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

From GlueXWiki
Jump to: navigation, search
(→‎Agenda)
(→‎Agenda)
Line 30: Line 30:
 
** use 25um brass straps
 
** use 25um brass straps
 
** 350 um mu metal
 
** 350 um mu metal
−
** [[Media:Module installation procedure.pdf]]
+
** additional 100um mu metal inside
−
* electronics patch panels DS of crystal pmts
+
** separate by 25um kapton
−
* Discuss Testing of soldered assembly and mag field testing
+
 
−
* Discuss test fixture for PMTs in beam
+
*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: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 ==
 
== Minutes and Action Items ==

Revision as of 12:23, 10 December 2019

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: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

Retrieved from "https://halldweb.jlab.org/wiki/index.php?title=December_10,_2019_FCAL_Insert_Design_Meeting&oldid=95379"