May 7, 2009 Readout

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Teleconference Time: 11:00 a.m. EST

  • EVO session
  • Phone:
    • +1-800-377-8846 : US
    • +1-888-276-7715 : Canada
    • +1-302-709-8424 : International
    • then enter participant code: 00406402# (remember the "#")

Items for followup from previous meeting

  1. Bcal section
    • Zisis will get a quote from Ross machining to find out how much it would cost to polish a segment (both ends)
    • Will will send a shipping address.
  2. JLab to determine how many fibers could be spared now to use in this project.
  3. Elton to determine availability of FM pmts (either from the project for loan) or for purchase from Hamamatsu
  4. Schedule: refinement of schedule by Will with input from Elton and others.

Reference Documents on DocDB

  1. FM PMTs in magnetic field
    1. Athens work: GlueX-doc-712
    2. FIU work: GlueX-doc-1173
  2. Light guide work
    1. Regina work: GlueX-doc-651
    2. Indiana work: GlueX-doc-850, GlueX-doc-1045
  3. Calorimeter Performance
    1. Beam Tests: GlueX-doc-1071, GlueX-doc-845

Documents to Review

Bcal signal shapes and sizes GlueX-doc-1244

Modeling CNC machine 1

Modeling CNC machine 2

Updated schedule for FM PMT design, from USM

Agenda and Minutes

  1. Announcements
  2. Review of Action Items
    • Zisis: Currently Ross machining is providing estimate for the full Bcal production. When this is complete they will request an estimate for diamond cutting a section.
    • Jan (Alberta) has inquired whether they should ship back the small module used for machine tests. UofR would like it back, but Jim should be consulted before shipment.
  3. Preliminary report from USM
    • Updated schedule (Will)
      • Will requested suggestions on how to quantify prototype tests.
      • Zisis will provide information on the bcal testing for reference.
      • Suggestions on a good light source are welcome.
      • A sketch of the test setup would be useful to elicit more feedback.
    • Light collection (Will)
      • Will requested feedback to his estimate that is 3 times lower than numbers Elton has been using.
    • Prototyping planning (Sergey)
      • R5505-70 17.5 mm, 26 mm OD vs. H6152-70 17.5 mm, 31 mm OD
        • [Note by Elton] The first is the pmt proper, the second is the pmt and assembly. Hamamatsu strongly recommends the assembly because the divider is tricky for this tube.
      • CNC modeling mill selection (see documents linked above). USM is setting up to become a specialty shop.
      • Purchases are underway, including Hamamatsu 7525 pmt, normal pmt with the same photocathode as the FM pmts.
      • Ordered 250 wavelength shifting 1mm fibers, which can be used together with a blue LED.
    • KLOE energy resolution (Sergey)
      • 1.64% vs. 2.4% KLOE 'b' term (5.5% vs. 6.1% in the ‘a’ term)
    • Summary of student activities on Hall D alternative readout project (Alam)
    • New lab spaces are being assigned to the Project (Alam)
  4. Review timeline
    • Materials for prototyping
  5. Bcal signals (Elton)
  6. MOU with USM