[Lowq] Minutes of the eg6 meeting on January 26

[Hovanes Egiyan]

  Minutes of the January 26 meeting


       From Lowqwiki

Present: Rafayel, Yohann, F.-X., Carlos, Stepan, Hovanes, Bayram.

On the phone: Raphael, Marc, Raffaella, Eric

Notes by Hovanes.


    Contents

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    * 1 RTPC Calibrations
      <http://clasweb.jlab.org/rungroups/lowq/wiki/index.php/Minutes_of_the_January_26_meeting#RTPC_Calibrations>
    * 2 DC calibrations
      <http://clasweb.jlab.org/rungroups/lowq/wiki/index.php/Minutes_of_the_January_26_meeting#DC_calibrations>
    * 3 CLAS tracking pattern library file
      <http://clasweb.jlab.org/rungroups/lowq/wiki/index.php/Minutes_of_the_January_26_meeting#CLAS_tracking_pattern_library_file>
    * 4 Other
      <http://clasweb.jlab.org/rungroups/lowq/wiki/index.php/Minutes_of_the_January_26_meeting#Other>

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    RTPC Calibrations

    Raphael presented his plans for RTPC calibrations
    <http://clasweb.jlab.org/rungroups/lowq/wiki/index.php/RTPC_Calibration>
    and discussed various options.

        * Main plan is to use the elastic runs to calibrate the drift
          time parameters.
        * Reducing the noises is very important. Raphael has a list of
          noisy channel.
        * Stepan suggested to use the source to monitor the stability of
          the gains of RTPC.

    Yohann presented his vision for RTPC calibrations
    <http://clasweb.jlab.org/rungroups/lowq/wiki/images/c/c8/PerrinRTPC012610.pdf>.
    The two schemes for drift time parameters calibrations are similar.

        * Yohann had an interesting suggestion to calibrate the gains of
          pads.
        * The proposed solution involved inverting a matrix with 3200
          columns which caused some doubts about about viability of that
          solution.
        * Carlos suggested solving the problem of determining the gains
          using statistical methods, for instance fitting for the 3200
          parameters.

    There will be a separate meeting on Thursday at 9:30am in F228 to
    discuss the details of the RTPC calibrations and software. 


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    DC calibrations

    The problem with the TBID bank was resolved. 
    Proton and local angle cuts produce a good data sample to perform a
    fit. 
    Bayram is close to completing the first iteration. 


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    CLAS tracking pattern library file

    eg6 needs a separate PRLINK file since it has a long target upstream
    of CLAS 
    Stepan has a program and all fields to generate the library. 


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    Other

    We probably need to return three RCU to CERN. Raffaella will find
    out which pieces of electronics which were borrowed should be
    returned, and she will let Stepan know. 

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