Difference between revisions of "December 10, 2019 FCAL Insert Design Meeting"

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(Agenda)
(Agenda)
 
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** Air/water heat exchangers (4x)
 
** Air/water heat exchangers (4x)
  
* Assembly [[Media:Module installation procedure.pdf]]
+
* Assembly [[Media:FCAL Insert Module installation procedure.pdf]]
 
** Measure existing FCAL geometry before removing
 
** Measure existing FCAL geometry before removing
 
** Measure stacks of crystals before assy
 
** Measure stacks of crystals before assy

Latest revision as of 15:19, 13 January 2020

Meeting Time and Place =

Tuesday, December 10, 1:30pm At Jefferson Lab, room TED 2504

  • Present - Sasha Somov, Josh Crafts, Eugene, Stephanie, Keith Harding, Tim, Fernando, Chris Stanislav

Agenda

  • Action items from last meeting https://halldweb.jlab.org/wiki/index.php/October_25,_2019_FCAL_Insert_Design_Meeting
  • Discuss Tungsten absorber
    • Cover 1.5 crystals ok?
    • Rohacell supported
  • Monitoring System
    • Testing plan?
    • 1mm fibers - Josh has them
    • 15cm square with 6mm 45 degree bevel - 2 pieces made
    • Diamond end mill procured
  • 12 crystal test setup
    • All hardware fabricated and installed
  • 9 piece Magnetic field test setup
    • Steel shields annealed and mu metal installed
    • 3 in-oz torque wrench procured
    • Josh working on assy
    • Additional field test in Dipole
  • Design Requirements/Specs
  • Crystal Array
    • Crystals, 2.05cm square, 20cm long
    • Design for 40 x 40 array with ability to go 32 x 32
    • 2 x 2 crystal hole with steel insert, 2mm wall, 3.8cm ID
    • Inset crystals 12.5cm DS of Lead glass blocks
    • use 25um brass straps
    • 350 um mu metal
    • additional 100um mu metal inside
    • separate by 25um kapton
  • Tungsten Absorber
    • 6 cm thick
    • cover 1.5 crystals
    • Support on rohacell, align to center tube
  • Monitoring
    • 1/2" acrylic sheet
    • 6mm x 45° beveled edge
    • LED/ 1mm fiber input through Rohacell
    • Total number of fibers = ?
    • Gasket between module end and acrylic to reduce cross talk
  • Cooling
    • Design for 10°C
    • 2.1 KW needed - 2 chillers
    • 9 parallel circuits for each chiller
    • 2 manifolds (BL, BR)
    • potted copper tubes into aluminum conduction cooling blocks
    • Cooling of center tube needed and to be removable
    • Entire Dark room is an insulated freezer
    • De-humidification needed
    • Air/water heat exchangers (4x)
  • Assembly Media:FCAL Insert Module installation procedure.pdf
    • Measure existing FCAL geometry before removing
    • Measure stacks of crystals before assy
    • 19 lead glass blocks surround crystals on each side
    • Determine qty and location of aluminum shims
    • Machine Rohacell to measured size
    • Pre-assemble acrylic/fibers/Rohacel before installation
  • Electronics/Cabling
    • Use HV and signal patch panels
    • HV cables are 48 wire with PCB mounted connector
    • 1600 signal connectors on patch panels

Minutes and Action Items