June 1, 2023, FCAL Insert Installation Meeting

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Meeting Time and Place =

Thursday June 1, 2023 9am At Jefferson Lab, Hall D Counting House and on Zoom https://jlab-org.zoomgov.com/j/1619449114?pwd=UFlVQ1dWTGZ0ZkVYSEx5QzE4YUI3dz09&from=addon meeting ID: 161 944 9114 Passcode: 562689



  • Reviewed minutes from last meeting
    • Discussed shimming, will follow suit with IU and put 80um shim between the cooling blocks and the horizontal (straps towards sides) glass blocks
    • Malte working on getting as many "green" blocks as possible.
    • Students are doing visual inspection of crystal modules and removing the 400 existing signal cables that will not be used
    • LMS box is almost settled, maybe temperature controlled using copper block or radiator. will use additional iron tube to shield pmts
      • Eugene said we can buy an additional chiller ($1500) if needed
      • Need to set up a separate meeting to discuss details of LMS design
  • Crystal stacking mock up going well
    • Hakob has arrived
    • Need to meet to discuss stacking procedure
    • Sasha will color code crystal module so it is known where they go in the stack up
    • Stacking procedure is updated (v7) to latest thoughts and can be found at: O:\halld_engineering\FCAL 2
  • Frame mods going well. we will break down stacking setup in ESB next week to bring to hall and install in the frame
  • We expect to be ready for stacking in about 3 weeks
  • Keith H. will give Malte a printout of the glass modules to mark up where green and blue modules go
  • We will meet again in 3 weeks as several people will not be available