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    User name rsholmes

    Log entry time 21:10:34 on November 15, 2005

    Entry number 160315

    This entry is a followup to: 160313

    keyword=Position drift before septum crash

    Attached plot shows beam drifting in y during the run just prior to the septum crash. By contrast, in prior runs, y positions were holding steady at -1.2 (4A) and -1.55 (4B) mm. (The oscillations in 4Bx are typical and presumably not real.)




    Beam position monitors vs window number -- 4Ax, 4Ay on top , 4Bx, 4By on bottom