惯性约束聚变黑腔内等离子体界面处的动理学效应及其影响  

Characteristic and impact of kinetic effects at interfaces of inertial confinement fusion hohlraums

作　　者：蔡洪波[1,2] 张文帅 杜报 燕鑫鑫 单连强[3] 郝亮[1] 李志超[3] 张锋[3] 龚韬 杨冬[3] 邹士阳[1] 朱少平[1,4] 贺贤土 Cai Hongbo;Zhang Wenshuai;Du Bao;Yan Xinxin;Shan Lianqiang;Hao Liang;Li Zhichao;Zhang Feng;Gong Tao;Yang Dong;Zou Shiyang;Zhu Shaoping;He Xiantu(Institute of Applied Physics and Computational Mathematics,Beijing 100094,China;HEDPS,Center for Applied Physics and Technology,Peking University,Beijing 100871,China;Laser Fusion Research Center,CAEP,Mianyang 621900,China;Graduate School,China Academy of Engineering Physics,Beijing 100088,China)

机构地区：[1]北京应用物理与计算数学研究所,北京100094 [2]北京大学应用物理与技术中心高能量密度物理数值模拟教育部重点实验室,北京100871 [3]中国工程物理研究院激光聚变研究中心,四川绵阳621900 [4]中国工程物理研究院研究生院,北京100094

出　　处：《强激光与粒子束》2020年第9期93-103,共11页High Power Laser and Particle Beams

基　　金：科学挑战专题项目(TZ2016005);国家自然科学基金项目(11975055,U1730449)。

摘　　要：在惯性约束聚变物理研究中,等离子体界面处的动理学效应及其时空演化特性近年来受到重点关注,因为它会显著影响激光能量沉积、激光等离子体不稳定性、辐照对称性、黑腔和内爆性能等诸多物理。准确描绘等离子体特征界面附近的动理学效应是惯性约束聚变物理设计的基本需求,也是高能量密度物理中的具有挑战且未完全解决的问题。重点回顾近几年来本团队围绕等离子体动理学效应及其影响开展的一些研究工作:(1)聚变黑腔中金等离子体与靶丸冕区等离子体边缘处的电场结构及其加速的高能离子对内爆对称性的影响;(2)激光光路上高Z-低Z等离子体界面处的电场产生机制及其导致的反常离子扩散对激光等离子体不稳定性的影响;(3)等离子体中电磁场结构的质子照相反演。In the study of inertial confinement fusion physics,the characteristics,temporal and spatial evolution of kinetic effects at the plasma interfaces attract crucial interest recently because they can affect the laser energy deposition,laser plasma instabilities,radiation asymmetry and implosion performance.A successful design of inertial confinement fusion requires the accurate description of the temporal and spatial evolution of the kinetic effects at the plasma interfaces,which is also a very challenging and unresolved problem in high energy density physics.In this paper,we will review our recent researches on the kinetic effects and their influence on laser plasma instabilities and implosion performance:(1)Electrostatic field arisen in the hohlraum wall/ablator(or the low-density fill-gas)interpenetration region will result in efficient acceleration of high energy ions,which is a source of the low-mode asymmetry of the implosion capsule.(2)The mechanism for the electrostatic field generation and the anomalous mix in the interpenetration layer at the high-Z and low-Z plasma interface and its effects on the laser plasma instabilities.(3)Reconstruction of the spontaneous electric and magnetic fields through proton radiography.

关 键 词：惯性约束聚变 动理学效应 电磁场时空演化 内爆对称性 激光等离子体不稳定性 质子照相反演 

分 类 号：O539[理学—等离子体物理]