Difference between revisions of "October 9, 2019 FCAL Insert Design Meeting"
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= Meeting Time and Place == | = Meeting Time and Place == | ||
| − | Wednesday Oct, 9 | + | Wednesday Oct, 9 2:00 pm |
At Jefferson Lab, room TED 2504 | At Jefferson Lab, room TED 2504 | ||
| Line 38: | Line 38: | ||
== Minutes and Action Items == | == Minutes and Action Items == | ||
| − | * | + | * Discussed Tungsten absorber |
| − | ** | + | ** No decision on coverage, still at 1.5 crystals |
| − | * | + | * Monitoring System |
| − | + | ** Need to order diamond end mill - Tim | |
| − | ** | + | ** 1mm fibers for test |
| − | ** 1mm | + | ** 2 Test samples made, 15cm square with 6mm 45 degree bevel |
| − | ** | + | * Cooling of blocks - 2.1 KW needed |
| − | ** | + | ** Inner cooling ring move to be in line with outer to keep area behind lead-glass module clear for repairs - Keith |
| − | * | + | * Support structure and assy sequence |
| − | ** Need to | + | ** Discussed sequence and shimming in detail |
| − | ** | + | ** Need to develop a more detailed plan to show next meeting - Keith/Tim |
| − | * | + | ** Screen shots for Eugene - Keith |
| − | ** Fernando | + | * electronics patch panels DS of crystal pmts |
| − | ** | + | ** Some more discussion on panels - not much more detail given |
| − | ** | + | ** Fernando needs geometry info for cable lengths - Keith |
| − | ** | + | ** Need more info on connectors/patch panel - Fernando |
| − | ** | + | * Discussed Additional testing for the final design |
| − | * | + | ** Josh continuing tests Brazing of PMT module straps |
| − | * | + | ** Sasha wishes to assemble a new 9 module array for magnetic field testing |
| − | * | + | *** 18mm diameter light guides are needed - josh found some on Amazon - tim will order |
| − | ** | + | *** 6mm longer with 50 micron larger ID mag shield steel needed - Submitted to machine shop [[Media:1020_shield.pdf]] |
| − | ** | + | *** additional mu metal shields needed (same as previous - 350 microns) - Tim ordered Due Oct 18- |
| − | ** | + | *** Have steel shields annealed - Tim looking into it >900C |
| − | ** | + | * Need fixture for testing crystals in hall (PS beam right) |
| − | ** | + | ** 12 at a time |
| + | ** Josh assembling a fixture | ||
| + | ** Aluminum support clip fabrication - Stephanie | ||
| + | ** Josh to supply stp file for aluminum base plate - Stephanie to make dwg | ||
| + | ** Josh to supply stp file for copper soldering head - Stephanie to make dwg | ||
| + | ** Steel shielding cage - Tim sketched, need to check overall design - Stephanie/Tim | ||
| + | ** Need to make a stand - Tim | ||
== Action items == | == Action items == | ||
Latest revision as of 14:36, 23 October 2019
Meeting Time and Place =
Wednesday Oct, 9 2:00 pm 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/September_25,_2019_FCAL_Insert_Design_Meeting
- Discuss Tungsten absorber
- Cover 1.5 crystals ok?
- Rohacell supported
- Monitoring System
- Use 1/2" Acrylic sheet with 45 degree angles on edges
- Testing plan
- 1mm fibers
- 15cm square with 6mm 45 degree bevel
- Cooling of blocks - 2.1 KW needed
- 2 Chillers like those used for BCAL ($16K ea)
- 4 water to air Heat exchangers around crystal area
- 9 parallel circuits for each chiller
- potted copper tube into aluminum blocks
- Cooling of inner tube - removable plate
- Proposed manifold similar to BCAL - needs to clear for FCAL module removal
- Support structure and assy sequence
- electronics patch panels DS of crystal pmts
- Discussed Brazing of PMT module straps and new mag field tests
- Sasha wishes to assemble a new 9 module array for magnetic field testing
- 18mm diameter light guides are needed - josh found some on Amazon - tim will order
- 6mm longer with 50 micron larger ID mag shield steel needed - Submitted to machine shop Media:1020_shield.pdf
- additional mu metal shields needed (same as previous - 350 microns) - Tim ordered Due Oct 18-
- Have steel shields annealed - Tim looking into it >900C
- Sasha wishes to assemble a new 9 module array for magnetic field testing
- Discuss test fixture for PMTs in beam
- Need to fabricate steel case - Media:Steel_shield.pdf
- need to fabricate support structure - Tim
- Need to fabricate feedthru panel - Josh/Tim
- need to fabricated aluminum base plate - Josh/Tim
Minutes and Action Items
- Discussed Tungsten absorber
- No decision on coverage, still at 1.5 crystals
- Monitoring System
- Need to order diamond end mill - Tim
- 1mm fibers for test
- 2 Test samples made, 15cm square with 6mm 45 degree bevel
- Cooling of blocks - 2.1 KW needed
- Inner cooling ring move to be in line with outer to keep area behind lead-glass module clear for repairs - Keith
- Support structure and assy sequence
- Discussed sequence and shimming in detail
- Need to develop a more detailed plan to show next meeting - Keith/Tim
- Screen shots for Eugene - Keith
- electronics patch panels DS of crystal pmts
- Some more discussion on panels - not much more detail given
- Fernando needs geometry info for cable lengths - Keith
- Need more info on connectors/patch panel - Fernando
- Discussed Additional testing for the final design
- Josh continuing tests Brazing of PMT module straps
- Sasha wishes to assemble a new 9 module array for magnetic field testing
- 18mm diameter light guides are needed - josh found some on Amazon - tim will order
- 6mm longer with 50 micron larger ID mag shield steel needed - Submitted to machine shop Media:1020_shield.pdf
- additional mu metal shields needed (same as previous - 350 microns) - Tim ordered Due Oct 18-
- Have steel shields annealed - Tim looking into it >900C
- Need fixture for testing crystals in hall (PS beam right)
- 12 at a time
- Josh assembling a fixture
- Aluminum support clip fabrication - Stephanie
- Josh to supply stp file for aluminum base plate - Stephanie to make dwg
- Josh to supply stp file for copper soldering head - Stephanie to make dwg
- Steel shielding cage - Tim sketched, need to check overall design - Stephanie/Tim
- Need to make a stand - Tim
