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Bent Laue crystal anatomy: new insights into focusing and energy‐dispersion properties
Author(s) -
Qi Peng,
Shi Xianbo,
Samadi Nazanin,
Chapman Dean
Publication year - 2021
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s1600576720016428
Subject(s) - bent molecular geometry , optics , ray tracing (physics) , diffraction , physics , beam (structure) , synchrotron , monochromatic color , x ray optics , crystal (programming language) , refraction , synchrotron radiation , dispersion (optics) , x ray , materials science , computer science , composite material , programming language
X‐ray Laue‐type monochromators are common and essential optical components at many high‐power X‐ray facilities, e.g. synchrotron facilities. The X‐ray optics of bent Laue crystals is a well developed area. An incident X‐ray beam penetrating a bent Laue crystal will result in a diffracted beam with different angles and energies. There is a need for a way of organizing the rays that allows one to sort out the energy and spatial properties of the diffracted beam. The present work introduces a new approach for describing the general behaviour of bent Laue crystals from a ray‐tracing point of view. This quasi‐monochromatic beam approach provides an intuitive view of bent‐crystal diffraction and leads to deeper understanding. It explains the energy and spatial properties of common and special cases of bent Laue optics, predicts phenomena that can improve energy‐dispersion‐related X‐ray imaging techniques and provides a theoretical framework that makes ray‐tracing simulation easier to realize.