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    User name silwal

    Log entry time 05:16:00 on September 18, 2009

    Entry number 290297

    keyword=Beam Position scan

    Asked MCC for the biggest raster they can provide: 11x11 MCC units
    At the target: 6.5x5.0mm

    We moved the beam in +-1 mm in both x and y at BPM4B, which translated to
    roughly the same amount at the target as well.

    Results from the beam position scan from owl shift, Friday sep 18.

    Beam Position rms lumix lumic lumisum lumi(x-c)
    (-1, 4.5) hist 782 750 763 130
    gaus 750 719 732 127
    (-2.5,4.5) hist 827 792 807 132
    (+ in x) gaus 780 746 760 126
    (0,4) hist 793 762 775 130
    (- in x) gaus 755 727 738 128
    (-1,5) hist 805 771 785 135
    (+ in y) gaus 771 738 751 128
    (-1,3) hist 773 743 756 126
    (- in y) gaus 745 718 728 125

    Beam Position det1 det2 detsum det(1-2)
    (-1, 4.5) 5151 5156 3703 7174
    5107 5136 3691 7124
    (-2.5,4.5) 5248 5153 3738 7232
    (+ in x) 5235 5109 3708 7162
    (0,4) 5153 5187 3707 7208
    (- in x) 5125 5166 3687 7178
    (-1,5) 5173 5167 3710 7205
    (+ in y) 5148 5119 3681 7143
    (-1,3) 5222 5199 3718 7304
    (- in y) 5198 5195 3698 7273

    A copy of this log entry has been emailed to: paschke@jlab.org, rom@jlab.org, souder@physics.syr.edu,kkumar@physics.umass.edu, dalton@jlab.org, mcnulty@jlab.org, mercado@jlab.org