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Active microstructured x-ray optical arrays

Research output: Chapter in Book/Report/Conference proceedingConference paper

Alan G. Michette, Slawomira 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

Original languageEnglish
Title of host publicationEUV and x-ray optics: synergy between laboratory and space
Place of PublicationBELLINGHAM
ISBN (Print)978-0-8194-7634-0
Publication statusPublished - 2009
EventSPIE Europe Conference on EUV and X-Ray Optics - Synergy between Laboratory and Space/Optics + Optoelectronics Symposium - Prague, Czech Republic
Duration: 20 Apr 200922 Apr 2009

Publication series

NameProceedings of SPIE--the International Society for Optical Engineering


ConferenceSPIE Europe Conference on EUV and X-Ray Optics - Synergy between Laboratory and Space/Optics + Optoelectronics Symposium
CountryCzech Republic

King's Authors


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 tow 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 1 mu m 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.

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