Laser shadowgraph measurements of electromagnetically-driven cylindrical shock-wave implosions in water
Laser shadowgraph measurements of electromagnetically-driven cylindrical shock-wave implosions in water
复制标题
DOI：
10.1063/1.1535253
复制
发表时间：
2003-02
影响因子：
3.2
通讯作者：
G. Rodriguez;J. Roberts;J. Echave;A. Taylor
中科院分区：
文献类型：
--
作者：
G. Rodriguez;J. Roberts;J. Echave;A. Taylor
在洛斯阿拉莫斯国家实验室的阿特拉斯23兆焦耳z箍缩电容器组设施进行的实验允许电磁驱动的圆柱形冲击波内爆的实验表征。时间分辨的激光阴影术是用来动态成像的一个在水中与二维成像的细节，提供基准结果的数值水代码验证工作在洛斯阿拉莫斯产生的线性目标径向冲击内爆。我们的激光阴影测量捕获了水中冲击波运动的八个独立图像帧，整体空间和时间分辨率分别为±0.25 mm和10 ns。冲击波的径向形状和水体积内的位置的成像允许与数值模拟进行定量比较。对平均半径一维激波轨迹图进行线性拟合，得到水中的激波速度为6.65 mm/μs，相当于马赫数4的激波。测量的冲击波轨迹与数值模拟的比较。
Experiments performed at the Los Alamos National Laboratory’s Atlas 23-MJ z-pinch capacitor bank facility allows for experimental characterization of electromagnetically-driven cylindrical shock-wave implosions. Time-resolved laser shadowgraphy is used to dynamically image an Atlas-generated liner–target radial shock implosion in water with two-dimensional imaging detail that provides benchmark results for numerical hydrocode validation efforts at Los Alamos. Our laser shadowgraph measurements capture eight separate image frames of shock-wave motion in the water, with overall spatial and temporal resolutions of ±0.25 mm and 10 ns, respectively. Imaging of the shock-wave radial shape and position inside the water volume allows for quantitative comparison with numerical simulations. A linear fit to the average radius one-dimensional shock-wave trajectory plot yields a shock speed in the water of 6.65 mm/μs, corresponding to a Mach-4 shock. Comparison of the measured shock-wave trajectory with the numerical ...