Longitudinal coherence function in X-ray imaging of crystals | Zendy

Steven Leake | Zendy; Mary Newton | Zendy; Ross Harder | Zendy; Ian Robinson | Zendy

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Longitudinal coherence function in X-ray imaging of crystals

Author(s) -

Steven Leake,

Mary Newton,

Ross Harder,

Ian Robinson

Publication year - 2009

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.17.015853

Subject(s) - optics , coherence (philosophical gambling strategy) , coherence theory , coherence length , coherent diffraction imaging , diffraction , ptychography , bragg's law , physics , beamline , coherence time , crystal (programming language) , materials science , x ray , photon , point spread function , laser , fourier transform , phase retrieval , beam (structure) , condensed matter physics , programming language , superconductivity , quantum mechanics , computer science

The longitudinal coherence function at the Advanced Photon Source beamline 34-ID-C has been measured by a novel method and the coherence length (xi(L)) determined to be, xi(L) = 0.66 +/- 0.02 microm. Three dimensional Coherent X-ray Diffraction (CXD) patterns were measured for multiple Bragg reflections from two Zinc Oxide (ZnO) nanorods with differing aspect ratios. The visibility of fringes corresponding to the 002 crystal direction for each reflection were found to be different and used to map the coherence function of the incident radiation. Partial coherence was found to be associated with amplitude 'hot' spots in three dimensional reconstructions of the crystal structure.

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