[Halld-pid] Time-of-Flight Meeting Minutes, December 1, 2015

[Mark Ito]

Folks,

Please find the minutes below and at 
https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_December_1,_2015#Minutes 
.

   -- Mark
__________________________________


  GlueX TOF Meeting, December 1, 2015, Minutes

Present:

  * *FSU*: Hussein Al Ghoul, Brad Cannon, Paul Eugenio, Sasha
    Ostrovidov, Aristeidis Tsaris
  * *JLab*: Mark Ito (chair), Simon Taylor, Beni Zihlmann


      Announcements

  * Mark performed the*Hot Checkout*procedure and moved the TOF to
    "ready" status on ???. He did not take; data directly for this
    purpose, but consulted with Sasha, who has been taking a lot of
    cosmic data recently and certified that all of the electronic
    channels are showing up in the data stream.
  * Paul responded to Mark aboutLoan TJNAF#44283 to Florida State
    <https://halldweb.jlab.org/talks/2015/fsu_loan.pdf>. FSU would like
    to extend the loan and the request has been submitted to Property.


      Calibration Status FSU

Sasha gave the report. He is done with cosmic data taking. He collected 
180 M events. Of those 100 k have tracks with 5 hit modules or more. The 
JANA reconstruction[?] was losing events without using a custom 
database. This is needed because of timing differences between beam and 
cosmic triggers. He is working on implementing that now.


      Calibration Status JLab

Beni reported on two areas of work.

  * He started looking at equalizing the time bin width of the CAEN
    TDCs. He has code that will measure the relative population of the
    four lowest-order bit patterns, but he is not getting reproducible
    results at present. He is using the new driver from Bryan Moffit to
    access the control registers.
  * He has made some progress on the energy calibration. He is seeing a
    problem where correcting for attenuation (using two exponentials)
    using measured values is not giving good results across the length
    of a given counter. In some cases he is seeing double peaks. More
    study is needed.

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  * This page was last modified on 2 December 2015, at 16:13.


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