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Figure 6
Method of evaluating brilliance transfer (BT) for a simple model two-dimensional system. (a) Sketch of the system, consisting of a moderator of height m on the left, illuminating a sample of height s at a distance L. (b) The corresponding acceptance diagram. The blue parallelogram shows the area of phase space incident on the sample. The yellow rectangle shows the area of phase space (beam height and divergence interval) for which we wish to evaluate the BT. The intersection of the two areas is outlined in red.

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APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
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