[Halld-pid] Time-of-Flight Meeting Minutes, February 14, 2013

[Mark M. Ito]

Find the minutes at 
https://halldweb1.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_February_14,_2013#Minutes 
and below.
   __

GlueX TOF Meeting, February 14, 2013
Minutes

    Present:
      * FSU: Paul Eugenio, Sasha Ostrovidov
      * JLab: Chuck Hutton, Mark Ito (chair), Tim Whitlatch, Beni Zihlmann

Mini-TOF Status

    There was a minor problem with the construction drawings for the frame
    at FSU: they assumed counters 255 cm long (an old dimension) when the
    actual dimension is 254. This was easily remedied by slotting the
    attachments holes for the appropriate frame parts. The drawings at
    JLab.

    There was a slight interference with the clamps and the curved part of
    the light guide. FSU simply trimmed an edge of the the clamp to
    proceed. This change also needs to be fed back into the drawings at
    JLab.

    Since the end of the scintillators, while being glued, are almost 10
    feet above the floor, there is a scaffolding being built next to the
    gluing fixture to allow access for work. Some additional design effort
    is going into personal safety while mounting the scaffold as well as
    general mechanical stability.

    An old scintillator bar, from previous prototypes, has been cut up to
    serve as blanks for the two additional half-length counters needed to
    complete the mechanical assembly, opposite the actual first-article
    modules. They will be wrapped. A decision on whether to instrument them
    has not been made.

Construction Status

    Four modules are glued and ready for wrapping. More will be glued
    today. Wrapping will start tomorrow.

    Maurizio Bertoli, the construction manager for this project, has
    started work at FSU.

PMT Testing

    All 194 PMTs have have gone through gain testing. All are good. There
    are few that Sasha would like to re-measure so the latest standard
    procedure can be applied to them.

Scintillator Testing

    Sasha reported that the results presented last time had a labeling
    error, and that the modules with the reduced attenuation length were
    the two half-length modules, contrary to expectations. The issue is
    being investigated. Beni agreed to consult on this matter.

Readiness Review

    The readiness review is scheduled for Friday, March 8. Beni, Chuck, and
    Bruce Lenzer will be traveling to FSU.

Contract

    Paul and Mark have been discussing the system for invoicing and
    progress reporting now that contract work had started. The procedure
    needs to be systematized a bit.

    Retrieved from
"https://halldweb1.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_February_14,_2013"

-- 
Mark M. Ito, Jefferson Lab, marki at jlab.org, (757)269-5295