Minutes-12-6-2012

December 6, 2012 FDC meeting

Agenda

1. Production Construction Tracking
   • Production status (Dave)
   • Package testing (Lubomir)
2. Corrosion tests (Lubomir)
3. Engineering (Bill)
4. Electronics (Chris, Nick)
5. Tests at EEL126 FDC E-log
6. Other

Minutes

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

Production

- Dave: priority is to finish the two type-3 cathodes so that we can build three cells from package #2. The first type-3 will be ready on Monday, then we can start the package #2 installation. Working also on all the other cathodes for this package. Since Tina and Mike will start working also on BCAL we'll have to find a way to finish at least these cathodes, that has to be done by the end of January.

- Package #4: the broken wire (top cell) was replaced and the package put together last Friday. This week the top cell was tested: all channels working fine, very low currents of 15/-4nA, oxygen after six days flushing ~160ppm. The plan is to take the package from the installation table and start putting the other subsystems. The problem is that we still don't have the clips.

- Package #3: as explained in entry #98, the package was connected to the Nitrogen dewar with a rotameter at 30sccpm, and there was an over-pressure over the last weekend. We measured the pressure at the output of the rotameter: 360Pa, so the pressure in the chamber must have been below that.

Electronics

- Chris: delay with the clips due to lack of material. They made only 135 (out of 500) and Chris asked them to ship these; plus about 50 here could be enough for one package. Nick populated one more set of PCB and will do another (the last) one soon.

Cathode corrosion test

- Lubomir: test #3 (Ar/CO2 gas, at ~70degC). One more sample failed over the weekend, 25 days after the start of the test: one of the two Viton samples, second Viton is OK. Again we suspect it is the solder that failed.