| 无谐波软X射线单色仪设计 |
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| 引用本文： | 韦飞,郭亦鸿,冷双,魏来,曹磊峰.无谐波软X射线单色仪设计[J].空间科学学报,2019,39(1):105-110. |
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| 作者姓名： | 韦飞 郭亦鸿 冷双 魏来 曹磊峰 |
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| 作者单位： | 中国科学院国家空间科学中心 北京100190;天基空间环境探测北京市重点实验室 北京100190;中国科学院空间态势感知技术重点实验室 北京100190;中国工程物理研究院激光聚变研究中心 绵阳621900 |
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| 基金项目： | 国家科技部国家重大科学仪器设备开发专项（2012YQ130125），中国科学院空间科学战略性先导科技专项（XDA04000000）和国家重点研发计划国家质量基础的共性技术研究与应用NQI专项（2016YFF0200802）共同资助 |
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| 摘 要： | 能量在0.1～1keV范围的软X射线辐射在空间科学任务中具有重要应用.飞行前的辐射定标试验及地面辐射定标系统采用传统单色仪分光时，由于波长的整数倍关系带来的高次谐波污染问题非常严重.高次谐波在光束中的占比严重影响了软X射线探测仪器的定标数据精度.本文探讨了无谐波单极衍射技术在产生具有高单色性能的软X射线光束中的应用，基于单极衍射光栅技术实现软X射线无谐波单色仪设计.软X射线无谐波单色仪应用于空间辐射定标系统时能够将高次谐波占比抑制到0.3%以下，满足空间软X射线科学仪器高精度辐射定标试验对高次谐波抑制的要求.
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| 关 键 词： | 空间环境 软X射线 高次谐波 单极衍射光栅 定标 |
| 收稿时间： | 2017-08-25 |
Highly Monochromatic Soft X-ray Beam Source Design |
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| Affiliation: | 1 National Space Science Center, Chinese Academy of Sciences, Beijing 100190;2 Beijing Key Laboratory of Space Environment Exploration, Beijing 100190;3 Key Laboratory of Environmental Space Situation Awareness Technology, Chinese Academy of Sciences, Beijing 100190;4 Research Center of Laser Fusion, Chinese Academy of Engineering Physics, Mianyang 621900 |
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| Abstract: | The soft X-ray radiation in the range from 100eV to 1keV consists of rich significant emission lines and the blackbody continuum. It is commonly used in X-ray instruments for space scientific missions, and the instruments should be well calibrated for spectral response before the flight. Because of the obvious spectra contamination from higher orders of diffraction, X-ray source used traditional gratings is difficult to get highly monochromatic X-ray beam. A new monochromator based on single-order diffraction grating is designed in patterns of zigzag or photon sieves, which has excellent diffraction characteristics of suppressing all higher orders of diffraction from shorter wavelength. The monochromator can keep the percent of the higher order contamination below 0.3%. The results can bring great advantages in preflight calibration of X-ray instruments for space science purposes. |
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