Conical shell illumination incorporating a moving aperture for depth-resolved high-energy X-ray diffraction

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dc.contributor.authorSpence, Daniel
dc.contributor.authorDicken, Anthony
dc.contributor.authorDownes, David
dc.contributor.authorRogers, Keith
dc.contributor.authorEvans, Paul
dc.date.accessioned2023-02-08T12:30:07Z
dc.date.available2023-02-08T12:30:07Z
dc.date.issued2023-01-16
dc.description.abstractIn many applications, the main limitation of X-ray absorption methods is that the signals measured are a function of the attenuation coefficient, which tells us almost nothing about the chemical or crystallographic nature of objects under inspection. To calculate fundamental crystallographic parameters requires the measurement of diffracted photons from a sample. Standard laboratory diffraction methods have been refined for well over a century and provide ‘gold standard’ structural models for well-prepared samples and single crystals but have little applicability for thick heterogeneous samples as demanded by many screening applications. We present a new high-energy X-ray diffraction probe, which in comparison with previous depth-resolving hollow beam techniques, requires a single beam, point detector and a simple swept aperture to resolve sample signatures at unknown locations within an inspection space. We perform Monte Carlo simulations to support experiments on both single- and multiple-material localisation and identification. The new probe is configured and tested using low-cost commercial components to provide a rapid and cost-effective solution for applications including explosives detection, process control and diagnostics.en_UK
dc.description.sponsorshipThe Royal Society and The Wolfson Foundation RSWF\R1\180012. The Department of Homeland Security (DHS), Science and Technology Directorate, Homeland Security Advanced Research Projects Agency, Explosives Division through the Advanced X-ray Material Discrimination Program (HSHQDC-15-CB0036). Engineering and Physical Sciences Research Council: EP/T034238/1.en_UK
dc.identifier.citationSpence D, Dicken A, Downes D, et al., (2023) Conical shell illumination incorporating a moving aperture for depth-resolved high-energy X-ray diffraction, The Analyst, Volume 148, Issue 5, 7 March 2023, pp. 1123-1129en_UK
dc.identifier.eissn1364-5528
dc.identifier.issn0003-2654
dc.identifier.urihttps://doi.org/10.1039/D2AN01842J
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/19153
dc.language.isoenen_UK
dc.publisherRoyal Society of Chemistryen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.titleConical shell illumination incorporating a moving aperture for depth-resolved high-energy X-ray diffractionen_UK
dc.typeArticleen_UK

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