Minutes-11-4-2010

November 4, 2010 FDC meeting

Tentative Agenda

1. Production (David)
   • Blue Crab status
   • Frame lamination
2. Electronics (Fernando, Chris, Roger)
   • Update on PCBs: delaminated PCB1 and PCB2
   • Cathode foil and rigid-flex procurement
   • Cathode foil inspection plan
3. Engineering (Bill, David)
   • Wire stringing status; position measurement system.
   • Other
4. Full-scale prototype tests
   • status, timing with fADC125 (Beni)FDC Log Book, page 535
   • wire offset studies (Lubomir)FDC Log Book, pages 534 and 536
5. Other

Minutes

Participants: Eugene, Bill, Glenn, Simon, Chris, Roger, David, Beni, and Lubomir.

Production

- The company will start bringing materials for the clean room on Nov 24. The AC for the whole area will be installed by Dec 7. Before that for the lamination we will use mostly the office (low humidity <40%), and the granite tables outside for vacuum bagging if the humidity is low. That was not the case today.

- We got all the wire frames (32) and spacer rings (30). 17 wire frames laminated; 14 are back at Vision machine for fly cut.

Electronics

- Chris: by Wednesday we will have all the PCBs populated. The company sent two pictures (link above) showing delaminations on two of the boards. They claim the delamination was there when the boards arrived. But Chris would have seen it!? Roger: the heating cycle they use may cause delamination. Chris will ask the company for information about this.

- Ultrasonic cleaning: according to Chris 6.6gal Vigon costs $285; we need 14gal. Not clear how often we have to change it.

- Roger: the cathode foil Gerber files will be sent right after the meeting. The extra connectors were included. Will have the first article by Dec 3. Roger got two quotations and two "no-bids" for the rigid-flex which is good enough for the submission of the PR tomorrow.

- We negotiated with Hall B to use a corner in their clean room for cathode foil inspection for two weeks in total. They need a schedule and a list of the people that will work there. Before that we need to decide what kind of tests we want to do. Beni: measuring connectivity of all the strips is needed for the first article. Eugene: resistivity measurements (2 Ohms per strip) and we may look for variations of the Cu thickness. Glenn: difficult for low resistivity. Roger: we may use camera for inspection. Lubomir will consult also Fernando and other people that have done this before, and will make a plan and list of the people.