Difference between revisions of "July 26, 2019 FCAL Insert Design Meeting"
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** 40x40 crystal matrix layout [[Media:40x40_crystal_matrix_2D_layout.pdf]] | ** 40x40 crystal matrix layout [[Media:40x40_crystal_matrix_2D_layout.pdf]] | ||
** Decision to pre-measure stacks of crystals and the existing FCAL to determine bottom row offsets | ** Decision to pre-measure stacks of crystals and the existing FCAL to determine bottom row offsets | ||
| + | ** Shimming of row above crystals may be needed | ||
* Discuss installing Rohacel US of crystals to fill hole and support the lead glass blocks | * Discuss installing Rohacel US of crystals to fill hole and support the lead glass blocks | ||
** Rohacel properties [[Media:Rohacel cut sheet.pdf]] | ** Rohacel properties [[Media:Rohacel cut sheet.pdf]] | ||
Revision as of 12:41, 29 July 2019
Meeting Time and Place
Friday July 26,2019 1pm At Jefferson Lab, room TED 2504
Agenda
- Discuss 40x40 vs 32x32 crystal assembly
- 32x32 crystal matrix layout Media:32x32_crystal_matrix_2D_layout.pdf
- 40x40 crystal matrix layout Media:40x40_crystal_matrix_2D_layout.pdf
- Decision to pre-measure stacks of crystals and the existing FCAL to determine bottom row offsets
- Shimming of row above crystals may be needed
- Discuss installing Rohacel US of crystals to fill hole and support the lead glass blocks
- Rohacel properties Media:Rohacel cut sheet.pdf
- Discuss Tungsten absorber
- How many crystals does it cover?
- How to support it and the blocks above
- Monitoring System
- Is acrylic sheet good enough for crystals?
- How were original FCAL lead glass modules stacked?
- Matt Shepherd stated that they were rotated 90 degrees every other one and bottom row was shimmed as required.
- What should the shim material be
