BLTWG Meeting 09/15/2020

Organization

• Time: 1:30 EDT
• JLab meeting room: none
• 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

Agenda

1. Announcements
2. Polarimetry
   • TPOL polarimetry update
   • Progress on CBSA calculations
   • Polarimetry from hadron decays
     • First look at Summer 2020 (Alex)
3. Photon beam systematics studies
   • luminosity and flux normalization
   • updates to ccdb energy_calib for earlier run periods -- Sasha
   • support for applying DBeamPhoton energy corrections to REST data
   • tagging accidentals scaling factors -- update?
4. Issues related to the ongoing run
   • TAGM electronics repairs -- Richard
   • fast raster beam spot study -- Richard
5. Ongoing investigations
   • variation in collimator transmission -- marking as resolved
   • converter thickness systematics
   • other topics?
6. Any other business