wheel flow sensor to trip. Flow was affected but the interlock was tripped due to noise and as a result the BIAS and EE voltage dropped to zero. At this point the required data had been collected and it was decided to shut the station down. RGA scans were taken during the test and are attached. The edited data with graphs is attached in the excel folder. PNG1 was not monitored as it has failed.

The rga application is available at
http://www.thinksrs.com/downloads/soft.htm

 The flow meter on the primary side (TCS:DIF2) of the conditioning station is broken. I investigated and there is flow, the gauge is not fouled, and the PLC does read back when current supplied. The gauge is also reciving 24V but the output is 0V and 0mA. I will contact ESC and the supplier.

 Cooling Package was started at 9:25 this morning inlet conductivity is 0.08 Mohm at 22.9C. Resistance reached 5.33 Mohm by 11:30

TM3 leak check at conditioning station without target: TM3 all air to vacuum seals have been leak checked . They are all good. Water lines TAR(+-), TUBE(+-), GAS, MSP , COIL2(+-), EE, HS(1,2) , GE,and WINDOW have been helium pressurized to 70 psi for 2 minutes each . No response had been found on leak detector. They are leak tight.. Leak detector BR 0.0xE-9atm.cc/sec, BP 0.0xE-4 torr. TM3 and CS vacuum: PNG15.2xE-6 torr, IG1 8.8xE-7 torr,IG2 2.8xE-6torr, IG1S 1.3xE-6 torr.      

 Both Turbo Pumps are now operational.

Bevan Moss wrote:

Both Turbo Pumps are now operational.

 Turbo pumps 1 and 2 both found randomly off, have been restarted

With the Turbo pump replaced I have started roughing at 10:48

 Turbo Pump 2 has been replaced on TM3. I got a count of 350 on the sleeve of my tank suit.

 Turbo Pump 2 has been replaced on TM3. I got a count of 350 on the sleeve of my tank suit.

 Both Turbo pumps on TM3 have failed. They were both attempted to start in soft mode. TP2 could only achieve ~19kpm and TP1 ~10kpm. I have turned off the scroll pump and vented through the turbo pumps.

TM#3 with no target has been moved from the south hot cell to the conditioning station. Move went well. The fields around the module was 1.6mSv/hr.

5 shielding block had been moved  back to ITE. The ITE is configured to take proton beam.

Electrical check was performed on TM#3 with no target nothing was wrong was found, but our megger does not go above 1000 volts so any problems above this value would not be seen, see attached pdf for details.

Also the 55 pin(top) double 9 pin (bottom) connector was tested as well. When it was meggered to 60kV common more then 50% of the lines failed, when those line were identified with a resistance package two were unable to be indentified. The wiring for this double 9 pin connector should be removed to prevent HV problems. New wiring is not physically possible to re-install in its place, see the PDF for the wiring details.

The heat shield circuit blank offs have been re-installed and front cover replaced. TM3 is ready to move to the conditioning station for testing.

Front containment box cover has been removed and heat shield circuit blank offs removed in preparation for installation of dummy target.

 image #1 - initail view after front panel removal.

image #2 - Heat shield circuit blank offs removed.

Ready for baseline electrical tests and 9 pin cinnector tests.

TM#3 has been moved from the NE Silo to the south hot cell, move went well.

New gaskets and fasteners have been inserted into the south hot cell in preparation for installing the dummy target onto TM3 tomorrow.

I leak checked new installed ITW EXIT1 tank to module o-ring.No leak had been found . Also ,TM1 primary vessel air to vacuum seals had been checked at the same time. There was no response had been found on leak detector.

TM1 has been reconnected in ITW. Water interlock check for TM1 is done.

On April 08th, all water lines in TM1 had been helium pressure tested(70psi) at conditioning station. No leak had been found.

TM#1 with Ta#39 has not passed it electrical check again, while sitting at the conditioning station at air. The readings have not been consistant. See the current PDF for details.

TM#1 with Ta#39 electrical check at the target station see attached PDF (CHK 4).(April 9th 2013) PASSED

TM#1 with Ta#39 electrical check at the target station see attached PDF (CHK 5).(April 10th 2013) PASSED