神光Ⅱ装置上间接驱动烧蚀瑞利-泰勒不稳定性实验分析  

Experimental analysis of indirect-drive ablative Rayleigh-Taylor instability on ShenguangⅡ

作　　者：吴俊峰[1] 缪文勇[2] 王立锋[1,3] 曹柱荣[2] 郁晓瑾[1] 叶文华[1,3] 郑无敌[1] 刘杰[1] 王敏[1] 江少恩[2] 裴文兵[1] 朱少平[1] 丁永坤[2] 张维岩[4] 贺贤土[1,3] 

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

出　　处：《强激光与粒子束》2015年第3期69-76,共8页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(11275031;11475034;11274026);中国工程物理研究院院长基金项目(2014-1-040);国家重点基础研究发展计划项目(2013CB834100);中国工程物理研究院科学技术发展基金项目(2014A0202010)

摘　　要：在神光Ⅱ激光装置上开展了一系列辐射烧蚀Rayleigh-Taylor(RT)不稳定性实验。平面靶烧蚀加速飞行轨迹实验结果与LARED-S模拟结果的比较表明腔壁辐射源能流明显小于激光注入孔的辐射能流,且辐射源的非平衡Planckian谱对靶的飞行轨迹和扰动增长有重要影响。实验分别观测到初始小扰动幅度烧蚀RT明显的增长和初始大扰动幅度尖钉变窄和气泡变宽的清晰物理图像。通过提高空间分辨率,实验获得了二次和三次谐波的增长数据,模拟结果与实验结果相符合。神光Ⅱ激光装置上开展的流体不稳定性实验考核了LARED-S程序的一维和二维计算。A series of ARTI experiments have been performed in ShenguangⅡ（SGⅡ）laser facility of China.The simulation results from the LARED-S code for the planar foil trajectory experiment indicate that the energy flux at the hohlraum wall is obviously less than that at the laser entrance hole（LEH）.Furthermore,the non-Planckian spectra of X-ray source can affect the dynamics of the foil flight and the perturbation growth.The images of evident growth of the ARTI initiated by a small-amplitude perturbation and the＂spike-bubble＂pattern initiated by large-amplitude perturbation were observed.The data of the growth of the second and the third harmonics were also obtained by increasing the spatial resolution in the experiments.The simulation results are in general consistent with the experimental results.The reliability of the LARRED-S code has been tested and validated through the comparison with the experiment results.

关 键 词：惯性约束聚变 流体力学不稳定性 瑞利-泰勒不稳定性 

分 类 号：O534[理学—等离子体物理]