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    User name V. Sulkosky

    Log entry time 09:59:15 on June 03, 2009

    Entry number 278674

    This entry is a followup to: 278655

    keyword=Re: Pion Rejector Plots

    Both Werner and Doug commented that "Showercounter in the lsft arm look
    a bit strange at least the individual spectra."

    I looked into this and found the causes of the problem:

    1) When the golden run was updated last night for the left HRS with run
    3128, the pion rejector configuration file was not updated.

    2) The pion rejector configuration file was using run 2942, which was the
    previous kinematic: P0 = 2.277 GeV/c and theta = 14.5 degrees. The
    current kinematic is P0 = 2.32 GeV/c and theta = 12.5 degrees.

    3) Previously we were taking 2 kHz of T3, but now we are only taking
    100 Hz of T3. Plus the left HRS histograms have a cut that do not
    include T5 or T6.

    All this conspired to make the pion rejector individual ADC's to look a
    lot worse than before. The total energy over momentum plot does not
    include an event type cut; hence, it still looks reasonable.

    I have updated the pionrejL.cfg code to use run 3128 for the golden run.
    I have also now included T5 and T6 in the event type cut for the left
    HRS detector histograms.

    A copy of this log entry has been emailed to: zhaobo,camsonne,ellie,miham,gjin