Design of grazing-incidence multilayer supermirrors for hard-X-ray reflectors

K. D. Joensen, P. Voutov, A. Szentgyorgyi, J. Roll, P. Gorenstein, P. Hoghoj, Finn Erland Christensen

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Extremely broadband grazing-incidence multilayers for hard-X-ray reflection can be obtained by a gradual change of the layer thicknesses down through the structure. Existing approaches for designing similar neutron optics, called supermirrors, are shown to provide respectable performance when applied to X-ray multilayers. However, none of these approaches consider the effects of imperfect layer interfaces and absorption in the overlying layers. Adaptations of neutron designs that take these effects into account are presented, and a thorough analysis of two specific applications (a single hard-X-ray reflector and a hard-X-ray telescope) shows that an improved performance can be obtained. A multilayer whose bilayer thicknesses are given by a power law expression is found to provide the best solution; however, it is only slightly better than some of the adapted neutron designs
    Original languageEnglish
    JournalApplied Optics
    Volume34
    Issue number34
    Pages (from-to)7935-7944
    ISSN0003-6935
    DOIs
    Publication statusPublished - 1995

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