Difference between revisions of "Minutes-2-17-2011"

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damaged cathode foils and then use the new/good ones. The ultimate plan is to build parts for one chamber that has to be tested before the mass production.   
 
damaged cathode foils and then use the new/good ones. The ultimate plan is to build parts for one chamber that has to be tested before the mass production.   
  
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- Dave's working on the procedures/travelers, we can't start production without these documents.
  
 
== Electronics ==
 
== Electronics ==
  
- The thickness of the rigid board of the rigid-flex assemblies was modified according to Roger's e-mail, but Bill found in the actual file that it was not. Roger was not there to clarify. Lubomir will contact Roger also regarding the foil production status.  
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- Chris: 50 cables were reworked, but 13 of them came short by a foot. It turned out those are CDC cable. Even if the length is not critical, we decided not to accept such cables for the FDC.  
  
- Bill and Dave had questions to Fernando about the solder to be used for the wires. Two solder types were used for the test wire plane: the solder recommended by Fernando and the solder paste used to tin the cathode contacts. It was easier to work with the later, while the use of the first one resulted in too thick solder layer. Fernando doesn't recommend the solder paste: corrosive and also more difficult to clean the flux. Fernando and Chris will look for a thinner solder wire. 
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== Engineering ==
 
== Engineering ==

Revision as of 19:21, 17 February 2011

February 17, 2011 FDC meeting

Agenda

  1. Production (David)
    • Blue Crab status
  2. Electronics (Fernando, Chris, Roger)
    • Rigid-flex and foil production status
    • Other
  3. Engineering (Bill, David, Lubomir)
  4. Chamber testing
  5. Other


Minutes

Participants: Bill, Mark, Dave, Chris, Simon, Beni, and Lubomir.

Production

- Dave: the stringing table and the cathode tensioning system are the only main items not yet moved to Blue Crab. The stringing table will be modified before moving there: 6 holes in the granite have to be drilled and different other new pieces mounted there. Will have three computers in the clean room, one new and another two used, all Windows. The temperature in the clean room is lower than the required one and the vendor will fix the problem tomorrow. It turned out the temperature control is not in the clean room and we are not supposed use it.

- The plan for the next month work at Blue Crab includes: cathode frame inspection, building PCB rings, cutting, aligning, and gluing cathodes. We will start with old PCB and damaged cathode foils and then use the new/good ones. The ultimate plan is to build parts for one chamber that has to be tested before the mass production.

- Dave's working on the procedures/travelers, we can't start production without these documents.

Electronics

- Chris: 50 cables were reworked, but 13 of them came short by a foot. It turned out those are CDC cable. Even if the length is not critical, we decided not to accept such cables for the FDC.