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    User name V. Sulkosky

    Log entry time 19:49:43 on May 13, 2009

    Entry number 273120

    This entry is a followup to: 273113

    keyword=Re: RHRS Shower ADCs off?

    For the Shower counter, the detector is made up of 75 blocks (15 rows and
    5 columns). The outer two columns see almost no acceptance. Also the
    top of the detector, where part of the elastic tail is now centered also
    sees basically no events. The elastic also has a strong angle dependence
    which I believe we can see in the shower acceptance of the edge blocks.

    Hence the following channels should have little or no real events:

    0-14
    28-30
    44-46
    60-62
    64-78

    If you look closely there are actually five skipped blocks in the
    display. At one point the Shower consisted of 80 blocks (16 x 5). Hence
    ADC channels 15, 21, 47, 63 and 79 are missing (non-existent).

    A copy of this log entry has been emailed to: ellie,riordan