Difference between revisions of "Minutes-9-12-2013"

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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.   
 
- 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.   
  
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- According to Bill the nominal spacer between the BCAL plate and the rails is 3/16" thick (4.76mm)
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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 ==
  
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- The strips to connect the bearings of the four packages can be used as a ground connection and no additional ground cable is needed for that; Fernando agreed. We decided to have the strips plated for better surface conductivity. In addition Bill will use washers with teeth to connect to the bearing plates. It is not clear yet if one can use also the mesh as a ground connection. At the same time it may serve as a Faraday cage for the CDC!
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- Bill made the slot
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- Bill and Dave will figure out when there will be a tech available to work on the skin: making slots on the g10 and cutting the plastic holders. We will need also Casey to install the tubing between the cooling manifolds.
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- Bill wants to test the new mesh support in the ESB. Only after that we will remove the four extra rails together with their holders on the installation carts.
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== Electronics ==
 
== Electronics ==

Revision as of 17:08, 12 September 2013

September 12, 2013 FDC meeting

Agenda

  1. Installation preparations [1] (all)
  2. Engineering (Bill)
  3. Electronics (Chris, Nick)
  4. Tests in EEL126 (Beni, Vlad, Lubomir)
  5. Other


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