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    User name paschke

    Log entry time 11:52:28 on June14,2010

    Entry number 326491

    This entry is a followup to: 326456

    keyword=run 4518: problems due to low bpm12 wires

    Run 4518 also suffered from low bpm12 wires.  Only about 25% of the events at 
    high current passed cuts, caused by beam burp cuts to the low bpm12 wire 
    signals (see cond_pos_burp_e in the pair tree).  Slow drifts of the gain seem 
    to cause the apparently multi-correlated det vs. bpm plots: in runs without 
    these intermittent cuts, the entire blob would be filled in over the course a 
    run.
    
    There was also a strange current instability. See second attachment (gaps are 
    due to bpm12-related pos_burp_e cuts). Does this persist?
    


    FIGURE 1

    FIGURE 2