[Halld-pid] Time-of-Flight Meeting Minutes, February 27, 2019

[Mark Ito]

Folks,

Please find the minutes here 
<https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_February_27,_2019#Minutes> 
and below.

   -- Mark

______________________________


    Minutes, GlueX TOF Meeting, February 27, 2019

Present:

  * *FSU: * Sasha Ostrovidov
  * *JLab: * Thomas Britton, Mark Ito (chair), Simon Taylor, Beni Zihlmann

There is a recording of this meeting <https://bluejeans.com/s/KyqSx/> on 
the BlueJeans site. Use your JLab credentials to access it.


      Review of minutes from the February 13 meeting

We went over the minutes 
<https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_February_13,_2019#Minutes>. 


  * Thomas did the ML training on Ashley's labeling. It does well,
    though it could benefit from a larger training sample for some
    low-probability cases. Still it is 95 to 96% accurate. He will
    present some slides next time.
  * The slides that Ashley Ernst showed at last week's collaboration
    meeting on Richard's simulations of the shield had received another
    iteration from Richard beyond what was shown at the last meeting.
    Both conditions were done without the DIRC[?].


      DIRC "Shielding"

Sasha showed a slide 
<https://halldweb.jlab.org/wiki/images/7/7f/Tof-rates-dirc-nodirc.png> 
where he plotted the ratio of scaler rates in the horizontal TOF 
counters between two runs, with-DIRC and before-DIRC, with-DIRC rates in 
the numerator, before-DIRC in the denominator. Note that the inner four 
counters had their HV turned of during the with-DIRC run. The shadow of 
the DIRC is clearly visible. He will be doing further studies to extend 
these results.


      Upgrade Plan

Sasha reported that Paul Eugenio has been ordering material for 
prototype light guides.

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  * This page was last modified on 27 February 2019, at 17:04.

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