准球形电磁内爆动力学研究及能量定标关系浅析
发布时间：2018-08-30 15:06
【摘要】：通过改变Z箍缩负载的初始形状和/或质量密度分布,可以实现等离子体的准球形聚心内爆.同柱形箍缩相比,准球形电磁内爆可以将内爆动能集中加载至负载中心较小的空间区域内,获得更高的能量密度,从而在驱动Z箍缩动态黑腔实现聚变点火方面具有潜在优势.准球形电磁内爆的负载和电极结构比柱形Z箍缩更复杂,球面收缩的几何特点使其内爆动力学过程和能量定标关系显著区别于柱形内爆.本文利用解析的薄壳模型推导并分析了理想条件下准球形电磁内爆的动力学行为和能量定标关系,并同二维磁流体力学模拟结果进行了比较.与柱形Z箍缩内爆相比,准球形电磁内爆的动能不仅与驱动电流有关,而且敏感地依赖于负载的初始尺寸.在不显著降低驱动电流和内爆品质的前提下,适当增加负载的初始半径和最大纬度,有利于获得更多的内爆动能和能量加载密度.
[Abstract]:By changing the initial shape and / or mass density distribution of the Z-pinch load, the quasi-spherical core implosion of the plasma can be realized. Compared with cylindrical pinch, quasi-spherical electromagnetic implosion can concentrate the implosion kinetic energy into the space region with smaller load center and obtain higher energy density, which has potential advantages in driving Z-pinch dynamic black cavity to achieve fusion ignition. The loading and electrode structure of quasi-spherical electromagnetic implosion are more complex than that of cylindrical Z-pinch. The geometric characteristics of spherical contraction make the dynamic process of implosion and the energy calibration relationship of spherical implosion distinct from cylindrical implosion. In this paper, the dynamic behavior and energy calibration of quasi-spherical electromagnetic implosion under ideal conditions are derived and analyzed by using the analytical thin shell model, and the results are compared with the results of two-dimensional magnetohydrodynamic simulation. Compared with the cylindrical Z-pinch implosion, the kinetic energy of the quasi-spherical electromagnetic implosion is not only dependent on the driving current, but also sensitively depends on the initial size of the load. Without significantly reducing the driving current and implosion quality, increasing the initial radius and maximum latitude of the load is beneficial to obtain more implosion kinetic energy and energy loading density.
【作者单位】： 北京应用物理与计算数学研究所;中国工程物理研究院核物理与化学研究所;
【基金】：国家自然科学基金(批准号:11405012,91330107,11275030,11675025) 国防基础科研计划(批准号:B1520133015) 中国工程物理研究院院长基金(批准号:2014-1-042)资助的课题~~
【分类号】：O361.3;O441
本文编号：2213443
[Abstract]:By changing the initial shape and / or mass density distribution of the Z-pinch load, the quasi-spherical core implosion of the plasma can be realized. Compared with cylindrical pinch, quasi-spherical electromagnetic implosion can concentrate the implosion kinetic energy into the space region with smaller load center and obtain higher energy density, which has potential advantages in driving Z-pinch dynamic black cavity to achieve fusion ignition. The loading and electrode structure of quasi-spherical electromagnetic implosion are more complex than that of cylindrical Z-pinch. The geometric characteristics of spherical contraction make the dynamic process of implosion and the energy calibration relationship of spherical implosion distinct from cylindrical implosion. In this paper, the dynamic behavior and energy calibration of quasi-spherical electromagnetic implosion under ideal conditions are derived and analyzed by using the analytical thin shell model, and the results are compared with the results of two-dimensional magnetohydrodynamic simulation. Compared with the cylindrical Z-pinch implosion, the kinetic energy of the quasi-spherical electromagnetic implosion is not only dependent on the driving current, but also sensitively depends on the initial size of the load. Without significantly reducing the driving current and implosion quality, increasing the initial radius and maximum latitude of the load is beneficial to obtain more implosion kinetic energy and energy loading density.
【作者单位】： 北京应用物理与计算数学研究所;中国工程物理研究院核物理与化学研究所;
【基金】：国家自然科学基金(批准号:11405012,91330107,11275030,11675025) 国防基础科研计划(批准号:B1520133015) 中国工程物理研究院院长基金(批准号:2014-1-042)资助的课题~~
【分类号】：O361.3;O441
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