Evans, P ORCID: https://orcid.org/0000-0001-9831-1461, Rogers, K, Chan, JW, Rogers, J and Dicken, A ORCID: https://orcid.org/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 |
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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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