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Active Microstructured Optical Arrays of Grazing Incidence Reflectors

Author(s): Richard Willingale | Charlotte Feldman | Alan Michette | Tim Button | Camelia Dunare | Melvyn Folkard | David Hart | Chris McFaul | Graeme R. Morrison | William Parkes | Sławka Pfauntsch | A. Keith Powell | Daniel Rodriguez-Sanmartin | Shahin Sahraei | Matthew T. Shand | Tom Stevenson | Boris Vojnovic | Dou Zhang

Journal: X-Ray Optics and Instrumentation
ISSN 1687-7632

Volume: 2010;
Date: 2010;
Original page

The UK Smart X-Ray Optics (SXO) programme is developing active/adaptive optics for terrestrial applications. One of the technologies proposed is microstructured optical arrays (MOAs), which focus X-rays using grazing incidence reflection through consecutive aligned arrays of microscopic channels. Although such arrays are similar in concept to polycapillary and microchannel plate optics, they can be bent and adjusted using piezoelectric actuators providing control over the focusing and inherent aberrations. Custom configurations can be designed, using ray tracing and finite element analysis, for applications from sub-keV to several-keV X-rays, and the channels of appropriate aspect ratios can be made using deep silicon etching. An exemplar application will be in the microprobing of biological cells and tissue samples using Ti Kα radiation (4.5 keV) in studies related to radiation-induced cancers. This paper discusses the optical design, modelling, and manufacture of such optics.
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