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Dicken, AJ, Evans, JPO 
ORCID: https://orcid.org/0000-0001-9831-1461, Rogers, KD, Prokopiou, D, Godber, SX, Elarnaut, F ORCID: https://orcid.org/0000-0003-0189-6665, Shevchuk, A, Downes, D ORCID: https://orcid.org/0000-0002-4886-5260 and Wilson, M,
2019.
Confocal energy-dispersive X-ray diffraction tomography employing a conical shell beam.
Optics Express, 27 (14), pp. 19834-19841.
ISSN 1094-4087
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Abstract
We introduce a new high-energy X-ray diffraction tomography technique for volumetric materials characterization. In this method, a conical shell beam is raster scanned through the samples. A central aperture optically couples the diffracted flux from the samples onto a pixelated energy-resolving detector. Snapshot measurements taken during the scan enable the construction of depth-resolved dark-field section images. The calculation of d-spacing values enables the mapping of material phase in a volumetric image. We demonstrate our technique using five ~15 mm thick, axially separated samples placed within a polymer tray of the type used routinely in airport security stations. Our method has broad analytical utility due to scalability in both scan size and X-ray energy. Additional application areas include medical diagnostics, materials science, and process control.
| Item Type: | Journal article |
|---|---|
| Publication Title: | Optics Express |
| Creators: | Dicken, A.J., Evans, J.P.O., Rogers, K.D., Prokopiou, D., Godber, S.X., Elarnaut, F., Shevchuk, A., Downes, D. and Wilson, M. |
| Publisher: | The Optical Society of America |
| Date: | 2019 |
| Volume: | 27 |
| Number: | 14 |
| ISSN: | 1094-4087 |
| Identifiers: | Number Type 10.1364/oe.27.019834 DOI |
| Rights: | © 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement |
| Divisions: | Schools > School of Science and Technology |
| Record created by: | Linda Sullivan |
| Date Added: | 03 Jul 2019 11:22 |
| Last Modified: | 03 Jul 2019 11:22 |
| URI: | https://irep.ntu.ac.uk/id/eprint/37020 |
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