23 November 1999 Characterization of multifiber polycapillary x-ray collimating optics
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Abstract
Polycapillary collimating optics collect x rays produced by a point source over a wide solid angle (as large as 10 - 15 degrees cone angle) and a large energy bandwidth, and provide a quasi-parallel beam with a small divergence (a few milliradians). These optics are emerging as important tools in materials analysis, medical imaging, x-ray lithography and protein crystallography. Results of measurements carried out on three multi-fiber polycapillary x-ray collimating optics are described. Parameters influencing efficient employment of these optics, such as transmission versus photon energy, output beam uniformity, and divergence are characterized. Monte Carlo simulations based on ray-tracing geometrical optics are compared with experimental performances to extract additional information.
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Sushil D. Padiyar, Hui Wang, Mikhail V. Gubarev, Walter M. Gibson, Carolyn A. MacDonald, "Characterization of multifiber polycapillary x-ray collimating optics", Proc. SPIE 3767, EUV, X-Ray, and Neutron Optics and Sources, (23 November 1999); doi: 10.1117/12.371106; https://doi.org/10.1117/12.371106
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