General Meeting Summary 1/17/19

NPS COLLABORATION MEETING - 1 FEBRUARY

• Discussion draft agenda

• reduce talk time
• leave breaks - need ~1hour for lunch

• Discussion presentation template for ERR related talks

EXPERIMENT READINESS REVIEW (ERR)

• Discussion of draft charge

• Items that need more detailed discussion are points 4, 5, 7, 8, and 9

• Point 4: define pieces and responsibilities
• Point 7: need generated radiation levels, submit preliminary radiation assessment documentation?
• Point 8: Readiness for calorimeter analysis
• Point 9: Documentation (RSAD, COO, ESAD, OSP) - OSP probably for magnet and calorimeter, define what is needed and who will be responsible

• Action items:

• Have preliminary drafts of documentation
• Prepare task list for 1 Feb collaboration meeting

• ERR dates - send suggestions for dates in frame March-April to Patrizia

MAGNET UPDATE (Bogdan)

• Magnet ready, water lines have been connected

• Power supply - plan s to energize within next week

FRAME UPDATE (Carlos)

• Good progress on assembly of modules (2 x 2)

• improved assembly/disassembly mechanics and procedure, e.g. captive screw that will stay attached to the frame and not fall when trying to disassemble
• still looking into some details of attaching fiber, e.g. glue to either crystal or frame

• Design of PCB boards is complete and ready for production

• LEDs on board, short fiber to crystal, control LED by flat cables
• signal connectors are one end SMA (similar size to LEMO, but more complicated to plug in/out) and LEMO on other end
• HV connectors are Ficher (smaller than regular SHV)

• Access to PMTs improved

• boards slide like curtain to left/right - can almost access PMTs by hand from the back, but might need to optimize distance

• Cooling

• chilled plates around calorimeter crystals
• cooled air in space between crystal and PCB - this space is crowded with many cables, poor air flow - difficult to cool

• Temperature gradient crystals

• will have probes in the box to measure temperature
• discussing fan performance with vendor
• isolation from room - boundary condition air

• Time frame - start construction in second half of the year and finish early next year.

• Funds availability - will confirm on 1 Feb

CRYSTALS (Vladimir)

• Completed visual inspection of ~90% of first batch of CRYTUR crystals

• NO rejections

• Planning to measure tolerances for frame in next weeks

Crystal lengths are same for SICCAS and CRYTUR, but area slightly different

• Action Item: make matrix where Crytur and SICCAS crystals would go - send numbers to Hamlet

• Prototype: commissioning complete, will present preliminary results at collaboration meeting

NEXT MEETING: COLLABORATION MEETING 1 FEBRUARY