Difference between revisions of "April 6, 2022 FCAL 2 Design Meeting"

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(Agenda)
(Agenda)
 
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* Monitoring System
 
* Monitoring System
 
** In Testing?
 
** In Testing?
* Electronics/Cabling
+
* Electronics/Cabling [[Media:FCAL2_Readout_Layout.pdf]]
 
** Use HV and signal patch panels inside dark room
 
** Use HV and signal patch panels inside dark room
 
** HV cables are 48 wire with PCB mounted connector, 35 cables
 
** HV cables are 48 wire with PCB mounted connector, 35 cables

Latest revision as of 15:31, 6 April 2022

Meeting Time and Place =

Wednesday April 6,2022 2pm

  • Teams meeting on calendar
  • Invited - Sasha Somov, Eugene, Stephanie, Keith Harding, Tim, Fernando, Chris Stanislav

Agenda

  • Review minutes from last meeting 2 years ago https://halldweb.jlab.org/wiki/index.php/March 9,_2022_FCAL_2_Design_Meeting
  • Design/Fab status
    • Drawing Package checked (most)
    • 3D Model complete (except details to be discussed below)
    • Chillers in house
    • Ready to start fabricating some components
  • Monitoring System
    • In Testing?
  • Electronics/Cabling Media:FCAL2_Readout_Layout.pdf
    • Use HV and signal patch panels inside dark room
    • HV cables are 48 wire with PCB mounted connector, 35 cables
    • 1600 signal connectors on patch panels
    • Labyrinth on north and south exterior walls?
  • Tungsten absorber


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 annealed 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 50um 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 = ?
  • Cooling
    • Design for 10°C
    • Designed for 4KW
    • 11 parallel circuits for each chiller
    • 2 manifolds (BL, BR)
    • potted copper tubes into aluminum conduction cooling blocks
    • Cooling of center tube is removeable to service bases
    • Entire Dark room is an insulated refrigerator
    • 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
    • Keeping existing Cockroft-Walton bases

Minutes and Action Items