Multilayer supermirrors: broad-band reflection coatings for the 15 to 100 keV range

Karsten Dan Joensen; Paul Gorenstein; Finn Erland Christensen; P. Hoeghoej; Eric Ziegler; Jean Susini; Andreas K. Freund; James L. Wood

doi:10.1117/12.192082

4 November 1994 Multilayer supermirrors: broadband reflection coatings for the 15- to 100-keV range

Karsten Dan Joensen, Paul Gorenstein, Finn Erland Christensen, P. Hoeghoej, Eric Ziegler, Jean Susini, Andreas K. Freund, James L. Wood

Author Affiliations +

Proceedings Volume 2253, Optical Interference Coatings; (1994) https://doi.org/10.1117/12.192082
Event: 1994 International Symposium on Optical Interference Coatings, 1994, Grenoble, France

Abstract

Supermirrors are multilayer structures where the thickness of the layers down through the structure changes so that wide-band reflection occurs. The principles were developed in the mid-70's and have been used extensively for neutron optics. Absorption in the upper layers limits the attainable reflectivity for X-rays. For hard X-rays (>= 15 keV), the absorption, however, is low enough that it is possible to design supermirrors with 10 - 70% reflectivity in a band approximately equals 3 times the width of the total reflection regime. Supermirrors of W/Si and Ni/C have been successfully fabricated and characterized. The measured X-ray reflectivities are well accounted for by the standard dynamical theories of multilayer reflection. Hard X-ray applications that could benefit from X-ray supermirror coatings include focusing and imaging instrumentation for astrophysics, and collimating and focusing device for synchrotron radiation.

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Karsten Dan Joensen, Paul Gorenstein, Finn Erland Christensen, P. Hoeghoej, Eric Ziegler, Jean Susini, Andreas K. Freund, and James L. Wood "Multilayer supermirrors: broadband reflection coatings for the 15- to 100-keV range", Proc. SPIE 2253, Optical Interference Coatings, (4 November 1994); https://doi.org/10.1117/12.192082

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