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    User name Yi/Jin

    Log entry time 13:06:57 on February 23, 2009

    Entry number 262883

    This entry is a followup to: 261636

    keyword=Downstream Target Chamber Pickup coil solved

    We tried different combination of two pairs of target chamber pickup
    coils, pre-amplifiers and lock-in amplifiers. The problem is identified
    to be the problem of downstream pre-amplifier. After replacing the faulty
    pre-amplifier the problem is gone.

    No change

    Switching Lock-in

    Switching Pre-amplifier

    Replaced Pre-amplifier