In situ investigation of the dynamic response of energetic materials using IMPULSE at the Advanced Photon Source

The mechanical and chemical response of energetic materials is controlled by a convolution of deformation mechanisms that span length scales and evolve during impact. Traditional methods use continuum measurements to infer the microstructural response whereas advances in synchrotron capabilities and...

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Bibliographic Details
Published in:Journal of physics. Conference series 2014-01, Vol.500 (14), p.142028-8
Main Authors: Ramos, K J, Jensen, B J, Iverson, A J, Yeager, J D, Carlson, C A, Montgomery, D S, Thompson, D G, Fezzaa, K, Hooks, D E
Format: Article
Language:English
Subjects:
Continuums
Deformation mechanisms
Diagnostic systems
Dynamic response
Energetic materials
Experiments
Explosives
Gas guns
Impulses
Phase contrast
Photons
Physics
Single crystals
Spatial resolution
Synchrotrons
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Summary:The mechanical and chemical response of energetic materials is controlled by a convolution of deformation mechanisms that span length scales and evolve during impact. Traditional methods use continuum measurements to infer the microstructural response whereas advances in synchrotron capabilities and diagnostics are providing new, unique opportunities to interrogate materials in real time and in situ. Experiments have been performed on a new gas-gun system (IMPact system for Ultrafast Synchrotron Experiments) using single X-ray bunch phase contrast imaging (PCI) and Laue diffraction at the Advanced Photon Source (APS). The low absorption of molecular materials maximizes x-ray beam penetration, allowing measurements in transmission using the brilliance currently available at APS Sector 32. The transmission geometry makes it possible to observe both average lattice response and spatially heterogeneous, continuum response (1-4 um spatial resolution over ~2 × 2 mm area, 80 ps exposure, 153 ns frame-rate) in energetic materials ranging from single crystals to plastic-bonded composites. The current work describes our progress developing and using these diagnostics to observe deformation mechanisms relevant to explosives and the first experiments performed with explosives on IMPULSE at APS.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/500/14/142028