Difference between revisions of "Minutes-9-19-2013"

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= Minutes =
 
= Minutes =
  
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Participants: Bill, Dave, Vlad, Beni, Nick, and Lubomir.
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Participants: Bill, Dave, Chris, Nick, Simon, Vlad, Beni, Glenn, and Lubomir.
  
 
== Installation preparations ==
 
== Installation preparations ==
  
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- As indicated by Elton, after the BCAL was inserted in the magnet, it might be down w.r.t. the magnet axis by ~1/8". BCAL will be surveyed and then we will have the final numbers. However they will start the installation of the rails inside BCAL soon and we discussed how they should be aligned. For the FDC the most important is to be aligned w.r.t. the beam line. We have copper-free area of 12mm radius and insensitive area of 30mm, so 3mm is significant given the sharp rise of the background rates with the distance to the beam. Beni: for the tracking it is important also to preserve the magnetic field symmetry, so the FDC should be aligned with the magnet axis. Hopefully, the magnet and the beam are well aligned.  
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- The four rails inside BCAL that will support the FDC, CDC, and the mesh were installed, but not adjusted. Survey of the BCAL position has been done, but we haven't seen the results yet. Next, depending on the BCAL position, the rails have to be aligned, that will take several days survey people working there. If they can't be adjusted to the nominal distance, as it was adjusted already on the three installation carts, we will have to re-adjust the distance between the rails on the cart. It will not be easy to adjust the rails on the cart where the FDC is, but Bill says it's doable.  
  
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- According to Bill the nominal spacer between the BCAL plate and the rails is 3/16" thick (4.76mm), which means one can still do adjustments of the rails if the BCAL offset is not more than 3mm. If it is more, it will mean FDC will sit asymmetrically w.r.t. the top and bottom rails and the complication might be the installation/access of the connectors against the rails. 
 
  
 
== Engineering ==
 
== Engineering ==

Revision as of 15:19, 19 September 2013

September 19, 2013 FDC meeting

Agenda

  1. Installation preparations [1] (all)
  2. Engineering (Bill)
  3. Electronics (Chris, Nick)
  4. Tests in EEL126
    • New F1TDC (Beni)
    • Thick cell analysis (Vlad) [2],[3]
  5. Other


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