Abstract
This report describes the use of the MAXRAY raytracing package [1,2] in assessing the design of a focussing mirror for the protein crystallography (PX) station due to be constructed on the storage ring “SIBERIA−2” in Moscow. Focussing optics are required for PX because of the large discrepancy in the size of the diverging synchrotron radiation beam and the protein crystal sample (typically 0.3 × 0.3 × 0.3 mm 3). The efficiency of X-ray collection is investigated as a function of grazing angle, magnification and misalignment error for both toroidal and ellipsiodal mirror forms, and these results are used to recommend a flexible optical arrangement.
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