February 5, 2021 DIRC

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Meeting Information

GlueX DIRC Meeting
Friday February 5, 2021
10:00 am, ET
Remote only

Connection Using Bluejeans

  1. To join via Polycom room system go to the IP Address: (bjn.vc) and enter the meeting ID: 846453895.
  2. To join via a Web Browser, go to the page [1] https://bluejeans.com/846453895 .
  3. To join via phone, use one of the following numbers and the Conference ID: 846453895
    • US or Canada: +1 408 740 7256 or
    • US or Canada: +1 888 240 2560
  4. More information on connecting to bluejeans is available.


  1. Announcements
    • Collaboration Meeting: Feb 17-19. DIRC update talk by Bill planned for Wed afternoon.
    • TIPP Conference: abstracts due Feb 7 (Sunday)
  2. Mirror prototype test plan (All)
    • Discussion of prototypes and ongoing tests (Bill, All)
      • Half-size prototype: test began on Dec 22, inspections Jan 19 and Feb 1 show air gap is maintained over 6 weeks
      • Full-size 3-segment mirror prototypes: test began on Jan 22 with weekly inspections: most recent Feb 1 looks great
      • Top/bottom mirror prototype: plan to begin water test on Monday
    • North mirror box un-installed and inspected: (All)
    • Next steps in mirror process: (Justin)
      • Final modifications to mirror sizes (Justin), then order borofloat (several weeks lead time for previous order)
      • Production mirror assembly planned for clean hood and water tested in Hall D
    • Other thoughts or suggestions?
  3. Diffuser status (Bill)
  4. DIRC commissioning analyses and 2020 studies (All)
  5. AOB