Published in

International Union of Crystallography, Journal of Synchrotron Radiation, 2(25), p. 346-353, 2018

DOI: 10.1107/s160057751800108x

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An X-ray harmonic separator for next-generation synchrotron X-ray sources and X-ray free-electron lasers

This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

An X-ray prism for the extraction of a specific harmonic of undulator radiation is proposed. By using the prism in a grazing incidence geometry, the beam axes of fundamental and harmonics of undulator radiation are separated with large angles over 10 µrad, which enables the selection of a specific harmonic with the help of apertures, while keeping a high photon flux. The concept of the harmonic separation was experimentally confirmed using X-ray beams from the X-ray free-electron laser SACLA.