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

18th APS-SCCM; 24th AIRAPT

Ramos, K.J.^1 ; Jensen, B.J.^1 ; Iverson, A.J.^3 ; Yeager, J.D.^1 ; Carlson, C.A.^3 ; Montgomery, D.S.^1 ; Thompson, D.G.^1 ; Fezzaa, K.^2 ; Hooks, D.E.^1

Los Alamos National Laboratory, Los Alamos

NM

87545, United States^1

APS, Argonne National Laboratory, Argonne

IL

60439, United States^2

National Security Technologies LLC, Los Alamos

NM

87544, United States^3

关键词: Advanced photon source;    Bonded composites;    Deformation mechanism;    In-situ investigations;    Molecular materials;    Phase-contrast imaging;    Spatial resolution;    Transmission geometries;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/500/14/142028/pdf
DOI  :  10.1088/1742-6596/500/14/142028

来源: IOP

【 摘 要 】

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.