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    User name R. Michaels

    Log entry time 07:07:54 on June10,2001

    Entry number 62756

    This entry is a followup to: 62740

    keyword=re: strange left VDC tdc

    We didn't figure out the strange L-arm VDC TDC spectra (see halog 62740)
    but have some more observations:
    1. The effect is seen in any recent cosmics run. Its seen now because
    the data have a high percentage of cosmics.
    2. The effect is predominantly due to trigger T4.
    3. Other codes like hana, dhist, dataspy, and ha_analyzer see no such
    effect, even with multihit elimination turned OFF.
    4. Only seen on L-arm, not R-arm.
    ---
    Finally, a speculation: maybe when an event is "emtpy" the
    histograms get filled from previous uncleared data ????