Active microstructured arrays for x-ray optics
Active microstructured arrays for x-ray optics
复制标题
用于 X 射线光学的有源微结构阵列
DOI：
10.1117/12.735500
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发表时间：
2007
影响因子：
1.7
通讯作者：
Dou Zhang
中科院分区：
文献类型：
--
作者：
A. Michette;T. Button;C. Dunare;C. Feldman;M. Folkard;D. Hart;C. Mcfaul;G. Morrison;W. Parkes;S. Pfauntsch;A. K. Powell;D. Rodriguez;Shahin Sahraei;T. Stevenson;B. Vojnovic;R. Willingale;Dou Zhang
英国智能X射线光学计划正在开发所需的技术，既可以提高现有X射线系统(如X射线望远镜)的性能，又可以将X射线光学的用途扩展到更广泛的科学研究类别。该方法需要使用主动/自适应方法来控制X射线系统的固有像差。为了实现这一点，提出的技术之一是微结构光学阵列，它使用掠入射反射通过连续排列的通道阵列。虽然这种阵列在概念上类似于多毛细管和微通道板光学，但它们更灵活。弯曲阵列允许可变焦距，而弯曲部分阵列则提供自适应或主动系统。可以使用光线跟踪和有限元分析来设计定制配置，适用于从亚keV到几keV X射线的各种应用。沟道可以使用可以提供适当长宽比的深硅刻蚀来制造，并使用压电致动器来弯曲。一个示范应用将是在与辐射诱发癌症相关的研究中使用TiKα辐射(4.5keV)对生物细胞和组织样本进行微观探测。
The UK Smart X-Ray Optics programme is developing the techniques required to both enhance the performance of existing X-ray systems, such as X-ray telescopes, while also extending the utility of X-ray optics to a broader class of scientific investigation. The approach requires the control of the inherent aberrations of X-ray systems using an active/adaptive method. One of the technologies proposed to achieve this is micro-structured optical arrays, which use grazing incidence reflection through consecutive aligned arrays of channels. Although such arrays are similar in concept to polycapillary and microchannel plate optics, they are more flexible. Bending the arrays allows variable focal length, while flexing parts of them provides adaptive or active systems. Custom configurations can be designed, using ray tracing and finite element analysis, for applications from sub-keV to several-keV X-rays. The channels may be made using deep silicon etching, which can provide appropriate aspect ratios, and flexed using piezo actuators. An exemplar application will be in the micro-probing of biological cells and tissue samples using Ti Kα radiation (4.5 keV) in studies related to radiation induced cancers.