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    User name I pomerantz

    Log entry time 01:42:30 on June 29, 2010

    Entry number 329013

    keyword=Cerenkov TDC pairs

    We looked at the time difference between phototube pairs, for events where two phototubes fired. We would like to confirm that the total time difference between two readings is not too large.

    In the figure below I plotted the time difference for Phototube #1 - Phototube #2 Phototube #2 - Phototube #3 . . . for run #1227.

    One can see that the total time difference for a series of pairs does not exceed ~10ns

    The script may be found under: /adaqfs/home/adaq/apex/ipom/cer/cer_2pmt_calib.C

    time difference between phototube pairs