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Focal construct geometry – a novel approach to the acqusition of diffraction data
Author(s) -
Rogers Keith,
Evans Paul,
Rogers Joseph,
Chan JerWang,
Dicken Anthony
Publication year - 2010
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/s0021889810005248
Subject(s) - optics , diffraction , pencil (optics) , reflection (computer programming) , detector , geometry , point (geometry) , translation (biology) , materials science , physics , mathematics , computer science , chemistry , programming language , biochemistry , messenger rna , gene
This paper presents the first use of a simple novel geometry that enables the measurement of diffractograms from polycrystalline materials through linear translation of a point detector. The geometry is such that intensities from all points around any Debye ring are summed to a single point, and thus coherently scattered X‐rays are harvested efficiently. Data from initial experimental verification of the approach used in transmission mode are presented and the diffractograms compared with their equivalent measured using a pencil beam. Brief discussions of potential modifications in reflection geometry and applications for fibre samples are also provided.