Dynamic comparison between the cylindrical and quasi-spherical implosions based on thin-shell models
Dynamic comparison between the cylindrical and quasi-spherical implosions based on thin-shell models
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基于薄壳模型的圆柱和准球形内爆的动力学比较
DOI：
10.1140/epjd/e2019-90373-0
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发表时间：
2019-04
期刊：
影响因子：
--
通讯作者：
Zhenghong Li
中科院分区：
文献类型：
--
作者：
Yanyun Chu;Zhen Wang;Jianmin Qi;Jianlun Yang;Rongkun Xu;Zeping Xu;Fan Ye;Fuyuan Wu;Zhenghong Li
准球形电磁内爆比圆柱形电磁内爆能更有效地产生热的稠密等离子体。基于薄壳模型，对滞止圆柱壳和准球壳的动力特性进行了数值比较。用零维薄壳模型模拟圆柱内爆，用多单元薄壳模型模拟准球形内爆。与圆柱壳情况不同，停滞准球形等离子体壳层的速度、面质量密度和面动能密度随着纬度的增加而增加。在初始半径和载荷线质量跨度较大的情况下，对静止圆柱壳和准球壳的动能密度进行了优化。球形辐射转换器中的动能密度可以是圆柱形辐射转换器中的动能密度的四倍以上。数值结果可以帮助优化峰值电流为1.5 MA、上升时间为80 ns的Z箍缩驱动器的准球形负载参数，本文所述的方法也适用于各种规模的Z箍缩驱动器的负载参数优化。
AbstractThe quasi-spherical electromagnetic implosions are capable of generating hot dense plasmas more efficiently than the cylindrical ones. The dynamic properties of stagnated cylindrical and quasi-spherical shells are compared numerically based on the thin-shell models. The cylindrical implosions are simulated with the zero-dimensional thin-shell model, and the quasi-spherical implosions with the multi-element thin-shell model. The simulated velocity, areal mass density, and areal kinetic energy density of the stagnated quasi-spherical plasma shell increase with the latitude increasing, which is different from the cylindrical case. The kinetic energy densities are optimized for both of stagnated cylindrical and quasi-spherical shells in a quite large span of initial radii and load linear masses. The kinetic energy density in the spherical radiation converter can be over four times as large as that in the cylindrical radiation converter. The numerical results can help optimize quasi-spherical load parameters for Z-pinch driver with peak current of 1.5 MA and rising time of 80 ns, and the method described here is also feasible to optimize load parameters for various-scale Z-pinch drivers.Graphical abstract
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影响因子：
2.2
作者：
T. Nash;M. Derzon;G. Chandler;R. Leeper;D. Fehl;J. Lash;C. Ruiz;G. Cooper;J. Seaman;J. Mc
通讯作者：
T. Nash;M. Derzon;G. Chandler;R. Leeper;D. Fehl;J. Lash;C. Ruiz;G. Cooper;J. Seaman;J. Mc
影响因子：
1.5
作者：
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影响因子：
2.2
作者：
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通讯作者：
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影响因子：
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作者：
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D. Sinars;R. Lemke;M. Cuneo;S. Lebedev;E. Waisman;W. Stygar;B. Jones;M. Jones;E. Yu;J. Porter;D. Wenger
影响因子：
2.2
作者：
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通讯作者：
T. Nash;D. Mcdaniel;R. Leeper;C. Deeney;T. Sanford;K. Struve;J. Degroot