TM#4 with Ta#41 has been moved from the south hot cell to the west target station.

Maico and I leak checked HS circuit after Chad installed the target. The circuit was a little bit difficult o pump down because of residue water moister inside. But once the moisture was pumped out, the pumping down was smooth and fast. The base leak rate 0.0xE-9 atm.cc/sec, base pressure 0.0xE-4 torr. Maico checked helium flow before the leak test. Then,He sprayed helium to all 3 VCR fiitings on target with 2 seconds on each one, He also flushed 10 seconds helium around the target. There were no any response during all these test time on leak detector.He checked the helium flow again after the test  and confirmed the helium flow.  The HS circuit is leak tight.

Anders Mjos wrote:

The conductance check on the electrical check was found to be outside of accepted values for the TBHT at 7.0 mOhm. A successful attempt to reduce the conductance was made by re-tightening the bolts on the TGHT legs in the SHC. Grant operated the manipulator and torqued the bolts to about 1/8 of a turn with the air ratchet. The conductance across the TGHT (A-B) could be improved from 7.0 mOhm to 6.2 mOhm by re-tightening the bolts. The value is still somewhat higher than usual, but was deemed to be acceptable. Measurements attached.

1. TGHT leg bolts were loosened, and resistance was measured very high, as expected.

2. TGHT leg bolts were then tightened, loosened, and tightened again, and the resistance improvement was then measured (from 7.0 mOhm to 6.2 mOhm).

3. Another attempt was then made to loosen and tighten to see if there would be further improvement.  The right bolt was loosened, but the left bolt was found to be quite stiff and was left as-is (not fully loosened) for fear of breaking the supporting insulator.  Both bolts were then re-tightened, and resistance was checked to be about the same as achieved during the previous loosening / tightening attempt (step 2 above).

To tighten the bolts in all cases: the air ratchet was used first to turn the bolts "air tight" (air pedal only, no manual force) and then with the air pedal held down, manual torque was applied to turn no more than 1/8th of a turn.

The conductance check on the electrical check was found to be outside of accepted values for the TBHT at 7.0 mOhm. A successful attempt to reduce the conductance was made by re-tightening the bolts on the TGHT legs in the SHC. Grant operated the manipulator and torqued the bolts to about 1/8 of a turn with the air ratchet. The conductance across the TGHT (A-B) could be improved from 7.0 mOhm to 6.2 mOhm by re-tightening the bolts. The value is still somewhat higher than usual, but was deemed to be acceptable. Measurements attached.

TM#4 with no target has been moved from the conditioning station to the south hot cell.

UC #7 has been moved from the south hot cell to the spent target vault, it was placed in pail #110 and put in slot 8B of the vault, it was 22.6mSv/hr upon removal from the hot cell. See attached PDF for vault details.

TM#1 with no target has been moved back to the south west silo from the south hot cell.

TM#1 with UC #7 has been moved from the south west silo to the south hot cell.

 The turbo pump, roughing pump, have been turned off and the valves for venting opened. The cooling package has also been turned off.

 This afternoon TM4 with the coil removed was tested with HV. The EINZEL LENS was first tested independently while the bias canbus was being repaired. The current on the EL looked stable at 25kV for 5 minutes. At 27.5kV the current becomes unstable and occasionally sparks. This voltage was held for 30 minutes but the current did not appear to be becoming more stable. Further extended testing would be required to determine if this can be conditioned out. At this point I would suggest the EL has a HV limit near 25kV.

The BIAS and EL were then brought up to 35kV and 17.5kV respectively. This voltage was held for 35 minutes with the BAIS only sparking twice. The module can most likely hold a higher voltage but for the next 2 runs does not require more than 35kV. Further testing was not completed due to time constraints. It is recommended during the shut down that TM4 is tested to its limits. The data from the testing has been attached.

 The base card in the canbus BIAS module was determined to be faulty. Dave Morris removed a card VECC to repair the conditioning station. 

as measured today in the electrical room by David and Anders

TM#1 with UC#7 has been moved from the ITW to the south west silo.

 There is something wrong with the BIAS canbus controller. It says that it is not alive and has timed out. I have tried unplugging it and plugging it back in but that has not resolved the problem as it normally does. I have contacted Dave Morris and am waiting to hear from him. I cannot HV test without this controller.

 The electrical connection have been made and cooling package was started at ~10:50am today

 The Turbo pumps are now running on TCS

With the coil line removed an electrical check was done on TM#4 at the South Hot Cell see attached pdf.

 The roughing pump has been started.

 TM4 without a source tray was moved from the SHC to the TCS.  All went well.

The C2 circuit (coil 2) water lines and blocks have been revoed from TM4.

Water block jig could not be used as the window water block connection was nowhere near fitting into the jig (IMG_1224 image below) and therefore caused an interference causing the rest of the blocks to not mate with the jig. A different tool that has never been used was implimented and sucessful (IMG_1227 below).

 Sorry about the picture numbering format...new format will be implimented next time.