共查询到19条相似文献,搜索用时 62 毫秒
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KBA型X射线显微镜精度控制方法 总被引:1,自引:1,他引:0
KBA(改进的KB)型X射线显微镜为掠入射非共轴反射成像系统.前一组反射镜和后一组反射镜之间并不是严格垂直的,给像质分析带来相当大的困难.通常的光学CAD软件难于适应这种光学系统.把共轴球面折射系统的向量公式调整后设计了掠入射非共轴KBA显微镜成像系统程序,并用该程序分析了KBA系统的像差及综合误差.分析结果表明,KBA显微镜系统是大像差系统,当物距公差为-0.4~ 1 mm,掠入射公差在-8"~0,双反射镜夹角公差在-20"~0,弥散斑的变化在允许的范围内.该程序对于分析和研制KBA显微镜系统具有重要意义. 相似文献
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基于栅控脉冲发射X射线源与单光子探测技术的X射线通信已经实现了实验室语音通信验证,并对通信系统的误码率性能进行了分析,为探索未来X射线深空应用打下了坚实的基础.针对目前X射线通信面临的信号发散角大、通信距离短、难以实现工程化应用的情况,迫切需要对X射线通信天线系统进行深入研究.为了提高信号增益、增大X射线通信的距离,提出了多层嵌套式X射线聚焦光学作为X射线通信的\"收发天线\",理论分析了X射线聚焦光学用于X射线通信\"收发天线\"的可行性,分析了X射线聚焦光学的理论基础与结构设计,对\"发射天线\"发散角、\"接收天线\"有效面积与焦斑尺寸、信号增益等性能做了探讨.结果表明:在信号发射端,\"天线\"的发散角为3 mrad左右,发射增益23 d B;在信号接收端,\"接收天线\"的有效面积5700 mm2@1.5 keV,焦斑直径为4.5 mm,接收增益为25 d B,通信系统总的增益可达48 d B. 相似文献
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抛物面型X射线组合折射透镜聚焦性能的理论与实验研究 总被引:1,自引:0,他引:1
结合衍射理论和矩阵光学方法得出抛物面型X射线组合折射透镜的光学性能指标(包括其焦距的严格表达式、薄透镜近似的判定准则、透过率和有效孔径,以及极限聚焦光斑尺寸等).采用X射线深度光刻技术实际制作了PMMA材料抛物面型X射线组合折射透镜并给出了工艺测试结果.最后在北京同步辐射装置(BSRF)上,实际构建了基于3种不同结构参数的PMMA材料抛物面型X射线组合折射透镜的微束聚焦实验系统.并实际测试了其聚焦性能,均获得了良好的聚焦效果,给出实测结果并对实测结果进行了分析和讨论. 相似文献
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X射线光源的焦斑尺寸和焦深对X射线光谱学,尤其是对于微区X射线衍射与荧光分析等领域十分重要的参数.如何高效而准确的表征这些参数对于X射线光源的应用和发展至关重要.现有的光源参数表征方法,尤其在表征微焦斑光源的参数时,都存在自身的局限性.锥形单玻璃管X射线聚焦镜是一种常用的X射线聚焦器件.根据锥形单玻璃管X射线聚焦镜滤波... 相似文献
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ZHANG Honglin;YANG Zhitao;WANG Yusa;ZHAO Zijian;MA Jia;HOU Dongjie;YANG Xiongtao;ZHU Yuxuan;YAN Yanji;CHEN Yong;WANG Shijie 《光子学报》2023,52(5):233-243
One of the crucial components of an X-ray focusing lens's performance test is effective area calibration. The focusing lens will be calibrated on the ground before being launched into space. The X-ray source can't achieve the ideal condition of an incident on the mirror in parallel due to the distance restriction of the ground experimental device, so its calibration results will be different from those in orbit. In order to understand and correct the discrepancy between the effective area of the Wolter-Ⅰ X-ray focusing lens in ground calibration and in-orbit calibration, the effective area of the X-ray telescope carried by the Einstein probe was simulated and analyzed under two calibration conditions. The ground calibration experiment of effective area was carried out in the 100-meter X-ray calibration device of the Institute of High Energy Physics, Chinese Academy of Sciences.First, prior to designing the light source, the calibration model is created, then the incident conditions of on-orbit and ground light sources are taken into consideration. The program makes use of X-ray sources with energies of 1.49 keV, 4.5 keV, and 8.5 keV. Second, the light source used for the on-orbit calibration can be thought of as a parallel light source while the light source used for the ground calibration can be considered a point source. The effective area of the focusing lens under the two calibrations is determined using the two incident light sources to mimic the ground calibration and the on-orbit calibration, respectively. The deviation percentage of their effective areas is determined using the simulation data. To determine the connection between the effective area and the off-axis angle, the off-axis analysis of the focusing lens's effective area is performed within 1°, and the change diagram of the off-axis effective area is drawn. Lastly, the ground calibration experiment is run in the Institute of High Energy's 100-meter calibration device. The effective area of the focusing lens is determined using the photon count on the monitor before and after the addition of the focusing lens in the experiment, which employs continuous spectrum X-rays. The useful area is corrected based on the simulation-derived deviation ratio. In a similar manner, the off-axis experiment is conducted within 1, and the change diagram of the experiment's off-axis effective area is made.The findings indicate that when the X-ray energy is 1.49 keV, 4.5 keV, and 8.5 keV correspondingly, the effective area of ground calibration is 2.7%, 3.0%, and 4.0%, bigger than that of on-orbit calibration. The difference between them increases with increasing X-ray energy. This phenomenon is compatible with the energy-dependent decrease in X-ray reflectivity. In the simulation and experiment, the off-axis angle affects the focusing mirror's effective area, which falls by 20% when the off-axis angle approaches 10'. The research presented in this paper demonstrates that the effective area of ground calibration is always greater than the effective area of on-orbit calibration and that the effective area of on-orbit calibration of the focusing lens can be predicted using ground calibration data combined with simulation. The off-axis effective area of the focusing lens also demonstrates a clear relationship with the off-axis angle. This study's methodology can offer data references for the Wolter-Ⅰ focusing mirror-equipped X-ray astronomy satellite's effective area calibration. 相似文献
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指出了文献[1]在物理概念上和公式推导中的错误,并在订正了这些错误之后,考虑了实际的激光等离子体光源的几何尺度和线状等离子体的安排,对在复合泵浦X激光增益实验中所使用的带超环面镜X光中继元件的掠入射光栅光谱仪系统进行了全面的模拟计算.结果表明,作者所使用的带超环面镜的X光增益测试系统,其因离焦而导致的非线性效应是完全可以忽略的,系统的空间分辨能力的下降也是非常小的,从而否定了文献[1]中的结论,表明作者在X激光增益测量实验中所使用的带超环面镜X光中继元件的掠入射光栅光谱仪系统是完全可靠的. 相似文献
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一种时间分辨三通道软X射线光谱仪 总被引:2,自引:0,他引:2
报道了时间分辨的三通道软X射线光谱仪研制工作,重点介绍了研制的三通道能谱仪的工作原理以及210 eV,420 eV和900 eV三个能区的设计参数,谱仪在上海神光Ⅱ高功率激光器三倍频实验中进行了多次实时考核,取得较好实验结果,将多道平面镜、滤光片成功配接于高时间分辨X射线条纹相机上,使该谱仪在亚千电子伏能区内,可同时进行三个波段软X射线的时间和空间分辨测量,提供的实验结果也表明:X射线平面镜结合滤光片的分光技术可应用于高时间分辨的X射线条纹相机上,从而获得高达10 ps的时间分辨.关键词:软X射线条纹相机平面镜滤光片掠入射 相似文献
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基于布拉格反射镜的X射线多色单能成像谱仪 总被引:1,自引:0,他引:1
报道了一种基于布拉格反射镜的多色单能成像谱仪研制工作,谱仪由针孔阵列、布拉格反射镜和CCD相机组成.大约有300个微孔的针孔阵列板置于布拉格镜前用于空间成像,通过布拉格反射镜的单色化,投射到CCD上的数百个小孔成像沿色散方向获得了能量分辨.经过图像处理,可以还原得到目标的多色单能二维成像.根据采用的布拉格分光元件和图像还原方法,谱仪的能量分辨达到了50—200(λ/Δλ);针孔成像的空间分辨优于10 μm.同时还为该谱仪开发了专门的单能图像重建软件及图像数据后处理软件,可以在任意选择的窄能带内还原准单能图像.并重点介绍了该谱仪的优化设计、获得的技术指标以及专门研制的超短周期(2.5 nm)X射线W/B4C多层镜.关键词:X射线光学诊断技术布拉格反射镜X射线多层镜 相似文献
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Ruxin Li Pinzhong Fan Zhizhan Xu Zhengquan Zhang Yaolin Li 《Chinese Journal of Lasers》1993,2(3):229-239
The ray tracing program for soft X-ray optics simulation is presented. This program can be used to study X-ray imaging property, energy transportation and concentration of X-ray beams by various X-ray optics. As an example, the results of the simulation about imaging characteristics of the toroidal mirror are given. 相似文献