[Halld-pid] Time-of-Flight Meeting Minutes, April 11, 2013

[Mark M. Ito]

Thanks to Beni for chairing yesterday's meeting and producing minutes. 
Find them at

https://halldweb1.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_April_11,_2013#Minutes

and below.
   __

GlueX TOF Meeting, April 11, 2013
Minutes

    Present:
      * FIU: Sasha Ostrovidov
      * JLab: Chuck Hutton, Beni Zihlmann (chair)

     1. First 5 production paddles have light guides glued to them and are
        now in the wrapping room for wrapping.
     2. The wrapping procedure has been changed slightly such that the
        light guide is wrapped with a separate independent piece of
        reflective material that is templated to fit the light guide
        better. A small strip of aluminium foil is used at the intersection
        between the scintillator and the light guide.
     3. Currently Paul Eugenio is doing the wrapping. He has not yet
        trained students to do the job. And because he is currently at the
        APS meeting the wrapping is on hold.
     4. Maurizio is polishing the light guides. 70 LG have been polished
        already.
     5. 10 out of the 92 production bars have been measured in the dark box
        using UV LED to determine the attenuation length. It was found that
        one paddle had a very small attenuation length. After contacting
        Eljen the manufacturer agreed to send them a new paddle. According
        to them it could be that this paddle came from the edge of a batch
        and probably should never have been shipped in the first place as
        their edge parts are usually discarded.
     6. During the attenuation measurement the paper is completely removed
        from the paddle as the glue of the paper destroys the internal
        reflection and distorts the measurement.
     7. Chuck is working on the TOF-frame design but is not yet finished.
     8. The Mini-TOF stand is still assembled as it is still in used as
        show and tell object for the FSU administration.

    Retrieved from
"https://halldweb1.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_April_11,_2013"

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