[Halld-pid] Start Counter Meeting Minutes, January 26, 2017

[Mark Ito]

People,

Please find the minutes below and at 
https://halldweb.jlab.org/wiki/index.php/GlueX_Start_Counter_Meeting,_January_26,_2017#Minutes 
.

   -- Mark
_________________________________________


    Minutes

Present:

  * *FIU*: Werner Boeglin, Mahmoud Kamel
  * *JLab*: Mark Ito (chair), Simon Taylor


      Announcements

The Hall will close on Friday. Beam is expected on Monday.


      Review minutes from the last meeting

We looked at minutes from January 
<https://halldweb.jlab.org/wiki/index.php/GlueX_Start_Counter_Meeting,_January_12,_2017#Minutes> 
without significant comment.


      Run Readiness

Mark completed Hot Checkout. There was a problem analyzing data due to 
missing information for the number of samples summed to get a pedestal 
value. We think this is due to using the stand-alone DAC (TI) rather 
than the global system (TS). The code was kludged to make this work, but 
a more permanent solution should be on its way.


      Calibration, Propagation Delay

  * Mahmoud reports getting non-physical values for the speed of light
    in the scintillator.
  * Sean has been looking at the calibrations as well. With the
    previously poor TOF calibrations, he was seeing time shifts in a few
    paddles, presumably from picking the wrong RF bucket (500 MHz). He
    is now re-running the calibrations with recently improved time
    constants for the TOF from Beni.
  * Sean asked that Mahmoud check, for the channels that are not showing
    problems, whether the constants are consistent with those found in
    the Spring. We do not expect propagation delay to change from run to
    run.
  * Werner talked to Eric Pooser about the Start Counter NIM paper. Eric
    is busy with the KPP run in Hall C at the moment; when that is over
    he will have more time.


      Collaboration Meeting

Mahmoud will give an update on the calibration at the meeting next month.

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  * This page was last modified on 27 January 2017, at 13:58.


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

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