BLTWG Meeting 11/25/2019

Organization

• Time: 11:30 EDT
• JLab meeting room: A110, Hall D counting house
• 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. Photon beam polarization
   • Processing of 2018 TPOL data - Michael D.
   • Systematics studies with 750um converter data, 2018 data - yet to come
   • Update on hadronic asymmetries
   • TPOL readout at high rate - Sasha
3. Tagging accidentals estimation
   • plan for tagger intensity scans - Richard
4. Priority issues for immediate focus
   1. tagger energy scale adjustment - Sasha, Richard
   2. evaluation of beam flux systematic error (spectrum, normalization) - any
5. Preparation for the Fall run
   • changes needed after gluonXX os upgrade - Richard
   • hot check-out
     • TAGH - Sasha
     • TAGM - Richard
     • TPOL - Mike
     • TAC - Sascha
     • PS - Sascha
     • active collimator - Richard, Alexandre
     • upstream profiler - Hovanes
     • goniometer - Hovanes
6. GlueX NIM paper discussion
   • GlueX NIM paper documentation
7. Diamond radiator status
   • new diamond procurement - nothing to report
8. Any other business

Notes

from Michael Dugger:

Where I am at with the 2018 polarizations: I almost have all of the 75 micron convertor files for the Spring 2018 and Fall 2018 runs. There are fewer than 100 individual files that are missing. I have run a preliminary analysis with the files available and everything looks OK. I have not encountered any unforeseen issues. I expect to have the finalized polarizations given to the collaboration within 2 weeks from now. I'll report on this during the next beamline meeting.

Take care, Michael