BLTWG Meeting 06/09/2020

Organization

• Time: 1:30 EDT
• JLab meeting room: CEBAF Center F324-325
• Connecting: detailed instructions are here
  • H.323 ip address: 199.48.152.152
  • web browser: https://bluejeans.com/536076821
  • phone: 408-740-7256 or 888-240-2560
• Conference id: 536076821
• Present:

Agenda

1. Announcements
2. Beam flux
   • artifact seen in b1 cross section - Ahmed
3. Polarimetry
   • TPOL polarimetry update
   • Progress on CBSA calculations - Jamie
   • Polarimetry from hadron decays: PΣ for spring 2020
     • Shift of beam spot on diamond: around runs 71730 [1] and 71860 [2]
     • Change of AC position: run 71992 [3], [4]
4. Offline analysis
   • coordinated updates to ccdb for 2020 spring run
     • hodoscope/energy_calib
     • microscope/scaled_energy_range
     • microscope/integral_cuts
   • dead channels database update for spring run
   • updating energy_calib for earlier run periods
5. Photon beam systematics studies
   • formation of Photon Flux Systematics Task Force -- discussion
   • tagging accidentals scaling factors for spring 2020 -- Beni
   • beam flux normalization studies -- Sasha
6. Ongoing investigations
   • energy-dependent beam profile from fast raster -- Richard
   • variation in collimator transmission -- updates?
   • converter thickness systematics -- 'updates?
   • other topics?
7. Any other business