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    User name paschke

    Log entry time 11:40:46 on October19,2005

    Entry number 157413

    keyword=Beam Intensity noise, Run 5741

    
    There is a lot of beam intensity noise in Run 5741.  I don't think this is a 
    big problem for us, although in general we'd like to be a little cleaner than 
    this... one can worry about non-linearities in position monitors, for instance.
    
    Anyway, our laser still claims to be locked, with reasonable phase noise, 
    according to the MCC general tools screen.  Sometimes this noise appears before 
    the laser loses lock... other times the noise just goes away without 
    intervention.
    
    The apparent multipeak in charge asymmetry is not helicity correlated, and the 
    charge asymmetry and position differences are non-zero in the injector 
    suggesting that there is not a problem with the Pockels cell voltage or 
    helicity sequence.  Just in case you were wondering.
    
    Figure 1 shows asym_bcm1 vs time, Figure 2 shows the charge asymmetry for the 
    run (through event ~75k) and the same plot for events >60000.
    
    
    


    FIGURE 1

    FIGURE 2