Minutes-11-15-2012

November 15, 2012 FDC meeting

Agenda

1. Production Construction Tracking (Dave)
   • First package testing (Vlad)
   • Plans for finishing/testing packages #1 and #4
2. Corrosion tests (Vlad)
3. Engineering (Bill)
4. Electronics (Chris, Nick)
5. Third package tests: wire resolution FDC E-log (Lubomir)
   • Moving to Blue Crab?
6. Other

Minutes

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

Production

- Tina finished wire soldering of wire plane #30. Tension measurements will be done today. Tomorrow Chris will solder the components. Dave will deaden the wires either on Friday or Monday. So, the plane will be ready for installation in package #4 on Tuesday.

- Vlad finished testing package #1. All channels are working fine. Three pre-amps are oscillating, but the channels are working if using other cards at the same places. Two of the cards have been replaced already with new ones, still the same problem. After ground installation we hope the problem will disappear, if not we can replace the cards later.

- Package #1 was disassembled from the mounting table, we still have three metal pins in the package. It was moved to granite table and Vlad just finished the installation of the grounding clips. Next step (probably tomorrow) will be the installation of the cooling tubes. Bill made a tool to place the tube ends in the proper positions and cut them, then install the plastic manifolds. He explained how to fix the tubes during this procedure so that they don't apply pressure on the cards/cathodes.

- We plan to move the third package back to Blue Crab on Monday. We will take from it the strong-back, needed for testing the package #1 at 126, and the hubs needed to finish the installation of package #4. On Tuesday we plan to install the last two cells of package #4. It will be flushed with gas over Thanksgiving and Vlad will test it the week after Thanksgiving. Package #1 will be moved to 126 for testing the first week of December.

- 6 sets of cathode foils have been shipped on Monday. Probably they will not be able to make 18 sets with the material they have. Bill found that the 2micron-copper/Kapton foil is still available. Eugene suggested to buy material for 14 sets. Bill will ask for a quotation for 14 and 24 sets.

Cathode corrosion test

- Test #3 is going on: Ar/CO2 gas, at ~70degC. This is to study the activation energy, hopefully will have some results by Christmas. Vlad will take cathode and O-ring samples and will continue the tests at Moscow. He's leaving November 30.

Engineering

- Bill: the new SMC chiller and the fluorinert will come middle of December, finished the documentation for the pressure system, discussed with Ron Bartek the power for the chiller in 126. The chiller also require colling with water, still not clear how to do this.

- AC at 126: As Eugene suggested it's not worth investing in Blue Crab, so we will do the tests at 126. Before it was proposed to install two ceiling fans, but then a cheaper solution was found: two AC split cooling units. Bill after the meeting: the reqs for the units are out, expect to install them before Christmas.

- FDC installation schedule.

Electronics

- Vlad fond two pre-amp cards oscillating, no matter in what position on the cathodes they are. The pre-amp testing set-up has small capacitance (short cable) at the input unlike the detector. Will discuss with Cody changes in the set-up to better simulate the detector.

Third package tests

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Other

- No FDC meetings next two weeks: on Thanksgiving and the week after that. Will meet again on December 6.

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