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    User name R. Michaels

    Log entry time 01:22:02 on February20,2009

    Entry number 262209

    keyword=BB deadtime fluctuations

    Watching datamon, the deadtime is normally 3% at 10 uA, but I
    see some huge excursions (fig 1). The time I captured this
    corresponded to the time marked "deadtime" in fig 2.
    The top plot shows beam current and the bottom plot shows
    the accepted rate (L1A). If L1A drops while beam is stable
    it is due to deadtime.

    This is related to the other halogs on this topic.

    FIGURE 1

    FIGURE 2