[Halld-pid] TOF Meeting Minutes, May 9, 2013

[Mark M. Ito]

Find the minutes at 
https://halldweb1.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_May_9,_2013#Minutes 
and below.
   __________

GlueX TOF Meeting, May 9, 2013
Minutes

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

Announcement

    There will be a TOF assembly and installation meeting, Friday, May 10,
    at 10 am in ARC 428. FSU will participate via video-conference.

Collaboration Meeting Schedule

    We looked over the schedule for Session IIIb. Paul will give the TOF
    report at the meeting. Chuck offered to prepare representative drawings
    for Paul's presentation. The offer accepted.

Review of last TOF bi-weekly meeting

    We reviewed the [31]minutes from the April 25 meeting.

HV Board Loan from Hall B

    Mark spoke to Sergey Boyarinov and was told that Hall B has lots of
    spare 1450 series HV boards. They will not be using them for CLAS12.
    Paul indicated that FSU could use two. Mark will arrange shipment to
    FSU.

Invoice Backup Info

    Mark spoke to Kathleen Jones and she has contacted Emily Nerona of FSU.
    FSU will start work this week on providing the more detailed
    information we agreed on at the Readiness Review for the current and
    past invoices.

Construction Updates

      * The replacement for the counter with a poor attenuation length
        arrived.
      * After the last meeting there was an exchange on the email list. FSU
        proposed that PMTs should be matched with scintillators as well as
        to each other. This requires all of the scintillator to be measured
        before gluing to PMTs.
      * Scintillator testings has continued. Seventy eight are done, 14
        left to go. They should all be done in day or two.
      * All of the scintillators measured since the last meeting have
        acceptable attenuation length.
      * Visual inspection of the bars revealed on counter with a few small
        bubbles and some with minor dings and scratches, probably received
        during packing at Eljen. These imperfections have been noted but
        are not expected to affect performance.
      * In addition to the counters that Eljen warned us about, those short
        by 1/8 inch, some of the counters were measured at about 1/16 inch
        short. Again this should not effect the mechanics of mounting the
        counters. Each module has a center mark. If all marks are aligned
        in the frame then these differences should be split between the two
        ends.
      * Ian and Randall made new tool to make the creasing of the ESR
        easier. It is a roller that presses the material into the corner of
        a long channel.
      * Three bars were mistakenly wrapped with the protective transparent
        film still on the scintillator. Surgery was done to remove the film
        and the procedures will be changed to make sure that it does not
        happen again.
      * There is a new plan to use the gluing stand to do nine counters at
        a time rather than five. This is consistent with the capacity of
        the original design. Eight standard counters and one half-width
        counter can be accommodated at once. The next batch should be
        started today.
      * Students are coming back from their post-semester break and
        full-time shifts should start Monday. This week there were some
        students helping with light guide attenuation tests.

Invoicing Changes and Status

    Mark created a [32]wiki page to track invoices from FSU to JLab (wiki
    account required to view).

Installation Plan and Document

    Paul reviewed the [33]shipping plan (standard GlueX username and
    password required) they are developing at FSU. In particular he showed
    a design of the shipping container. Four modules are packed into a
    container.

Channel Labeling Scheme

    David Lawrence is working on the software channel labeling scheme based
    on Fernando's channel assignments. We need to get the scheme for the
    TOF and give him comments.

Simulation Geometry Status

    The Monte Carlo still does not have the split counters (half-width) in
    the default configuration. Beni will look into what it takes to put
    them in.

    Retrieved from
"https://halldweb1.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_May_9,_2013"

References

   31. 
https://halldweb1.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_April_25,_2013#Minutes
   32. 
https://halldweb1.jlab.org/wiki/index.php/Private:FSU_Construction_Invoices
   33. 
http://hadron.physics.fsu.edu/wiki/index.php/Module_Storage_and_Shipping_Plan#Shipping_Plan

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