| 共轴抛物镜线聚焦性能的2维分析 |
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| 引用本文： | 李汉明,李英骏.共轴抛物镜线聚焦性能的2维分析[J].强激光与粒子束,2005,17(12):1791-1793. |
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| 作者姓名： | 李汉明 李英骏 |
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| 作者单位： | 中国矿业大学,力学与建筑工程学院,北京,100083;中国科学院,物理研究所,光物理实验室,北京,100080;中国矿业大学,力学与建筑工程学院,北京,100083;中国科学院,物理研究所,光物理实验室,北京,100080 |
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| 基金项目： | 国家863计划项目资助课题;国家自然科学基金资助课题（10474137） |
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| 摘 要： | 掠入射泵浦方式作为一种全新的X射线激光泵浦方式，采用了共轴抛物镜作为线聚焦器件。利用2维光路追踪程序，计算了高斯光束从5°掠入射角增加到7°时入射到共轴抛物镜上的线聚焦效果。研究发现，掠入射角从5°增加到7°过程中，线聚焦的尺寸随着掠入射角变大,线聚焦长度从6 mm逐渐变长到12 mm,线聚焦宽度从150 μm变到40 μm；掠入射角6.5°～7°可以实现符合实验要求的线聚焦效果，线聚焦尺寸约10 mm×20 μm(最小线聚焦宽度)，7°掠入射可以实现较好的线聚焦，基本满足实验的要求。
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| 关 键 词： | X射线激光 共轴抛物镜 掠入射 线聚焦 饱和输出 光路追踪 |
| 文章编号： | 1001-4322(2005)12-1791-03 |
| 收稿时间： | 2005-03-28 |
| 修稿时间： | 2005-07-07 |
2D analysis of the line focus of the on-axis parabola |
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| LI Han-ming,LI Ying-jun.2D analysis of the line focus of the on-axis parabola[J].High Power Laser and Particle Beams,2005,17(12):1791-1793. |
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| Authors: | LI Han-ming LI Ying-jun |
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| Institution: | 1. School of Mechanics, Architecture and Civil Engineering,China University of Mining and Technology, Beijing 100083, China;2. Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, 100080 Beijing, China |
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| Abstract: | As a novel pumping scheme,the line focus system applied in the grazing incidence is the on-axis parabola.Using 2D ray-tracing program,the line focus effects with different incidence angle of a Gaussian laser pulse were calculated.As the incidence angle increases from 5° to 7°,the length of the line focus is improved from 6 mm to 12 mm,and the widthes are varied from 150 μm to 40 μm.The results show that the 6.5°~7° incidence is capable of realizing a well line focus with 10 mm×20 μm to satisfy our experiment. |
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| Keywords: | X-ray laser On-axis parabola Grazing incidence Line focus Saturated output Ray tracing |
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