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    User name R. Michaels

    Log entry time 04:41:39 on July 8,2010

    Entry number 330761

    This entry is a followup to: 330740

    keyword=strange timing affects ADC gate

    More on the strange timing peaks.

    It seems the L-HRS ADC gates may be shifted by a bad amount for
    the abnormal timing peaks -- the ones at larger times in S2m.
    See fig 1. The gas Cerenkov gets chopped.

    Meanwhile, these timing shifts do not affect the ADC gate
    timing on the R-HRS, see fig 2. This is using 2 ARM analysis
    and is consistent with halog 330748. Statistics not that
    great, I'll admit.

    So we're looking for a bad module or an effect that is

    a) intermmittent, not many runs affected

    b) affects L-HRS ADCs and TDCs but not R-HRS.

    FIGURE 1

    FIGURE 2