Difference between revisions of "Minutes-4-14-2011"

From GlueXWiki
Jump to: navigation, search
Line 28: Line 28:
 
- the PCB ring was glued for the first production wire frame. Tests with light show the surface at the seams is not perfectly flat. Anatoly will work on this. Next steps: trimming the Rohacell OD on the wire frame and laminating the PCB ring. We will accelerate this so that we can work on the wire frame in parallel with the cathodes. Bill asked if it will be acceptable to use parafin to cover some parts of the Rohacell OD that is needed for the ultrasonic cleaning. Lubomir will investigate this.  
 
- the PCB ring was glued for the first production wire frame. Tests with light show the surface at the seams is not perfectly flat. Anatoly will work on this. Next steps: trimming the Rohacell OD on the wire frame and laminating the PCB ring. We will accelerate this so that we can work on the wire frame in parallel with the cathodes. Bill asked if it will be acceptable to use parafin to cover some parts of the Rohacell OD that is needed for the ultrasonic cleaning. Lubomir will investigate this.  
 
    
 
    
−
- 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 study 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: the production actually started already on April 1st with making one cathode foil that will be used for the first chamber. The test cathode was glued to the frame but some additional tooling is needed to cut the foil. In the mean time we will tension the first production cathode foil. Also, the first production PCB ring was glued. Now we have the tools to trim the Rohacell on wire frames. For the start of the production we will use the solder wire from UVA, even it's thicker (~0.7mm) than what we have ordered. 
+
  
 
== Electronics ==
 
== Electronics ==

Revision as of 15:54, 14 April 2011

April 14, 2011 FDC meeting

Agenda

  1. Production status (Dave)
  2. Electronics
    • Status (Fernando,Chris)
    • fADC125 requirements
    • Cathode foil inspection
  3. Engineering
    • Status (Bill)
    • Radiation tests with conductive tape (Lubomir)
  4. Chamber testing (Lubomir)
  5. Other


Retrieved from "https://halldweb1.jlab.org/wiki/index.php?title=Minutes-4-14-2011&oldid=26566"