SBIR Phase I: A Compact Micro X-Ray Absorption Spectrometer System

这一小型企业创新研究(SBIR)第一阶段项目将通过建立实验室原型来确定基于多毛细光学的微X射线吸收光谱仪(XAS)系统的可行性，该系统具有低功率微聚焦X射线源。该系统克服了目前最先进系统的局限性，即：(A)X射线源和样品是固定的；(B)将实施低功率X射线源；(C)可以使用同一仪器进行XANES和EXAFS分析；(D)随着多毛细X射线光学技术的进步，可以进行15微米X射线束的小点微量分析；以及(E)只需选择适当的现成单色器，就可以改变探测能量。将开发定制的多毛细管光学系统，表征新的X射线源，并建立实验室系统，分析系统的性能，以确定光点大小、能量分辨率、强度、检测极限和易用性。一个成功的微型XAS系统将被用来确定材料的化学状态信息，作为制造过程控制系统的工具，或作为现场样品的常规筛选。它克服了基于同步加速器的Micro-XAS系统(尺寸、可用性、成本、维护等)的缺点。并使进行化学状态分析以监控制造过程和现场样品的常规评估成为可能。

This Small Business Innovation Research (SBIR) Phase I project will determine the feasibility of a polycapillary optics-based micro-x-ray absorption spectrometer (XAS) system with a low-power microfocus x-ray source by building a laboratory prototype. The system overcomes limitations of current state-of-the-art systems in that (a) the x-ray source and sample are stationary; (b) a low power x-ray source will be implemented; (c) both XANES and EXAFS analysis are possible using the same instrument; (d) small spot microanalysis with a 15 micrometer x-ray beam is possible with advances in poly-capillary x-ray optics; and (e) the probing energy may be varied by simply choosing the appropriate off-the-shelf mono-chromator. Custom poly-capillary optics will be developed, a new x-ray source characterized, and a laboratory system will be built and the performance of the system will be analyzed to determine spot size, energy resolution, intensity, detection limits, and ease of use. A successful micro-XAS system would be used to determine chemical state information of materials as a tool in manufacturing process control systems, or as for routine screening of field samples. It overcomes the shortcomings of synchrotron based micro-XAS systems (size, availability, cost, maintenance, etc.) and makes it possible to perform chemical state analysis for monitoring manufacturing processes and routine evaluation of field samples.