Difference between revisions of "February 26, 2020 FCAL 2 Design Meeting"
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(Created page with "= Meeting Time and Place == Wednesday February 26, 11:00am At Jefferson Lab, room TED 2504 * Present - Sasha Somov, Josh Crafts, Eugene, Stephanie, Keith Harding, Tim, Fernan...") |
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** separate by 25um kapton | ** separate by 25um kapton | ||
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** Machine Rohacell to measured size | ** Machine Rohacell to measured size | ||
** Pre-assemble acrylic/fibers/Rohacel before installation | ** Pre-assemble acrylic/fibers/Rohacel before installation | ||
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== Minutes and Action Items == | == Minutes and Action Items == | ||
Revision as of 08:36, 26 February 2020
Meeting Time and Place =
Wednesday February 26, 11:00am At Jefferson Lab, room TED 2504
- Present - Sasha Somov, Josh Crafts, Eugene, Stephanie, Keith Harding, Tim, Fernando, Chris Stanislav
Agenda
- Initial design substantially complete
- Drawing Package in check (most)
- 3D Model complete (except details to be discussed below)
- 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
- Electronics/Cabling
- Use HV and signal patch panels inside dark room, any details?
- HV cables are 48 wire with PCB mounted connector
- 1600 signal connectors on patch panels
- Heat load for new bases?
- 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 = ?
- Gasket between module end and acrylic to reduce cross talk
- Cooling
- Design for 10°C
- 2.1 KW needed? Maybe more if new bases are 1W each - 2 chillers?
- 11 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
