Difference between revisions of "December 10, 2021 DIRC"

Revision as of 09:50, 10 December 2021

Meeting Information

GlueX DIRC Meeting
Friday December 9, 2021
10:00 am, ET
Remote only

Connection Using Bluejeans

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Agenda

1. Announcements
2. Hardware work (All)
   • Latest inspections of mirror prototypes: one more planned for December 2021
   • DIRC light leak check instruction
3. Review of 2020 studies (All)
   • Spring and Summer 2020 data production status all complete but ongoing issues with tape and Analysis launches
   • Analytic PDF update (Roman)
   • Geometric reconstruction update:
     • Roman provided latest time and Cherenkov angle corrections that Justin is implementing in halld_recon/ccdb
     • Need to benchmark for upcoming analysis launches over 2020 data
   • Simulation needs:
     • Ad-hoc reduction in photon yields (in mcsmear) to match data: until mirror reflectivity dependence on incident angle is implemented
     • Tagged version of halld_sim with any updates (version set compiled against recon-2019_11-ver01-sim used in data production)
     • Others
   • Action items (from previous meetings)
     • Add incident angle dependence to mirror reflectivity
     • Global alignment issues see slide 15-18 of CM talk (All)
       • Early studies of FDC tilt
       • Possible rotation of magnetic field: impact on extrapolations to DIRC?
       • Generate MC with rotated field and reconstruct with nominal?
     • Reducing background contamination in pi/K samples: KinFit Δχ² between 2pi and 2k reactions, robust sideband subtraction
     • FastDIRC documentation (Yunjie)

1. AOB