Mar 24, 2011 Calibration/Monitoring

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Teleconference Time: 08:00 CST (Regina) / 10:00 EDT / 16:00 GMT+2 (Athens)

  • Connection: ESNET

Background information

Action Items

  1. Can George calculate the % deviation from linearity on his plot?
  2. USM should be contacted to send more LGs to Athens: Athens has requested 15 units, 12 for one side and 3 for the opposing side of the baby cal. Regina is working on its request.
  3. Christina will probe Kapos for cabling and other board issues.

Tentative Agenda

  1. MoU Progress
  2. Monitoring system concepts


Attendees: Christina (Athens), Elton (JLab), Zisis (Regina)

  1. MoU Progress
    1. Elton has been pushing the MoU through the concurrence stage at JLab.
    2. Christina identified the officer who will read the MoU before the Vice Rector signs it and that person is expecting the MoU.
  2. Monitoring system evolution: (See Elton's email of March 15, 2011)
    1. Elton's email discussed modifications to monitoring system in order to use CAN bus system (same as for FCAL HV setting) and daisy-chaining. Experience exists within Hall D group.
    2. Changes suggested now seem to require prototyping at the € 8,000 level. Elton is pursuing a source of funds.
    3. Kapos will join us in a subsequent meeting to discuss all issues related to cables, etc.
    4. Fibre layout: Zisis will work with Dan to come up with a sketch which Elton will pass on to Chuck for inclusion in the drawings. (IDEAS dxf file format).
    5. Use 2 x 0.5mm fibres on each LED so that we have 4 SiPMs viewing 2 LEDS (increase redundancy). This idea is in principle decoupled from the board design, Question: how complex will the assembly be since the two fibres go to adjacent LEDs?
    6. Monitoring system concept is mature enough to be presented to CAL WG on Tuesday, March 29. We will work on a proposal to show to the group.