Submicrometer hard X-ray focusing using a single-bounce ellipsoidal capillary combined with a Fresnel zone plate.
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.
Snigirev
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European Synchrotron Radiation Facility, 6 rue Jules Horowitz, 38043 Grenoble, France. snigirev@esrf.fr
Bjeoumikhov
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Erko
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Snigireva
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I
Grigoriev
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Yunkin
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Erko
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M
Bjeoumikhova
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S