General Meeting Summary 3/21/19

MAGNET (Charles, Bogdan, Paulo, Rolf)

• Mapper was delivered to JLab - some alignment modifications are being made

• OSP for magnet mapping in test lab almost ready

• Another OSP is needed for the magnet operation in Hall C

• Fringe field considerations on HMS axis - affects optics

• <200G, calculation good enough
• for close approach NPS and HMS configuration without shelf may be better

HV Divider (Fernando, Vladimir, Alex S.)

• Actual amplifier gain may be ~28 (instead of ~10 as thought based on description)

• Modified amplifiers being prepared

• 3x3 prototype for beam tests in Hall D with HV divider with modified amplifier ready

• allows for energy comparison
• goal is to compare different amplifier gains, but also different crystals - start with Crytur

FRAME (Carlos)

• Frame mock-up constructed and being used to determine optimal cable lengths

• PCB assembly ongoing

• Discussion about cable assembly - France or JLab

SIMULATION (Ho San)

• Simulation in good shape - energy resolution, longitudinal and lateral energy deposition

CRYSTALS (Vladimir, Tanja)

• Discussion about inspection of 160 SICCAS replacement crystals

• ~54% pass
• Significant fraction of crystals have nonuniform sizes along crystal and smaller than specs
• File:Visual inspections result.pdf

• Crytur update

• next part of CUA order is on the way (currently have 18/55)
• additional orders placed for 45 by OU and 100(+50) by JLab
• expected capacity for future orders: 120 in calendar year 2019, 180-240/year for the next two years

NEXT MEETING: THURSDAY 4 APRIL AT 9AM (ET)