利用光电子诱导气体电离实现X射线菲涅耳透射的自探测
Self-detection of x-ray Fresnel transmissivity using photoelectron-induced gas ionization
摘要：
研究了在硬X射线全外反射条件下，气流电离室中X射线反射镜的电响应。结果表明，系统的电响应作为入射角的函数由反射镜材料的X射线菲涅耳透射和光子-电子衰减特性定义。对体系的量子产率给出了一个简单的解释。该方法可以作为一个基础，为非侵入性的硬X射线光学原位诊断，容易获得互补的X射线transmittance数据在X射线反射率实验，也可能铺平了道路，以先进的计划，角度和能量分辨X射线探测器。
英文摘要：
Electric response of an x-ray mirror enclosed in a gas flow ionization chamber was studied under the conditions of total external reflection for hard x-rays. It is shown that the electric response of the system as a function of the incidence angle is defined by x-ray Fresnel transmissivity and photon-electron attenuation properties of the mirror material. A simple interpretation of quantum yield of the system is presented. The approach could serve as a basis for non-invasive in-situ diagnostics of hard x-ray optics, easy access to complementary x-ray transmissivity data in x-ray reflectivity experiments and might also pave the way to advanced schemes for angle and energy resolving x-ray detectors.
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