基于X射线毛细管光学的用于高强度能量色散X射线衍射的聚焦结构几何形状。

Focal construct geometry for high intensity energy dispersive x-ray diffraction based on x-ray capillary optics.

作者信息

Li Fangzuo, Liu Zhiguo, Sun Tianxi, Jiang Bowen, Zhu Yu

机构信息

The Key Laboratory of Beam Technology and Materials Modification of the Ministry of Education, Beijing Normal University, Beijing 100875, China.

出版信息

J Chem Phys. 2016 Mar 14;144(10):104201. doi: 10.1063/1.4943268.

DOI:10.1063/1.4943268

PMID:26979685

Abstract

We presented a focal construct geometry (FCG) method for high intensity energy dispersive X-ray diffraction by utilizing a home-made ellipsoidal single-bounce capillary (ESBC) and a polycapillary parallel X-ray lens (PPXRL). The ESBC was employed to focus the X-rays from a conventional laboratory source into a small focal spot and to produce an annular X-ray beam in the far-field. Additionally, diffracted polychromatic X-rays were confocally collected by the PPXRL attached to a stationary energy-resolved detector. Our FCG method based on ESBC and PPXRL had achieved relatively high intensity diffraction peaks and effectively narrowed the diffraction peak width which was helpful in improving the potential d-spacing resolution for material phase analysis.

摘要

我们提出了一种用于高强度能量色散X射线衍射的聚焦结构几何（FCG）方法，该方法利用了自制的椭球形单反射毛细管（ESBC）和多毛细管平行X射线透镜（PPXRL）。ESBC用于将来自传统实验室源的X射线聚焦到一个小焦斑，并在远场产生环形X射线束。此外，通过连接到固定能量分辨探测器的PPXRL共焦收集衍射的多色X射线。我们基于ESBC和PPXRL的FCG方法实现了相对较高强度的衍射峰，并有效缩小了衍射峰宽度，这有助于提高材料相分析的潜在d间距分辨率。