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    User name R. Michaels

    Log entry time 19:44:34 on July 03, 2010

    Entry number 329777

    This entry is a followup to: 329693

    keyword=comments about CT*f4 in run 1552

    Rates and such in run 1552
    
    I = 3.5 - 4.0 uA
    T1 = 757 kHz (too high ?)
    T3 = 200 kHz
    T4 randoms expected = R1*R3*60 nsec = 9 kHz for 30 nsec widths.
    T4 observed rate = 31 kHz
    
    Does not seem consistent with a flat observed CT*f4 spectrum. (* = 1,3)
    
    However, as you approach MHz, typically electronics don't work well.
    Also, the S/B goes like 1/I, so try I = 0.4 uA for coincidence search.
    
    It would help a lot if someone could tell us quantitatively what
    S/B to expect for (e- pi+). 
    


    A copy of this log entry has been emailed to: camsonne