[Halld-pid] Start Counter Meeting Minutes, October 31, 2013

[Mark Ito]

Folks,

Find the minutes below and at 
https://halldweb1.jlab.org/wiki/index.php/GlueX_Start_Counter_Meeting,_October_31,_2013#Minutes 
.

   -- Mark
_________________________

GlueX Start Counter Meeting, October 31, 2013
Minutes

    Present:
      * FIU: Werner Boeglin, Eric Pooser
      * 'JLab: Fernando Barbosa, Chuck Hutton, Mark Ito (chair), Tim
        Whitlatch, Beni Zihlmann

Electronics

    Fernando reported that the ST1, ST2, and ST3 boards are all assembled,
    including spares. Testing is the next step; that should be started by
    early December. The board will be tested with the laser in the dark box
    in F117. The expected time for shipment to FIU is early February,
    perhaps January.

    There is a MPOD chassis from Wiener that will supply low voltage and
    bias voltages to the ST3 that will be shipped with the electronics.

    We discussed the nominal plan for testing all channels with the
    complete electronics chain at FIU, including FADCs and TDCs in a VXS
    crate. We all agreed that at this point, it did not make sense to ship
    all of the electronics to FIU and get it set-up. In particular,
    Fernando told us that he is reluctant to part with a VXS crates so
    close to installation time. Werner thought that they could test the
    electronics, in sets, with the equipment already on hand at FIU. He
    might need to borrow discriminators. Also, Beni pointed out that if
    needed we can send cables from the batch that we got from BNL E-852.

    We discussed the location of the ST3 briefly. The cables are long
    enough to accommodate the planned mount on the target installation
    cart. The exact, precise location is yet to be determined.

Construction News

      * Chuck brought in the inner mandrill for show and tell. The aluminum
        tube has a slight taper to ensure that the carbon-fiber-foam
        assembly will slide off easily.
      * The finished inner support should be sent to FIU in mid-January.
        Note that this about when the electronics will be shipped.
      * Purchase orders to Eljen and McNeal for the scintillator have been
        submitted.
      * Eric spoke with Chuck Hurlbut at the DNP meeting last week. Eljen
        has already started production. Eric estimates that they will
        receive everything from Eljen/McNeal in about ten weeks.
      * The scintillator test stand is complete.
      * Eric is getting ready to order materials for the pneumatic plungers
        that will be used to hold modules to the support during assembly.
        He is also preparing to order aluminum foil for wrapping the
        scintillator.
      * Eric gave a presentation showing the latest design for the assembly
        jig and some information from various vendors for the aluminum
        foil. See [31]his slides for details. Since the last meeting he
        received updated drawings from Chuck and now the geometry is
        consistent with everyone's expectations.

    Retrieved from
"[32]https://halldweb1.jlab.org/wiki/index.php/GlueX_Start_Counter_Meeting,_October_31,_2013"

References

   31. https://halldweb1.jlab.org/talks/2013-4Q/ST_Modified.pptx
   32. 
https://halldweb1.jlab.org/wiki/index.php/GlueX_Start_Counter_Meeting,_October_31,_2013

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