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    User name LeRose

    Log entry time 13:32:25 on June 24, 2010

    Entry number 328117

    This entry is a followup to: 328078


    keyword=Cycling for Q2/3 magnets

    A more detailed analysis of the measurements taken yesterday indicates that by cycling up to 1000 Amps and then back down to 500 Amps, B/I (i.e. field/current) reproduces at the 0.024% level after one cycle and 0.015% after two cycles. Without cycling the variation is as large as 0.57%. The next step is to evaluate how much the optics change with an 0.02% change in a quad.

    A copy of this log entry has been emailed to: bogdanw@jlab.org,vasulk@jlab.org,doug@jlab.org,camsonne@jlab.org

    Figure 1