Difference between revisions of "Minutes-5-10-2012"

From GlueXWiki
Jump to: navigation, search
Line 26: Line 26:
 
== Engineering ==  
 
== Engineering ==  
  
    
+
- Bill: final tests on the design of the installation cart before bidding. Had further discussions with Tim and survey group on the fiducial scheme (Bill reminded us the scheme again).
 +
 
 +
- When installing the last two cells we had problems with the metal pins and had to put vacuum grease on them to make the insertion easy. To avoid bending of the pins, as Casey suggested, we want to put two handles on them and Bill will order them.    
  
 
== Electronics ==
 
== Electronics ==
  
- For the grounding Chris got an offer for 300 clips, 100 of each type. Beni explained that we need only one type: 11mm width. Chris will ask the company again. The thickness of the material to be defined experimentally when we get some samples. We will need 20 clips per cell, or ~120 for one package.
+
- Chris: Jim and Chuck made the drawings of the grounding clip. It will be Cu-Be 13mill thick and will have a force of 7.5lb (Bill: in this case we have to use Rohacell between the wire frame and the cathode. One company only responded to the bid: $2k for 500 clips (need ~120 per package). Chris submitted a PR.  
 +
 
 +
- After some discussions we figured out that we can easily extend the grounding to the cathode from the top cell. We just extend the Cu foil to that cathode and put the clips that we have now on the top of the copper foil, thus we will also prevent damaging the cathode foil. In this case we may not need to do the inter-cell ground connections.
 +
 
 +
- Before making the clips we have to test them but the company will not give us samples, for that they need to set up the production. Bill suggested to use the 7mill brass shimming plates (that we have) and try to make a clip according to the drawings that Chris will send. At least we can test it before the production starts.    
  
 
== Tests with first package at 126 ==
 
== Tests with first package at 126 ==

Revision as of 18:23, 17 May 2012

May 17, 2012 FDC meeting

Agenda

  1. Production Construction Tracking (Dave)
    • Production status
    • Third package tests (Lubomir)
  2. Engineering update
  3. Electronics update (Chris)
    • Grounding
  4. Tests with first package in 126 FDC E-log (Beni)
  5. Other