TY - CHAP
T1 - Active microstructured x-ray optical arrays
AU - Michette, Alan G.
AU - Pfauntsch, Slawomira
AU - Sahraei, Shahin
AU - Shand, Matthew
AU - Morrison, Graeme R.
AU - Hart, David
AU - Vojnovic, Boris
AU - Stevenson, Tom
AU - Parkes, William
AU - Dunare, Camelia
AU - Willingale, Richard
AU - Feldman, Charlotte H.
AU - Button, Tim W.
AU - Zhang, Dou
AU - Rodriguez-Sanmartin, Daniel
AU - Wang, Hongchang
AU - Smith, Andy D.
PY - 2009
Y1 - 2009
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=69949145510&partnerID=8YFLogxK
M3 - Conference paper
SN - 978-0-8194-7634-0
VL - 7360
T3 - Proceedings of SPIE--the International Society for Optical Engineering
BT - EUV and x-ray optics: synergy between laboratory and space
PB - SPIE - INT SOC OPTICAL ENGINEERING
CY - BELLINGHAM
T2 - SPIE Europe Conference on EUV and X-Ray Optics - Synergy between Laboratory and Space/Optics + Optoelectronics Symposium
Y2 - 20 April 2009 through 22 April 2009
ER -