Minutes-10-21-2010
October 21, 2010 FDC meeting
Tentative Agenda
- Production (David)
- Electronics (Fernando, Chris, Roger)
- Update on PCBs
- Cathode foil and rigid-flex procurement [1]
- Engineering (Bill, David)
- Wire stringing
- Gluing and soldering materials
- Full-scale prototype tests (Lubomir)
- gas mixture studies FDC Log Book, page 526
- Other
Minutes
Participants: Fernando, Bill, Al, David, Chris, Glenn, Simon, and Lubomir.
Production
- We have a new technician, Al, joining the FDC group.
- David: Setting up the off-site space: temporary lights were installed, more cabinets to be moved there. Working on the safety papers. The use of Hysol requires eye wash station that will be put in place tomorrow. David will contact the clean room company so that our stuff doesn't interfere with the construction. They will start bringing materials at the beginning of November. We should use the space at the angle of the shelving fences, we have 18' our space (see the sketch linked above).
- We get 5 wire frames each week from the company and send another 5 laminated with the Rohacell rings, back for fly cut. For now 10 wire frames were laminated. David, Casey, and Al are doing this job.
- We should change the FastTrack for the FDC production to reflect the fact that we will have the wire frames ready before the full production starts. David will take care of this, but it's not first priority.
Electronics
- Chris: Inspecting the first article (8, two of each) populated PCBs. Initially they could hold a maximum voltage of ~1500V.The problem: flux from the soldering under the capacitors. Chris cleaned 5 channels (using some flux-off spray) and they could hold 2500V without problems. Fernando decided to go ahead with the full production by requiring the company to improve the cleaning procedures.
- We discussed possible flux cleaning methods; we will need cleaning also after soldering the wires. Using flux-off is expensive (both materials and labor). Ultrasonic cleaner is also very expensive (Fernando) and even more difficult for large surfaces. Bill asked how much we can spend on ultrasonic cleaner. Glenn: up to ~$15K, otherwise manual cleaning is less expensive. The other problem Glenn pointed out is the power that we will need for large volumes. Bill will look for possible solutions.
- Good news about the cathode foil procurement: according to Ross Small only Allflex responded to the ad at FedBiz, he has all the paperwork (after some delay) from Allflex and will go ahead with the contract. There was some confusion about the shipment method (in tubes or boxes) but Roger will discuss it with Ross. Roger got the first quotation for the rigid-flex (linked above) and expects three more. Fernando is working also on the ASIC procurement which will be a sole source one.
