The development of the VISAR, and its use in shock compression science
The development of the VISAR, and its use in shock compression science
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VISAR 的发展及其在冲击压缩科学中的应用
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
L. M. Barker
中科院分区：
文献类型：
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作者：
L. M. Barker
VISAR的前身，包括位移和速度干涉仪技术的冲击仪器。1972年VISAR的发展使激光干涉测量法适用于非常广泛的冲击波实验。随着1974年VISAR数据简化方程的改进，VISAR被证明可以产生精度优于1%的速度测量，时间分辨率约为2 ns。VISAR的功率在铁的13 GPa相变的平板冲击研究中得到了证明。测量了冲击压缩铁中的速率效应，并与理论进行了关联，确定了卸载应力-体积路径，以前所未有的精度揭示了反向相变应力。回顾了VISAR的后期改进，包括透镜延迟VISAR（Amery）、推挽VISAR（Hemsing）、ORVIS（Bloomquist和谢菲尔德）、线VISAR（Hemsing）、固定腔VISAR（Sweat等）、“永不搜索边缘”VISAR（巴克）和多波束成像。
VISAR predecessors are described, including the displacement and velocity interferometer techniques for shock instrumentation. The advance to the VISAR in 1972 made laser interferometry applicable to a very wide range of shockwave experiments. With a 1974 refinement of the VISAR data reduction equation, the VISAR was shown to produce velocity measurements with better than 1% accuracy, and with time resolution to about 2 ns. The power of the VISAR was demonstrated in a plate impact study of the 13 GPa phase transition in iron. Rate effects in shock compressed iron were measured and correlated with theory, and the unloading stress-volume path was determined, revealing the reverse phase transition stress to unprecedented accuracy. Later improvements in VISARs are reviewed, including the lens delay VISAR (Amery), the push-pull VISAR (Hemsing), the ORVIS (Bloomquist and Sheffield), the line VISAR (Hemsing), the fixed-cavity VISAR (Sweat, et al.), the “never-search-for-fringes” VISAR (Barker), and the multi-bea...