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Design of Cylindrical Implosion Experiments to Demonstrate Scale-Invariant Rayleigh-Taylor Instability Growth
High Energy Density Physics ( IF 1.6 ) Pub Date : 2020-05-21 , DOI: 10.1016/j.hedp.2020.100831
J.P. Sauppe , S. Palaniyappan , J.L. Kline , K.A. Flippo , O.L. Landen , D. Shvarts , S.H. Batha , P.A. Bradley , E.N. Loomis , B.J. Tobias , N.N. Vazirani , C.F. Kawaguchi , L. Kot , D.W. Schmidt , T.H. Day , A.B. Zylstra , E. Malka

Radiation-hydrodynamics simulations are used to design laser-driven cylindrical implosion experiments to directly measure hydrodynamic instability growth in convergent geometry. Designs for two different size targets, varying in radial dimension by a factor of three, are presented. A set of beam pointings and powers are identified for each scale design that result in a nearly axially uniform implosion of an embedded marker layer. The implosion trajectories are shown to be scale-invariant between designs, with nearly identical scaled acceleration profiles. Linear theory and radiation-hydrodynamics simulations predict that Rayleigh-Taylor instability growth of an azimuthal perturbation, machined on the inner surface of the embedded marker, is also scale-invariant between designs.



中文翻译:

证明内尺度不变的瑞利-泰勒不稳定性增长的圆柱内爆实验设计

辐射流体动力学模拟用于设计激光驱动的圆柱内爆实验,以直接测量会聚几何体中流体动力学的不稳定性增长。提出了两个不同尺寸目标的设计,这些目标的径向尺寸变化了三倍。为每种比例尺设计确定了一组光束指向和功率,从而导致嵌入的标记层几乎轴向均匀地内爆。爆破轨迹在设计之间显示为比例不变的,具有几乎相同的比例加速曲线。线性理论和辐射流体动力学模拟预测,在嵌入式标记的内表面上加工的方位角扰动的瑞利-泰勒不稳定性增长在设计之间也是尺度不变的。

更新日期:2020-05-21
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