High intensity x-ray diffraction in transmission mode employing an analog of Poisson's spot

Evans, P. ORCID: 0000-0001-9831-1461, Rogers, K., Chan, J.W., Rogers, J. and Dicken, A. ORCID: 0000-0002-0558-3773, 2010. High intensity x-ray diffraction in transmission mode employing an analog of Poisson's spot. Applied Physics Letters, 97 (20). ISSN 1077-3118

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Abstract

Poisson’s spot is a diffraction phenomenon producing an intensity maximum at the center of the geometric shadow of circular opaque objects. In an analog of the Poisson spot experiment, we show that a tubular cone of x-rays incident upon a crystalline sample produces diffraction spots or foci, corresponding to Bragg maxima within a transmission shadow. We discuss the beam geometry and the intensity gain recorded at the foci in transmission mode. We describe the geometric growth and decay of the foci over a linear axis with the aid of a movie sequence synchronized with the plotting of a diffractogram. The mean signal of a small central area in each successive camera image provides the intensity data for the diffractogram.

Item Type:	Journal article
Publication Title:	Applied Physics Letters
Creators:	Evans, P., Rogers, K., Chan, J.W., Rogers, J. and Dicken, A.
Publisher:	AIP (American Institute of Physics) Publishing
Date:	2010
Volume:	97
Number:	20
ISSN:	1077-3118
Identifiers:	Number Type 10.1063/1.3514235 DOI
Rights:	Copyright 2010 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Divisions:	Schools > School of Science and Technology
Record created by:	EPrints Services
Date Added:	09 Oct 2015 10:06
Last Modified:	09 Feb 2018 14:34
URI:	https://irep.ntu.ac.uk/id/eprint/7881

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