整体多毛细管X光透镜在扩展X射线吸收精细结构分析技术中的应用

摘要

为了将整体多毛细管X光透镜应用到扩展X射线吸收精细结构分析技术中,对整体多毛细管X光透镜的功率密度增益、光斑稳定性、高能滤波性质等进行了系统表征.通过实验可知,利用基于整体多毛细管X光透镜的扩展X射线吸收精细结构分析设备可对样品进行微区分析,其空间分辨为25 μm左右;利用整体多毛细管X光透镜会聚激光等离子体发出的X射线进行超快时间分辨扩展X射线吸收精细结构分析时,透镜的功率密度增益约为3 000.实验结果证明,整体多毛细管X光透镜可以改善扩展X射线吸收精细结构分析设备的性能.%The performance of the Monolithic Polycapillary X-ray Lens(MPXRL)for application in the Extended X-ray Absorption Fine Structure(EXAFS)technique is reported,especially,the main characters of the MPXRL such as gain in flux density,stabilizing effect,and high energy filtering.Experimental results show that the spatial resolution of the EXAFS facility based on the MPXRL is about 25 μm,and the gain in flux density of the Monolithic Polycapillary Focusing X-ray Lens(MPFXRL)is about 3 000 when the MPFXRL is used to focus the laser plasma pulsed X-ray for ultrafast time-resolved EXAFS experiments.These indicate that the MPXRL is helpful in the improvement of the EXAFS facilities.