April 6, 2022 FCAL 2 Design Meeting
From GlueXWiki
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
- 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