Abstract
An X-ray parabolic refractive axicon, as novel type of beam-shaping optical element, consisting of a refractive lens with a form of the surface represented as a parabolic cone, is proposed and demonstrated. Under coherent X-ray illumination, the axicon generates Bessel-like beam along the optical axis and ring-shaped beam at the imaging distance. A theoretical analysis of the beams formation by the axicons was carried out and corresponding computer simulations were performed. The proposed parabolic axicon was experimentally tested at ID06 ESRF beamline in the X-ray energy range from 10 to 15 keV. Experimentally recorded images of shaped beams are in a good agreement with computer calculations. Future possible applications of the axicon are discussed.
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