[Halld-pid] Time-of-Flight Meeting, March 27, 2014

[Mark Ito]

Folks,

Please find the minutes below and at

https://halldweb1.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_March_27,_2014#Minutes

   -- Mark
______________________________________________________________

GlueX TOF Meeting, March 27, 2014
Minutes

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

Detector Assembly

    [23]Tof.JPG

    Hussein posted the photo above showing recent progress on the TOF in
    the Hall. He described the work.
      * All shield holders have been installed.
      * All of the upper collars (steel magnetic shields) have been
        installed. The bottom ones on the far side (in the picture) are
        next to be done.
      * [24]DMD, a flexible polyester cloth, is being inserted in the space
        between the mu-metal shields and the steel shields to insulate them
        from each other.
      * Hardware for the weldments have been delivered and attached to the
        TOF frame.
      * All of the counters were tested for light leaks; none were found.
      * The cross bars, to add strength during lifting, will be attached
        today or tomorrow.

Survey

    We discussed plans for survey. We would like to have an idea of there
    each counter is in absolute Hall coordinates to about a millimeter or
    so. There have been several informal discussions in the Hall on how to
    do this. The plan is to survey the assembly once it is mounted on the
    FCAL frame. There is a possible difficulty in that line-of-sight to the
    side facing the FCAL might be a bit limited. Tim will talk to the
    Survey guys and form a detailed plan.

Cabling Plans

    Discussions have been going on among Tim, Hussein, Tom Carstens, Nick
    Sandoval, and Fernando Barbosa on cable routes and needed cable trays.
    Cables will be routed below the TOF, not from on top. The goal is to be
    able to move the TOF on its rails while cabled up.

    Paul encouraged us to make sure that the cables do not add unreasonable
    mechanical stress on the phototubes.

Commissioning

    We need to develop plans on the procedure for post-installation
    commissioning.
      * energizing HV
      * looking at signals
      * bringing up the electronics
      * cosmic trigger plan

    Sasha, Beni, and Mark will try to write something down.

BlueJeans

    We will try it for the next meeting.

Public Relations

    Paul asked Mark to look into whether we could get Public Affairs at the
    Lab to help spread the news about the TOF.

    Retrieved from
"https://halldweb1.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_March_27,_2014"

References

   23. https://halldweb1.jlab.org/wiki/index.php/File:Tof.JPG
   24. http://www.pleo.com/fcm/fcm_dmd.htm

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