Use of synchrotron-based radiography to diagnose pulsed power driven wire explosion experiments.
Use of synchrotron-based radiography to diagnose pulsed power driven wire explosion experiments.
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DOI：
10.1063/1.5055949
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发表时间：
2019-01
期刊：
影响因子：
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通讯作者：
S. Theocharous;S. Bland;D. Yanuka;A. Rososhek;M. Olbinado;A. Rack;Y. Krasik
中科院分区：
文献类型：
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作者：
S. Theocharous;S. Bland;D. Yanuka;A. Rososhek;M. Olbinado;A. Rack;Y. Krasik
我们描述了第一次使用同步辐射探测脉冲功率驱动的高能量密度物理实验。采用帧间距为704 ns、时间分辨率为<100 ps的多帧X射线成像技术，对不同导线结构（包括单根铜线和钨丝、平行铜线对以及铜线x箍缩）在水中的电爆炸进行了诊断。这种实验对包括状态方程研究和高压材料研究在内的各种领域都有很大的兴趣，但是通常在这些实验中使用的光学诊断无法探测水中产生的冲击波背后的区域，以及爆炸材料的内部结构。在欧洲同步辐射装置（ESRF）的光束线ID 19处进行的X射线照相术能够以高达8 μm的分辨率对冲击波的两侧进行成像，并且相位衬度成像可以清晰地观察电流驱动爆炸和冲击波期间的导线结构的细节。这些结果表明，脉冲功率与同步加速器设备结合操作的可行性，以及在冲击波和电线爆炸动力学的研究中的有效技术。
We describe the first use of synchrotron radiation to probe pulsed power driven high energy density physics experiments. Multi-frame x-ray radiography with interframe spacing of 704 ns and temporal resolution of <100 ps was used to diagnose the electrical explosion of different wire configurations in water including single copper and tungsten wires, parallel copper wire pairs, and copper x-pinches. Such experiments are of great interest to a variety of areas including equation of state studies and high pressure materials research, but the optical diagnostics that are usually employed in these experiments are unable to probe the areas behind the shock wave generated in the water, as well as the internal structure of the exploding material. The x-ray radiography presented here, performed at beamline ID19 at European Synchrotron Radiation Facility (ESRF), was able to image both sides of the shock to a resolution of up to 8 μm, and phase contrast imaging allowed fine details of the wire structure during the current driven explosion and the shock waves to be clearly observed. These results demonstrate the feasibility of pulsed power operated in conjunction with synchrotron facilities, as well as an effective technique in the study of shock waves and wire explosion dynamics.