Minutes-9-23-2010

September 23, 2010 FDC meeting

Tentative Agenda

1. Production
   • Clean room update
2. Electronics
   • update (Fernando)
   • discussions of the FDC requirements for the pre-amplifiers and fADC125 [FDC requirements],[FDC Log Book, pages 516-517]
3. Engineering
   • Cathode foil: sole source procurement status (Fernando)
   • Wire stringing: status and plans (Bill, David) [[1]], [[2]],[[3]]
4. Full-scale prototype
   • test update (Beni)
   • momentum resolution studies [FDC Log Book, pages 515] (Simon)
5. Other

Minutes

Participants: Eugene, Fernando, Beni, Bill, Chris, David, Simon, Gerard (on the phone), and Lubomir.

It was a long (2.5 hours) but productive meeting, half of the time discussing the FDC requirements for the electronins, and the other half - the wire stringing procedure.

Production

- Only good news about Blue Crab, procurement will finalize the contract with AdvanceTEC for the construction of the clean room by the end of the month. The AC for the whole area is being installed now.

Electronics

- Fernando: we have now all the PCB boards (except maybe one set, out of 28, that has to be checked). The contract with the assembly company is awarded.

- Fernando: according to the procurement, the sole source for the cathode foils is out of question. Therefore, Fernando submitted the specifications to be posted on the FedBiz site with a deadline for possible offers of Oct. 13.

- Lubomir started preparing a document explaining the FDC requirements for the pre-amplifiers and flash ADC125. It is based on the tests of the full-scale prototype including with fADC125, and on Garfield simulations. This document linked above contains more details that were discussed. Conclusion for the gain of the cathode cards: present value of 2.6mV/fC will work for the FDC. To be safe we specify gain range of 2.0 - 3.2. The problem is that in the current pre-amp design, the next possible gain below 2.6 is 0.9