Difference between revisions of "BLTWG Meeting 01/09/2019"

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** phone: 408-740-7256 or 888-240-2560
** phone: 408-740-7256 or 888-240-2560
* Conference id: 536076821
* Conference id: 536076821
* Present: <!--Richard J., J. McIntyre, Beni Z., Eugene C., Liping G., Justin S., Alex A., Sasha S., Mike D., and Sebastian L.-->
* Present: Richard J., Dan S., Elton S., Ken L., Michael D, Justin S., Eugene C., Alexandre D.
=== Agenda ===
=== Agenda ===

Revision as of 11:32, 9 January 2019


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


  1. Announcements
  2. TAGM fiber upgrade underway in Tagger Hall - Richard J.
  3. Beam monitoring issues
    • Update on TPOL polarization results from 2016-2017 - 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
  4. Beamline geometry changes in hdds - Richard J
    • small geometry overlaps found in TPOL (support rails, target holders, not critical)
    • larger overlaps found in PS vacuum chamber, beam pipe (not critical)
    • overlap between target assembly and beam pipe (upstream of target, not critical)
    • potentially more serious overlaps between BCAL and FDC (not relevant for this meeting)
    • corrections to simulation geometry now pending on github
  5. Priority issues for next 3 months
    1. evaluation of beam flux systematic error (spectrum, normalization) - Justin, Sasha
    2. evaluation of polarization systematics (relative, absolute scale) - Michael Richard
    3. 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