Difference between revisions of "Minutes-4-7-2011"

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= Minutes =
 
= Minutes =
  
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Participants: Bill, Dave, Chris, Simon, Beni, Eugene, and Lubomir.
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Participants: Bill, Eugene, Dave, Chris, Roger, Fernando, Simon, and Lubomir.
  
 
== Production ==
 
== Production ==
  
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- Just before the meeting the review committee send us their final report, linked above to the agenda.
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- Just before the meeting the review committee sent us their final report, linked above to the agenda. Eugene commented on it: there are no show-stoppers and the FDC production can continue. There are no recommendations, just findings and suggestions on which we may answer later. The main suggestion is to test the z-axis conductive tape technique for gluing the rigid-flex assemblies.  They suggest to test the radiation damages and also to continue with the conventional testing in longer term. Even if it turns out later during the production that there are problems with this technique, it will be possible to re-solder the rigid-flexes using standard soldering technique. The committee also suggested to work on the packaging and storing of the materials and assemblies. There were some healthy concerns related to the air quality (due to the use of chemicals), HV as used for testing the chambers and also ergonomic conditions. Overall the conclusions of the committee are very positive and Eugene thanked to the people involved in the FDC review. 
  
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- Dave:
  
 
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- Dave: The first test cathode was finished using a "good" third panel. It will be tensioned nest week. The PC used for tensioning was fixed by the CC. The stringing table is now in the clean room. Some additional fixes on the strongback are needed and will be done separately outside of the clean room.
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- Bill is ready with the FDC drawings needed for the review, except two on which Rich Getz is working. Dave is working on the procedures. We will post for the review all the procedures
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needed to start the production even if some of them are nor approved yet. The main reason is that there are some details and parameters reflecting the new design that can be establish only during the production of the first chamber layer. Still these procedures are needed for the review even if they may be changed. Bill will work on "FDC CUTTING CATHODE FOIL HOLES AND SLOTS", "FDC CATHODE GROUND FLAPS AND PANEL CONNECTIONS", "FDC END WINDOW GLUING AND TENSIONING" and also on cathode and ground tensioning, the latter require information from the tensioning done before. Dave will take care of "FDC WIREPLANE CUT WIRES AND REMOVE TAPE", "FDC FABRICATE O-RINGS", "ATTACHING THE DAUGHTER CARDS TO CATHODE FRAME", and "ATTACHING THE DAUGHTER CARDS TO THE CATHODE FOIL". We decided in the latter procedures to assume using conductive tape, of course later we can modify it if it is needed. Beni will work on "SINGLE LAYER TESTING" procedure, and Lubomir on wire position and tension measurements. Depending on the needs, Lubomir and Beni will help Dave with the other procedures, as well. Dave has updated the QA plan waiting now for signatures. As for the safety documents, linked also at the review page, Bill asked about the flammability of the ethanol we want to use to clean the wireframes in the ultrasonic cleaner. Example: 40% ethanol solution with water is flammable at 26degC. Need the help of the EH&S people for that.  
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== Electronics ==
 
== Electronics ==

Revision as of 16:48, 7 April 2011

April 7, 2011 FDC meeting

Agenda

  1. Production
  2. Electronics
    • Status (Fernando,Chris)
    • Cathode foil inspection
  3. Engineering
    • Tests with conductive tape (Lubomir, Bill)
    • Status (Bill)
  4. Chamber testing
  5. Other

Minutes

Participants: Bill, Eugene, Dave, Chris, Roger, Fernando, Simon, and Lubomir.

Production

- Just before the meeting the review committee sent us their final report, linked above to the agenda. Eugene commented on it: there are no show-stoppers and the FDC production can continue. There are no recommendations, just findings and suggestions on which we may answer later. The main suggestion is to test the z-axis conductive tape technique for gluing the rigid-flex assemblies. They suggest to test the radiation damages and also to continue with the conventional testing in longer term. Even if it turns out later during the production that there are problems with this technique, it will be possible to re-solder the rigid-flexes using standard soldering technique. The committee also suggested to work on the packaging and storing of the materials and assemblies. There were some healthy concerns related to the air quality (due to the use of chemicals), HV as used for testing the chambers and also ergonomic conditions. Overall the conclusions of the committee are very positive and Eugene thanked to the people involved in the FDC review.

- Dave:


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