光学学报, 2000, 20 (5): 647, 网络出版: 2006-08-09   

高效高分辨率大面积透射光栅谱仪特性的理论分析

Theoretical Analysis of Characteristics of the High Efficiency High Resolution Soft X-Ray Transmission Grating Spectrograph
作者单位
中国科学院上海光学精密机械研究所强光光学开放研究实验室,上海 201800
摘要
为提高透射光栅谱仪对激光等离子体X光源的收集效率和光谱分辩率,研制了高效高分辨率大面积透射光栅光谱仪。该谱仪由轮胎镜、无支撑高线密度光栅和软X光CCD相机组成。应用部分相干光衍射理论,研究了该谱仪成像面上的光强分布和光谱分辩率,在1.4~12 nm的摄谱范围内光谱的分辨率为0.05 nm,与实验符合得很好。由于其高效率,该谱仪尤其适用于超短飞秒脉冲激光产生等离子体的实验研究。
Abstract
A newly developed high efficiency high resolution,large size transmission grating spectrograph for higher collection efficiency and higher spectral resolution used in laser produced plasma diagnosis is reported.The spectrograph comprises of a toroidal mirror as the collecting optics,a standing-free high-density transmission grating and a soft X-ray CCD camera.The partial coherent light diffraction theory is applied to determine the X-ray intensity distribution on the soft X-ray CCD camera.Analysis shows that the spectral resolution is better than 0.05 nm over the spectral range of 1.4~12 nm,which is successfully demonstrated in the relevant experiments.Owing to its high efficiency,it is especially suitable for the experiments of ultrashort femtosecond pulse laser produced plasmas.
参考文献

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邓健, 钟方川, 覃岭, 张正泉, 徐至展. 高效高分辨率大面积透射光栅谱仪特性的理论分析[J]. 光学学报, 2000, 20(5): 647. 邓健, 钟方川, 覃岭, 张正泉, 徐至展. Theoretical Analysis of Characteristics of the High Efficiency High Resolution Soft X-Ray Transmission Grating Spectrograph[J]. Acta Optica Sinica, 2000, 20(5): 647.

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