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X-ray imaging of subsurface dynamics in high-Z materials at the Diamond Light Source

DOI: 10.1063/1.4904275 DOI Help
PMID: 25554302 PMID Help

Authors: Daniel Eakins (Imperial College London) , David Chapman (Imperial College London)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Review Of Scientific Instruments , VOL 85 (12) , PAGES 123708

State: Published (Approved)
Published: December 2014
Diamond Proposal Number(s): 8863

Abstract: In this paper, we describe a new approach enabling study of subsurface dynamics in high-Z materials using the unique combination of high-energy synchrotron X-rays, a hybrid bunch structure, and a new dynamic loading platform. We detail the design and operation of the purpose-built, portable small bore gas-gun, which was installed on the I12 high-energy beamline at the Diamond Light Source and used to drive compression waves into solid and porous metal targets. Using a hybrid bunch structure and broadband X-ray pulses of up to 300 keV, radiographic snapshots were captured during various dynamic deformation processes in cm-scale specimens, thereby contributing to a more complete understanding of the evolution of mesoscale damage. Importantly, we highlight strategies for overcoming the challenges associated with using high-energy X-rays, and suggest areas for improvement needed to advance dynamic imaging through large-scale samples of relevance to engineering scenarios. These preliminary measurements demonstrate the feasibility of probing highly transient phenomena using the presented methodology.

Journal Keywords: Deformation; Design; Diamonds; Dynamic Loads; Kev Range 100-1000; Light Sources; Porous Materials; Synchrotrons; X Radiation

Subject Areas: Technique Development, Physics, Materials

Instruments: I12-JEEP: Joint Engineering, Environmental and Processing

Added On: 09/01/2015 16:36

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