December 09, 2021

Meeting Information

GEM @ Stonybrook Meeting
Wednesday December 08, 2021
3:30 pm, ET
Remote only

<! ---

Connection Using Bluejeans

1. To join via Polycom room system go to the IP Address: 199.48.152.152 (bjn.vc) and enter the meeting ID: 846453895.
2. To join via a Web Browser, go to the page [1] https://bluejeans.com/846453895 .
3. To join via phone, use one of the following numbers and the Conference ID: 846453895
   • US or Canada: +1 408 740 7256 or
   • US or Canada: +1 888 240 2560
4. More information on connecting to bluejeans is available.

--- !>

Agenda

1. Announcements
2. Hardware work (All)
   • Latest inspections of mirror prototypes (Bill)
     • October 26th inspection and water changeout
3. Review of 2020 studies (All)
   • Spring and Summer 2020 data production status all complete but ongoing issues with tape and Analysis launches
   • Geometric reconstruction update (Roman)
   • 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 halld_recon 4.16.2 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