BLTWG Meeting 03/28/2016

Organization

• Time: 11:30 EDT
• 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. Update on slow locks and fast feedback - Alexandre D.
3. Updated results from CHESS run in Feb. 2016 - Richard J.
   • GlueX diamond inventory
4. Complementarity of different ways of extracting beam polarization - discussion
   • Justin's rho asymmetry study
   • Update on polarimeter results for 750 and 75 micron converters
   • initial triplet polarimetry results for 50 and 20 micron diamonds
   • CBSA fits using Ken's phenomenological model (1, 2, 3) and followup comment
   • Utility of three different methods for complete understanding - Richard J.
   • What is needed to get a reliable polarization from CBSA? - discussion
5. Differences between event rates in PARA and PERP polarization - discussion
   • early observations - Lubomir P.
   • correlation with beam steering - Lubomir P.
   • correlation with rates in the microscope - Richard J.
6. Ideas for improved mounting schemes for thin diamonds - discussion
   • alternate mounting schemes - Ken L., Yang G.
   • comments in response - Richard J
7. Blue glow from diamond in beam (sometimes) - discussion
   • there it is! - Hovanes E.
   • there it isn't - Reinhard S.
8. Beam normalization studies with the TAC - Hovanes
   • Studies with 5mm collimator and 3.4mm collimator.
   • very preliminary look at PS acceptance*efficiency*thickness for 750um Be and 5mm collimator (A.Somov)
9. Update on TAGH calibration and performance - Nathan S.
10. Update on the TAGM calibration and performance - Alex B.
11. Update on diamond radiator fabrication - Brendan P.
12. Update on polarimetry - Michael D./Nathan S.
13. Update on the pair spectrometer - Sascha S.
    • PS acceptance determination and photon flux
14. Any other business