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    User name jpchen

    Log entry time 14:04:50 on April24,2012

    Entry number 378454

    keyword=bleed-throuth measurement: tiny

    Bleedthrough measurment:
    Cosmic (Hall A slit closed), T3=15 Hz,
    Hall C leakage (Hall A laser off, slit=14), T3=130Hz.
    With Hall A=50 nA, T3=31 KHz.

    The leakage from Hall C = (130-15)/(31,000-15)=0.37%