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    User name X. Zheng

    Log entry time 09:35:32 on April28,2007

    Entry number 200377

    keyword=choppy beam

    beam was a little choppy in the past 45 minutes. BPMX is good always. BPMY is good only when the current is close to 100uA, and is about 0.3 during each ramping.

    FIGURE 1