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    User name R. Michaels

    Log entry time 00:34:00 on December 2,2007

    Entry number 217714

    keyword=raster adjustment

    Spot++ shows the spot size was approx. 1.6 x 3.9 (fig 1). Run 21379
    MCC calls this "6.3 x 3.9"

    We want 2 x 2.5, so we request 7.9 x 2.5 in MCC-calibrated-units.
    Doing this we obtain 1.7 x 2.2 (fig 2). Run 21380
    Good enough, but I am concerned that there is a big angle
    of the beam in this region, and the extrapolation to the target
    may be uncertain (depends on exact geometry). My point is that
    the ideal picture here is BPMA and BPMB have similar size.
    But ... this would require a retune which is not practical now.

    FIGURE 1

    FIGURE 2