| 拼接聚焦终端在快点火装置上的应用 |
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| 引用本文： | 杨雨川,景峰,李富全,王逍,黄小军,冯斌,罗晖.拼接聚焦终端在快点火装置上的应用[J].强激光与粒子束,2010,22(11). |
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| 作者姓名： | 杨雨川 景峰 李富全 王逍 黄小军 冯斌 罗晖 |
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| 作者单位： | 1. 中国工程物理研究院 激光聚变研究中心， 四川 绵阳 621900； 2. 国防科学技术大学 光电科学与工程学院， 长沙 410073 |
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| 基金项目： | 国家高技术发展计划项目，激光聚变实验室和激光研究中心创新基金 |
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| 摘 要： | 为满足快点火对点火脉冲功率的要求,主要在建和规划中的快点火驱动器均提出类似天文望远镜的拼接技术,实现大口径多路激光的相干聚焦。采用几何光学追迹和傅里叶方法求解拼接聚焦模型,针对抛物面镜的拼接规模和控制精度对焦斑峰值功率的影响进行了理论和数值模拟研究。模拟了2×2,3×3和4×4拼接离轴抛物面镜在一定控制精度下远场焦斑的斯特列尔比,并由正态分布的蒙特-卡罗方法分析了精度误差对斯特列尔比的影响。结果表明,面外旋转角和轴向活塞位移误差分别为1μrad和210.6 nm时2×2结构的焦斑斯特列尔比大于0.8的概率超过60%。
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| 关 键 词： | 拼接抛物面镜 快点火脉冲 峰值功率 控制精度 蒙特-卡罗误差分析 |
| 收稿时间： | 1900-01-01; |
Application of tiling focusing terminal to fast ignition facility |
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| Yang Yuchuan,Jing Feng,Li Fuquan,Wang Xiao,Huang Xiaojun,Feng Bin,Luo Hui.Application of tiling focusing terminal to fast ignition facility[J].High Power Laser and Particle Beams,2010,22(11). |
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| Authors: | Yang Yuchuan Jing Feng Li Fuquan Wang Xiao Huang Xiaojun Feng Bin Luo Hui |
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| Institution: | 1. Research Center of Laser Fusion, CAEP, P. O. Box 919-988, Mianyang 621900, China; 2. College of Opto-Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China |
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| Abstract: | In order to meet the ignition pulse power requirements for fast ignition, fast ignition drivers being constructed and planned mainly adopt similar technology of segmented primary mirrors as the astronomical telescopes, realizing large-aperture multi-channel laser coherent focusing. Using the geometrical optics tracing and Fourier method to solve the model of tiling focusing, the effect of tiling scale of parabolic mirrors and control precision on focal-spot peak power is studied by theory and numerical simulation. Under certain control precision, the Strehl ratio of far-field focal spot is simulated on 2×2， 3×3 and 4×4 tiling scales of off-axis parabolic mirrors, and the effect of precision error on focal-spot Strehl ratio is statistically analyzed by Monte-Carlo method of normal distr |
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| Keywords: | fast ignition pulse peak power control precision Monte-Carlo tolerance analysis |
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