共轴抛物镜线聚焦性能的2维分析

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2D analysis of line focus of on-axis parabola

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

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。
- X射线激光 /
- 共轴抛物镜 /
- 掠入射 /
- 线聚焦 /
- 饱和输出 /
- 光路追踪
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.
- x-ray laser /
- on-axis parabola /
- grazing incidence /
- line focus /
- saturated output /
- ray tracing

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