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Gas gun shock experiments with single-pulse x-ray phase contrast imaging and diffraction at the Advanced Photon
S N Luo1, B J Jensen, D E Hooks
1Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA. sluo@lanl.gov
The Review of Scientific Instruments
|August 3, 2012
Summary
Advanced synchrotron X-rays enable ultrafast, high-resolution imaging and diffraction for shock loading experiments. This study demonstrates the potential for studying dynamic material responses with unprecedented detail.
Area of Science:
- Materials Science
- Physics
- Engineering
Background:
- Shock loading experiments require advanced diagnostics due to the transient nature of dynamic material responses.
- Synchrotron X-ray sources offer high photon flux, coherency, and repetition rates, ideal for in situ studies.
Purpose of the Study:
- To investigate the feasibility of using third-generation synchrotron X-rays for bulk-scale shock experiments.
- To achieve high temporal and spatial resolution in X-ray Phase Contrast Imaging (PCI) and diffraction measurements under dynamic loading.
Main Methods:
- Utilized a gas gun to induce shock loading in bulk materials.
- Employed X-ray Phase Contrast Imaging (PCI) and Laue diffraction techniques at a third-generation synchrotron source (Advanced Photon Source, beamline 32ID-B).
- Characterized X-ray beam properties and experimental setup for dynamic measurements.
Main Results:
- Achieved ultrafast, multiframe PCI measurements with temporal resolution <100 ps and spatial resolution ~2 μm.
- Demonstrated single-pulse dynamic Laue diffraction capabilities for shock experiments.
- Successfully conducted bulk-scale shock experiments using synchrotron-based X-ray diagnostics.
Conclusions:
- Synchrotron-based X-ray experiments show significant potential for addressing complex shock physics problems.
- Identified key technical challenges in image detection, X-ray sources, and dynamic loading for future improvements.
- The study validates advanced X-ray techniques for in situ analysis of dynamic material behavior.
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