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    User name dwang

    Log entry time 20:41:13 on October10,2009

    Entry number 294299

    keyword=compton bkg rate too high

    beam is back, but the photon background rate is too high. High voltage keeps tripping. set high voltage to be 1500, but it still won't stay long there. The background rate is about 1400 Hz/uA with HV at 1500.


    FIGURE 1