21 September 2005 Temporally-resolved area-imaged velocimeter system for dynamic materials experiments
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Shocks extending across crystals' grain boundaries can nucleate and grow velocity fluctuations on the order of 5-10% when the shock speeds differ in the adjacent grains. Dynamic materials experiments at the Los Alamos National Laboratory Trident Laser Laboratory aim to examine this phenomenon by temporally- and spatially-resolving free surface velocity over a large region of interest. While line-imaged velocimetry can serve as a quantitative method for examining the velocity fluctuations across a single boundary, it is more desirable to resolve the velocity field around an entire embedded grain. We present a novel diagnostic design that utilizes a four-frame gated-optical-imaging interferometric velocimeter in combination with a streaked line-imaging interferometric velocimeter. This diagnostic will provide high-spatial resolution velocigraphs of a shock as it hits a free surface in multigrain crystals.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Thomas E. Tierney IV, Thomas E. Tierney IV, Damian C. Swift, Damian C. Swift, Billy N. Vigil, Billy N. Vigil, Dennis L. Paisley, Dennis L. Paisley, Sheng-Nian Luo, Sheng-Nian Luo, Randall P. Johnson, Randall P. Johnson, Samuel A. Letzring, Samuel A. Letzring, "Temporally-resolved area-imaged velocimeter system for dynamic materials experiments", Proc. SPIE 5920, Ultrafast X-Ray Detectors, High-Speed Imaging, and Applications, 59200Z (21 September 2005); doi: 10.1117/12.622285; https://doi.org/10.1117/12.622285


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