Sep 20, 2011 Readout

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Teleconference Time: 11:00 a.m. EST

  • ESNET 8542553 and EVO session
  • JLab Phone: in CC F326 is 757-269-6337 (usual room)
  • JLab Phone in CC L207 is 757-269-7084
  • Phone in the Regina Videoconference Suite is 306-585-4204
  • Athens Phone: in Christina's office is 011-30-210-727-6947
  • Phone:
    • +1-866-740-1260 : US and Canada
    • +1-303-248-0285 : International
    • then use participant code: 3421244# (the # is needed when using the phone)
    • OR from www.readytalk.com type access code 3421244 into "join a meeting" without the # (you need java plugin)

Items for followup from previous meeting

Documents to Review

Tentative Agenda

  1. Announcements
  2. Review of Action Items
  3. Monitoring Update (Athens)
    • Christina is not available, but sent this note: We have ordered some alternative LED's to be tested as soon as things turn to normal [i.e. following the student occupation].
  4. USM Update
  5. SiPM update
  6. Electrical/cooling (Elton)
  7. Geometry and light guides
  8. Simulations
  9. Talks at the collaboration meeting
    1. Suggested topics are: Updates (Fcal and Bcal), beamtest (Kei), SiPMs/Bcalreadout, Monitoring (Athens), segmentation (David).
    2. Oct. 7, 14:30 - Title -- Speaker
    3. Oct. 7, 15:00 - Title -- Speaker
    4. Oct. 7, 15:30 - Title -- Speaker
    5. Oct. 7, 16:00 - Title -- Speaker

Minutes

Attending: Alam, Hayk, Will, Iñaki (USM); Elton, Yi, Ivan, Tim, Beni, Eugene (JLab); Zisis, Andrei (UofR).

  1. Announcements
    • All coils are down in the hall. About half of the yoke steel is in the hall, expect all moved by the end of the week. Next week, Lockwood will begin erection of the first two iron pieces.
  2. Review of Action Items
  3. Monitoring Update (Athens)
    • Christina is not available, but sent this note: We have ordered some alternative LED's to be tested as soon as things turn to normal [i.e. following the student occupation].
  4. USM Update
    1. Electronics (Alam)
      • Two full boards now assembled.
      • Testing of components and preparing for assembling other boards.
      • Controller for the test is now working
      • Fixing some mechanical misalignments
      • All components close to ready for a complete test
    2. Sofware/control (Hayk)
      • Database and C++ classes to read dB ready.
      • Clode developed for communication with DB
      • Web server packages are almost ready
      • Once server is up, data will be available online.
      • New: Use bar codes attached all MPPCs, which can be read with a cell phone for access to the server database. Using a Google identification application.
      • Soon should be able to use the dark box and check out the full procedure
      • Ricardo should be read to give an update in a couple of weeks.
  5. SiPM update
    • 500 production units arrived from Hamamatsu. Only a couple have been tested with the setup to test individual sensors. Results show consistency with first article samples.
    • Drawings for the design of the production setup are being made. Expect to have the setup running by mid October.
    • Zisis: Gain uniformity measurements on the 10 first article samples (shipped to UofR) have been completed and student is compiling the results.
    • Eugene: Inquired about cosmic-ray tests of production modules. Zisis reminded us that the Bcal prototype module (production fabrication, but not all layers straight) was used for determining the light output, although a readout with photomultipliers was used. The next step would be to instrument a production module with the final readout system including SiPMs and check out with cosmics. This will likely be done at JLab. Zisis: For a possible beam test, a small module could be used, including possibly the fabrication of a short (e..g. 50cm long) module just for use in the beam test.
  6. Electrical/cooling (Elton)
    • Layout of boards including the additional layer have been completed. Switching between the 3-3-4 and 1-2-3-4 configurations is not trivial, so we need to make a decision on the granularity before boards are fabricated.
  7. Geometry and light guides
    • Bids for the light guides are in and JLab hopes to award the contract this fiscal year.
  8. Simulations
    • David has completed a new draft of GlueX-doc-1801, detailing simulations of the time resolution for various readout granularities. He shows that there is an improvement of about 20-30% in the timing resolution from the nominal 3-3-4 configuration and the 1-2-3-4 configuration.
  9. Talks at the collaboration meeting
    1. Suggested topics are: Updates (Fcal and Bcal), beamtest (Kei), SiPMs/Bcalreadout, Monitoring (Athens), segmentation (David).
    2. Oct. 7, 14:30 - Title -- Fcal update (Matt)
    3. Oct. 7, 15:00 - Title -- Bcal update (Andrei)
    4. More - Title -- USM update (?)
    5. Oct. 7, 15:30 - Title -- Fcal Beamtest (Kei)
    6. Oct. 7, 16:00 - Title -- SiPMs/Bcalreadout (Elton?)
    7. More - Title -- Bcal Segmentation simulations (David)