Analysis and Simulation on Properties of Target Materials in Inertial Confinement Fusion

实现高效率的内爆是惯性约束聚变的主要问题。在燃料靶的内爆过程中，我们有一个中间耦合的等离子体，澄清这种等离子体的各种性质是至关重要的。这些靶的另一个重要方面是，在它们的结构中包含了相当数量的重离子作为推进器或篡改者。当重离子或多或少地从燃料中分离出来时，我们有一个系统，由这些离子组成的强耦合部分与具有弱耦合或中等耦合的燃料等离子体之间具有界面。当它们与燃料混合时，我们有一种离子混合物，其中电荷数较大的离子主要决定包括辐射转移在内的传输性质。在这个项目中，我们通过理论分析和数值模拟，研究了1.具有中强耦合的均匀等离子体的性质，特别是离子混合物的性质，2.强耦合等离子体的界面，以及3.等离子体中重离子的内部结构(电子态)。未来最大的问题可能是将这些结果应用于现实的大规模内爆模拟，并优化靶结构和束流轮廓。

The main problem in the inertial confinement fusion is to achieve a high efficiency of implosion. We have a plasma with intermediate coupling in the course of implosion of fuel targets and it is essential to clarify various properties of such plasmas. Another important aspect of these targets is the fact that a considerable amount of heavy ions are included in their structure as a pusher or a tamper. When heavy ions are more or less separated from fuels, we have a system with interfaces between the strongly coupled part composed of these ions and the fuel plasma with weak or intermediate coupling. When they are mixed with fuels, we have a mixture of ions where ions with larger charge numbers mainly determine transport properties including radiation transfer. In this project, we have investigated, through theoretical analyses and numerical simulations, 1. properties of homogeneous plasmas with intermediate or strong coupling, especially those of ionic mixtures, 2. interfaces of strongly coupled plasmas, and 3. internal structure (electronic states) of heavy ions in plasmas.The largest problem left for the future may be to apply these results in realistic, large scale simulations of implosion and to optimize the target structure and the beam profile.