Difference between revisions of "December 10, 2019 FCAL Insert Design Meeting"
From GlueXWiki
(→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 |
− | * | + | ** 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 == | == 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