Multilayer optics for synchrotron x-ray applications
Multilayer optics for synchrotron x-ray applications
复制标题
用于同步加速器 X 射线应用的多层光学器件
DOI：
10.1117/12.192076
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
E. Ziegler
中科院分区：
文献类型：
--
作者：
E. Ziegler
多层人士都可以在需要的任何情况下发挥作用，而不是分辨率。它们用于各种经典的光学布置，从双重单色器到放牧的入射镜。还可以通过多层涂层在基板上获得梁的焦点Ca，该基材要么抛光至给定的形状，要么动态弯曲，要么是作为bragg-fresnel镜头的凹槽。使用硬X射线，吸收起着较小的作用，可以通过上的多层设计产生非常大的带通通道，但是，在温度升高的情况下，溅射的，纳米厚的单个层通常是无定形的，这是结构不稳定的原因。当光束强烈（通常是同步X射线源的情况下）时，设想了许多解决方案，包括有效冷却，使用化合物材料以及通过非周期布置对电场分布进行修饰。提出了有关多层的性能和应用程序示例的结果。
Multilayers can play a role in any situation where flux, rather than resolution, is desired. They are used in various classical optical arrangements ranging from double monochromators to grazing incidence mirrors. Beam focusing ca also be obtained by multilayer coating on a substrate that is either polished to a given shape, or dynamically bent, or grooved as a Bragg- Fresnel lens. With hard x rays, absorption plays a lesser role, allowing production of a very large bandpass through an aperiodic multilayer design, However, the sputtered, nanometer- thick individual layers are often amorphous, a cause of structural instability in case of a temperature rise. When the beam is intense, which is often the case with a synchrotron x-ray source, a number of solutions are envisaged, including efficient cooling, use of compound materials, and modification of the electric field distribution by nonperiodic arrangement. Results on the performance of multilayers and examples of applications are presented.