Magnetically accelerated, ultrahigh velocity flyer plates for shock wave experiments
Magnetically accelerated, ultrahigh velocity flyer plates for shock wave experiments
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DOI：
10.1063/1.2084316
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发表时间：
2005-10
影响因子：
3.2
通讯作者：
R. Lemke;M. Knudson;D. Bliss;K. Cochrane;J. Davis;A. Giunta;H. C. Harjes;S. Slutz
中科院分区：
文献类型：
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作者：
R. Lemke;M. Knudson;D. Bliss;K. Cochrane;J. Davis;A. Giunta;H. C. Harjes;S. Slutz
利用20 MA Z加速器产生的强磁场作为脉冲压力源，将金属飞片加速到高速，以进行平板撞击、冲击波实验。最近开发的Z的脉冲整形能力显著增强了这种能力，这使得能够针对特定材料和驱动压力定制峰值电流的上升时间，以避免在加速期间在飞片内形成冲击。因此，可以充分利用可用电流来实现最大可能的磁力驱动压力。用这种方法，已经产生了高达490 GPa的峰值磁驱动压力，该压力无冲击地将850μm铝（6061-T6）飞片加速到34 km scins的峰值速度。我们讨论磁流体动力学（MHD）模拟，用于优化的磁压力为一个给定的传单负载，并确定形状的电流上升时间，排除冲击形成的传单在交流…
The intense magnetic field produced by the 20 MA Z accelerator is used as an impulsive pressure source to accelerate metal flyer plates to high velocity for the purpose of performing plate impact, shock wave experiments. This capability has been significantly enhanced by the recently developed pulse shaping capability of Z, which enables tailoring the rise time to peak current for a specific material and drive pressure to avoid shock formation within the flyer plate during acceleration. Consequently, full advantage can be taken of the available current to achieve the maximum possible magnetic drive pressure. In this way, peak magnetic drive pressures up to 490 GPa have been produced, which shocklessly accelerated 850μm aluminum (6061-T6) flyer plates to peak velocities of 34km∕s. We discuss magnetohydrodynamic (MHD) simulations that are used to optimize the magnetic pressure for a given flyer load and to determine the shape of the current rise time that precludes shock formation within the flyer during ac...