Revision as of 16:45, 4 April 2013

April 4, 2013 FDC meeting

Agenda

1. Production Construction Tracking (Dave)
   • Package #3 repair
2. Installation (Lubomir, Bill)
   • Cable installation: Rich's models [1], [2], [3]
   • Plans for practicing at Blue Crab
3. Engineering (Bill)
   • Cooling system status [4]
4. Electronics (Chris, Nick)
5. Tests at EEL126 FDC E-log (Beni)
6. Other

Minutes

Participants: Fernando, Eugene, Bill, Dave, Chris, Nick, Simon, Beni, and Lubomir.

Production

- Dave: will start wire deadening tomorrow; wire frames #2 and #3 will be the first to go with. In total 4 wire frames have to be deadened.

- Package #3 repair: we scanned all the wires of the HV sector #2 (on the wire frame of cell #6) using the camera of the motion station on the stringing table. There were three field wires with some stuff we could not clean. We disconnected these wires from the HV side, by un-soldering and cutting the end of the wire, but without success: the HV problem remained. Then we removed half of resistors at the HV side of the sense wires and the problem went away. Using this method we went down to 5 questionable wires, and at this moment Anatoly found a tip of a sense wire (~5mm) sticking out of the solder. After fixing this, the chamber now is holding HV already 10 hours. We will wait till tomorrow and then Casey will replace the three field wires, so the wire plane will be ready for installation by Monday. Bill suggested to glue/tape somehow the spacer ring to the wire frame when mounting it from the back of the package; will need more people for that.

Installation

- Yesterday, there was a "FDC cable installation" meeting on which Rich Getz presented his new plan shown on the three pictures attached above.

Engineering