[Halld-pid] Start Counter Meeting Minutes, May 2, 2013

[Mark M. Ito]

Find the minutes at 
https://halldweb1.jlab.org/wiki/index.php/GlueX_Start_Counter_Meeting,_May_2,_2013#Minutes 
and below.
    _____

GlueX Start Counter Meeting, May 2, 2013
Minutes

    Present:
      * FIU: Werner Boeglin, Eric Pooser
      * JLab: Chuck Hutton, Mark Ito (chair), Beni Zihlmann

Construction Status

Test Stand

    Eric reports that the test stand design is done and is in the hands of
    the machinist at FIU. A detailed technical note was written in the
    process of specification of the work.

Scintillator

    Eric told us that machining has not started and McNeal. There was a
    glitch in the procurement process. The contract does call for
    completion of the work three weeks APO. The hold-up should be resolved
    soon.

SiPM Read-Out

    At yesterday's GlueX meeting, Fernando reported that the final SiPM
    read-out board design is complete and that a PR is being written for
    construction of the boards. He estimated that they might start coming
    in sometime in May.

    We discussed control of the SiPM bias voltage. There are lines for each
    scintillator (a group of four SiPMs) controlled directly and
    individually from a stand-alone power supply under EPICS control. The
    four SiPMs will have to be matched to accept similar voltages. So each
    ST-2 board has three bias voltage lines on it one for each scintillator
    serviced.

Assembly Fixture

    Eric will turn his attention to this next. He and Chuck agreed to
    exchange drawings as that process goes forward.

Contract

    The technical proposal evaluation was submitted yesterday. Also terms
    and conditions from FIU were received. Legal at JLab has reviewed the
    suggested changes and agrees to them. We are now awaiting award.

Installation Document

    We agreed to discuss the document at the next meeting.

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