[Halld-pid] Start Counter Meeting Minutes, August 8, 2013

[Mark M. Ito]

Folks,

Find the minutes below and at 
https://halldweb1.jlab.org/wiki/index.php/GlueX_Start_Counter_Meeting,_August_8,_2013#Minutes 
.

   -- Mark
_________________________________

GlueX Start Counter Meeting, August 8, 2013
Minutes

    Present:
      * FIU: Lei Guo, Eric Pooser
      * JLab: Chuck Hutton, Mark Ito (chair), Tim Whitlatch, Beni Zihlmann

Review of Minutes from Previous Meeting

    We looked at the [22]minutes from the July 25th meeting, chaired by
    Beni.

    Eric told us that the test stand will be ready by September 9th at the
    latest. The machine shop at FIU has been very busy.

Construction Status

    Eric has re-measured paddles 1, 2, and 3 from the latest batch, now 7
    weeks after the initial measurements. These paddles had been handled
    with the aloe-coated gloves and now in fact show some localized crazing
    in areas where the counters were handled, especially along edges and
    the nose. He showed [23]plots with time resolution and attenuation
    length for these paddles. They show some deterioration of resolution,
    but only from the nose section. Paddles 4 and 5 were not handled with
    the gloves. They will be measured by the end of the week. Eric will
    update his slides to include those measurements.

Contract

    FIU has started purchasing small items under the contract.

Foam Support Material

    The [24]Last-A-Foam product from General Plastics that Hall B used for
    its start counter comes in a wide variety of types and densities within
    each type. Mark talked to Youri Sharabian and Doug Tilles of Hall B and
    was told that Steve Christo is their Last-A-Foam guru. Chuck will
    consult with Steve on the best product for our purposes.

    Retrieved from
"https://halldweb1.jlab.org/wiki/index.php/GlueX_Start_Counter_Meeting,_August_8,_2013"

References

   22. 
https://halldweb1.jlab.org/wiki/index.php/GlueX_Start_Counter_Meeting,_July_25,_2013#Minutes
   23. 
https://halldweb1.jlab.org/talks/2013-3Q/Second_Measurement_Paddle_123.pdf
   24. http://www.generalplastics.com/products/rigid-foams/

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