Jan 30, 2014 Calorimetry

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Teleconference Time: 11:00 a.m. EST

  • ESNET (Number is 8542553) and SeeVogh session (GlueX Calorimetry meeting room)
  • Phone connection only upon request.
    • +1-866-740-1260 : US+Canada
    • +1-303-248-0285 : International
    • then enter participant code: 3421244# (remember the "#").
    • or www.readytalk.com (and code without the #)

Participant Direct Lines

  • JLab Phone: in CC F326 is 757-269-6460 (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

Items for followup from previous meeting(s)

  1. Provide short summary of constants and their use in determination of the sampling fraction (David)
  2. Provide feedback to Configuration Management document for FCAL and BCAL (Zisis and Matt/John)

Tentative Agenda

  1. Announcements
  2. Action Items
  3. Monitoring
  4. FCAL
    1. (From John, who is snowed in) For the fcal, we ran both 6 crate daqs (north and south) and adjusted the dac settings so that all the pedestals are 100. We are continuing to write to get ready to turn the detector on.
  5. BCAL
  6. BCAL Interlocks see e-mail Elton)
    1. Need to provide input to Dave Butler as he implements the PLC logic and interlock systems for each detector.
    2. Chiller trips (or is off) -> turn HV and LV power off to MPPCs. Note: Probably it is only necessary to turn off the LV, but both are in the same crate, and I prefer turning them both off
      • We need to investigate the capabilities of the chiller to implement this and find a cable to connect to the MPOD crate
    3. For each side of the BCAL: Compute the dew point from temperature and humidity measured in the 4 sensors. Turn LV and HV off if temperature on cooling plate is close to dew point (e.g. less than 5 deg).
      • This calculation would be done in the PLC and the signal sent to the MPOD crate ORed with the signal from the chiller. This probably means it makes sense to send the chiller signals into the PLC and create an output that would shutdown the crate if either condition is satisfied.
    4. Note that shutdown can be relatively slow, as the time scale for environmental changes is ~ minutes.
    5. Note from Fernando: Insure that + and - 5 V power inputs to the BCAL readout is balanced. In particular, if one polarity is lost, the other should be turned off also. This will probably be implemented in EPICs.
  7. Reconstruction and Simulation
  8. TDR update
  9. Calibration
  10. Any other business

Minutes

Attendees: Fernando, Yi, David, Elton, Mark, Sasha, Eugene, Beni, Orlando (JLab); Shawn, Zisis, Andrei (UofR); Christina (Athens)