Energy-dispersive X-ray diffraction using an annular beam
Dicken, AJ; Evans, JP; Rogers, KD; et al.Greenwood, C; Godber, SX; Prokopiou, D; Stone, N; Clement, JG; Lyburn, I; Martin, RM; Zioupos, P
Date: 18 May 2015
Article
Journal
Optics Express
Publisher
Optical Society of America
Publisher DOI
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Abstract
We demonstrate material phase identification by measuring polychromatic diffraction spots from samples at least 20 mm in diameter and up to 10 mm thick with an energy resolving point detector. Within our method an annular X-ray beam in the form of a conical shell is incident with its symmetry axis normal to an extended polycrystalline ...
We demonstrate material phase identification by measuring polychromatic diffraction spots from samples at least 20 mm in diameter and up to 10 mm thick with an energy resolving point detector. Within our method an annular X-ray beam in the form of a conical shell is incident with its symmetry axis normal to an extended polycrystalline sample. The detector is configured to receive diffracted flux transmitted through the sample and is positioned on the symmetry axis of the annular beam. We present the experiment data from a range of different materials and demonstrate the acquisition of useful data with sub-second collection times of 0.5 s; equating to 0.15 mAs. Our technique should be highly relevant in fields that demand rapid analytical methods such as medicine, security screening and non-destructive testing.
Physics and Astronomy
Faculty of Environment, Science and Economy
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