BLTWG Meeting 02/04/2019

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  • Time: 11:30 EDT
  • JLab meeting room: A110, Hall D counting house
  • Connecting: detailed instructions are here
  • Conference id: 536076821
  • Present: Richard J., Ken L., Sasha S., Elton S., Michael D, Alexandre D., Justin S., Alexander A., Stuart F., Eugene C., and Curtis M.


  1. Announcements
  2. Collaboration meeting schedule - discussion
  3. TAGM fiber upgrade results - Richard J.
  4. Beam monitoring issues
    • Update on TPOL polarization results - Michael D.
    • Verifying systematics for energy deposition cuts in TPOL simulation - pending further work
    • Systematics studies with 750um converter data, 2018 data
    • Update on hadronic asymmetries - Justin, Alexander
    • TPOL readout at high rate - Sasha
  5. Priority issues for immediate focus
    1. evaluation of beam flux systematic error (spectrum, normalization) - Justin, Sasha
    2. PS acceptance systematics - Sasha
      Energy corrections
    3. evaluation of polarization systematics (relative, absolute scale) - Michael Richard
    4. finishing the first round CBSA simulations (requested 9 months ago!) - Richard
  6. Upcoming activities
    • removal/remounting of 5 virgin 50um diamonds
    • CLS measurements (next run starting in January, experimental schedule pending)
    • reconfiguration of the tagger for CPP - Richard
  7. Any other business