强激光与粒子束, 2005, 17 (12): 1791, 网络出版: 2006-04-28
共轴抛物镜线聚焦性能的2维分析
2D analysis of the line focus of the on-axis parabola
X射线激光 共轴抛物镜 掠入射 线聚焦 饱和输出 光路追踪 X-ray laser On-axis parabola Grazing incidence Line focus Saturated output Ray tracing
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12mm,线聚焦宽度从150μm变到40μm;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×20μm(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.
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.
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. 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.
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