[Halld-pid] Time-of-Flight Meeting Minutes, November 7, 2018

[Mark Ito]

People,

Please find the minutes here 
<https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_November_7,_2018#Minutes> 
and below.

    -- Mark

__________________________________


  GlueX TOF Meeting, November 7, 2018, Minutes

Present:

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

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


      Review of minutes from the October 24 meeting

We went over the minutes 
<https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_October_24,_2018#Minutes>. 


  * Tomorrow will be the inaugural meeting of the PID working group at
    10 am.
  * The problem with the signal with strange baseline noise was a loose
    signal cable.
  * Sasha pointed out that one motivation from going from upgrade Option
    #2 to #3 is that in Option #2, the notched out counter would go from
    a rate of 1.0 MHz to 1.8 MHz. Option #3 avoids this problem.


      Calibration Status

Ashley reported that she is still getting problems with time difference 
fits converging. In the sample she showed at the last meeting, 28% of 
the counters did not produce fits. That was with 4 files. She repeated 
the exercise on a run with 77 files and still gets a 5% failure rate.

Beni has produced ROOT files with all files from each run added 
together. He will send the location to Ashley.


      Lucite Shield Geometry

Ashley has created a private version of HDDS with the shield geometry 
she got from Thomas. She is still missing material information for HDPE 
and Lucite.

She is also having trouble getting HDGeant4 to run. She will meet with 
Mark to try and resolve the problem.

Ashley will contact Paul to make sure that the rates he reported at a 
previous collaboration meeting correspond to the arrangement presently 
in the Hall.

Retrieved from 
"https://halldweb.jlab.org/wiki/index.php?title=GlueX_TOF_Meeting,_November_7,_2018&oldid=90114"

  * This page was last modified on 8 November 2018, at 16:31.

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

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