[Halld-pid] Time-of-Flight Meeting Minutes, April 24, 2014

[Mark Ito]

Friends,

Please find the minutes below and at

https://halldweb1.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_April_24,_2014

   -- Mark
______________________________________

GlueX TOF Meeting, April 24, 2014
Minutes

    Present:
      * FSU: Paul Eugenio, Sasha Ostrovidov, Aristeidis Tsaris
      * JLab: Hussein Al Ghoul, Eugene Chudakov, Chuck Hutton, Mark Ito
        (chair), Tim Whitlatch, Beni Zihlmann

Collaboration Meeting

      * Hussein will give the TOF report at the collaboration meeting
      * Sasha will give Hussein three slides on calibration.

Installation Update

Location

    Tim reported that the survey numbers have come in. Measurements were
    done with respect to the nominal beam position. The TOF is 1.5 mm high
    and 4 mm beam right in its current position. We noted that the FCAL
    support is several meters back from its data-taking position. Given
    that the beam hole is about 12 cm square, and that another move will be
    necessary, we decided that there is no need to do position adjustments
    now.

    Tim reported that if we do want to move things in the future, motion
    downward is restricted by the frame; things would have to be ground
    down to accommodate that.

    Orientation angles were also measured all are less than about 0.1
    degrees from nominal.

Cabling

    Hussein gave the report and contributed this section.

    Cabling Plan as provided by Fernando's Crew can be found here
[22]http://hadron.physics.fsu.edu/~alghoul/Talks/TOFcablingplan.pdf

    A table of the Cable labels for each module and PMT can be found here
    [23]http://hadron.physics.fsu.edu/~alghoul/Talks/tofmodules.pdf

    IMPORTANT: Modules at positions Y-28 and Y-29 switched positions, this
    was corrected for in the above table. Also module number Y-5 was put in
    the opposite orientation. It wasn't put in the right A->B orientation.
    This was also corrected in the table above. No Problems in the X plane.

    The following pictures were taken on Wednesday April 23rd 2014

    [24]Cables1.jpeg

    [25]Cables2.jpeg

    [26]TofManagers.jpeg

    [27]Label tof.jpeg

Read-Out

    Hussein and Mark will check on the status of the read-out electronics
    and high-voltage supplies.

Trigger

    We discussed this briefly. A self-trigger for the TOF would be best.
    Sascha Somov indicated that that would not be too difficult if the
    conditions are simple, such as a energy sum.

References

   22. http://hadron.physics.fsu.edu/~alghoul/Talks/TOFcablingplan.pdf
   23. http://hadron.physics.fsu.edu/~alghoul/Talks/tofmodules.pdf
   24. https://halldweb1.jlab.org/wiki/index.php/File:Cables1.jpeg
   25. https://halldweb1.jlab.org/wiki/index.php/File:Cables2.jpeg
   26. https://halldweb1.jlab.org/wiki/index.php/File:TofManagers.jpeg
   27. https://halldweb1.jlab.org/wiki/index.php/File:Label_tof.jpeg

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