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Figure 2
The geometry used in the simulations. The coordination system XY is plotted using solid thick lines. The broken lines mark the propagated beam. The X coordinates of the source, front of the lens and the screen are −xu, x0 and xs, respectively. l and L are the thickness of a single lens and the total length of the compound lens, respectively. Fx and Fy are the intersection points of the refracted ray with the X axis and the screen plane, respectively. The proportions of the objects in the figure do not correspond to the real situation.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 17| Part 5| July 2010| Pages 616-623
doi:10.1107/S0909049510022454
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