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Proceedings Paper

Active microstructured x-ray optical arrays
Author(s): Alan G. Michette; Slawka J. Pfauntsch; Shahin Sahraei; Matthew Shand; Graeme R. Morrison; David Hart; Boris Vojnovic; Tom Stevenson; William Parkes; Camelia Dunare; Richard Willingale; Charlotte H. Feldman; Tim W. Button; Dou Zhang; Daniel Rodriguez-Sanmartin; Hongchang Wang; Andy D. Smith
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Paper Abstract

The UK Smart X-Ray Optics consortium is developing novel reflective adaptive/active x-ray optics for small-scale laboratory applications, including studies of radiation-induced damage to biological material. The optics work on the same principle as polycapillaries, using configured arrays of channels etched into thin silicon, such that each x-ray photon reflects at most once off a channel wall. Using two arrays in succession provides two reflections and thus the Abbe sine condition can be approximately satisfied, reducing aberrations. Adaptivity is achieved by flexing one or both arrays using piezo actuation, which can provide further reduction of aberrations as well as controllable focal lengths. Modelling of such arrays for used on an x-ray microprobe, based on a microfocus source with an emitting region approximately 1μm in diameter, shows that a focused flux approximately two orders of magnitude greater than possible with a zone plate of comparable focal length is possible, assuming that the channel wall roughness is less than about 2nm.

Paper Details

Date Published: 30 April 2009
PDF: 6 pages
Proc. SPIE 7360, EUV and X-Ray Optics: Synergy between Laboratory and Space, 736007 (30 April 2009); doi: 10.1117/12.820171
Show Author Affiliations
Alan G. Michette, King's College London (United Kingdom)
Slawka J. Pfauntsch, King's College London (United Kingdom)
Shahin Sahraei, King's College London (United Kingdom)
Matthew Shand, King's College London (United Kingdom)
Graeme R. Morrison, King's College London (United Kingdom)
David Hart, King's College London (United Kingdom)
Boris Vojnovic, King's College London (United Kingdom)
Univ. of Oxford (United Kingdom)
Tom Stevenson, Scottish Microelectronics Ctr. (United Kingdom)
William Parkes, Scottish Microelectronics Ctr. (United Kingdom)
Camelia Dunare, Scottish Microelectronics Ctr. (United Kingdom)
Richard Willingale, Univ. of Leicester (United Kingdom)
Charlotte H. Feldman, Univ. of Leicester (United Kingdom)
Tim W. Button, Univ. of Birmingham (United Kingdom)
Dou Zhang, Univ. of Birmingham (United Kingdom)
Daniel Rodriguez-Sanmartin, Univ. of Birmingham (United Kingdom)
Hongchang Wang, Diamond Light Source, Ltd. (United Kingdom)
Andy D. Smith, STFC Daresbury Lab. (United Kingdom)

Published in SPIE Proceedings Vol. 7360:
EUV and X-Ray Optics: Synergy between Laboratory and Space
René Hudec; Ladislav Pina, Editor(s)

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