Open AccessSubmicrometer hard X‐ray focusing using a single‐bounce ellipsoidal capillary combined with a Fresnel zone plate
Author(s) -
Erko A.,
Bjeoumikhov A.,
Erko M.,
Yunkin V.,
Snigireva I.,
Grigoriev M.,
Snigirev A.,
Bjeoumikhova S.
Publication year - 2007
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049507004050
Subject(s) - zone plate , optics , capillary action , synchrotron radiation , fresnel zone , ellipsoid , physics , synchrotron , ridge , micrometer , focus (optics) , materials science , fresnel zone antenna , diffraction , geology , radiation pattern , paleontology , telecommunications , astronomy , computer science , antenna (radio) , slot antenna , thermodynamics
A single‐bounce capillary with an ellipsoidal shape has been used for two‐step focusing in combination with a Fresnel zone plate (FZP). The FZP serves as a first microfocusing element and produces a demagnified micrometer image of the source, before the elliptical capillary makes a last final compression of the beam. With 15 keV X‐rays from the European Synchrotron Radiation Facility BM5 bending magnet, the two‐step demagnification system produced a focus of about 250 nm with a gain of more than 1000. The use of an ellipsoidal capillary as a micro‐mirror under off‐axis illumination using micro‐prefocusing optics might open up new opportunities in nanofocusing developments.