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Proceedings Paper

Hard x-ray focusing with extremely long compound refractive lens
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Paper Abstract

We present results of study of optical properties of extremely thick refractive lens when the thickness (or length) of a compound refractive lens is comparable with its focal distance. We tested a 2D parabolic compound refractive lens composed from 300-500 elements. Each element is a bi-concave lens made from aluminum with the curvature radius R = 0.2 mm and thickness 1 mm. Special long holders were designed and manufactured to keep up to 500 of elements. As far as the thin lens approximation is not valid we developed and used accurate theory of long parabolic compound lens for ray-tracing analysis. The experimental measurements were performed for the X-ray energies E = 20-30 keV. The measured focus distance and effective aperture correlate with the theory.

Paper Details

Date Published: 4 November 2004
PDF: 8 pages
Proc. SPIE 5539, Design and Microfabrication of Novel X-Ray Optics II, (4 November 2004);
Show Author Affiliations
Irina I. Snigireva, European Synchrotron Radiation Facility (France)
Victor G. Kohn, Kurchatov Institute (Russia)
Anatoly A. Snigirev, European Synchrotron Radiation Facility (France)

Published in SPIE Proceedings Vol. 5539:
Design and Microfabrication of Novel X-Ray Optics II
Anatoly A. Snigirev; Derrick C. Mancini, Editor(s)

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