May 17, 2023, FCAL Insert Installation Meeting

Meeting Time and Place =

Wednesday May 17, 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

Agenda

• Minutes from last meeting https://halldweb.jlab.org/wiki/index.php/May_10,_2023,_FCAL_Insert_Installation_Meeting
• Status of dis-assembly
  • Shimming found to date Media:Shimmap.jpeg
  • Frame removal work starting today
• Preliminary Stacking test
  • Media:compressed.jpeg
  • Media:thinpad.jpeg
  • Media:tightscrew.jpeg
  • Media:torque.jpeg
  • Media:Stacktest.jpeg
• Crystal/glass boundary
  • Media:Thermacool.pdf
  • Samples in hand (.062" and .035", no glue) - look and feel fine
  • Thermal test TBD
  • Stacking test ready for crystals
• LMS headway

Minutes

• Reviewed minutes from last meeting
  • Discussed shimming of existing FCAL
    • No shims found until the center stainless steel tube. Shimmed with 1 80um shim where no strap against the tube as expected
    • Shims on edge steps 0.5 to 1.5mm. Was 1.5 mm by design
    • One of the lower rows had various shims 80 - 160 um?
    • 1st row had 80um every other module
    • Module height at some rows varied as much as 350 um with no shims.
    • looks like it was determined at some point in time it was decided that shimming added no value.
  • Malte gave update that all modules were removed as of yesterday
  • Discussed need for stacking map - will have large printout with orientation and color code (blue or green)
  • Sasha ordered cable labler
  • Sasha wishes to assemble cables in ESB - should be fine
  • Lead Glass module Stacking test in ESB - existing FCAL 40.141 mm per block on average
    • 1st row stacked - 15 modules -
      • 40.164 mm average module width before squeezing
      • 40.111 mm average module width after squeezing less than 3 inch-lbs per screw
      • 53um per module change - 800um for entire row.
      • 40.137 mm ave after release - 26um per module - 390um spring back
    • 2nd row stacked - 21 modules - same block
      • 40.18 mm initial width
      • 40.14 mm final after squeeze 2 in-lbs