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Tunable kinoform x-ray beam splitter.

M Lebugle, G Seniutinas, F Marschall

    Optics Letters
    |November 1, 2017
    PubMed
    Summary
    This summary is machine-generated.

    We developed a tunable x-ray beam splitter using kinoform structures for high-energy photons. This device offers dynamic splitting ratios and high efficiency, enabling advanced applications in synchrotron and X-ray free electron laser diagnostics.

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    Area of Science:

    • Optics and Photonics
    • X-ray Science
    • Diffractive Optics

    Background:

    • Traditional binary diffraction gratings have limitations for high-performance X-ray applications.
    • Kinoform structures offer a promising alternative for advanced diffractive optics.

    Purpose of the Study:

    • To demonstrate a novel X-ray beam splitter utilizing kinoform structures.
    • To achieve high performance for multi-kilo-electron-volt (keV) photons.
    • To explore the tunable nature and efficiency of the device.

    Main Methods:

    • Fabrication of a beam splitter based on kinoform diffractive structures.
    • Characterization of the beam splitter's performance across a tunable photon energy range (7.2-19 keV).
    • Measurement of splitting ratio, diffraction efficiency, extinction ratio, and angular separation.

    Main Results:

    • Demonstrated a dynamical splitting ratio tunable from 0% to 99.1% by adjusting optic tilt.
    • Achieved high diffraction efficiency (62.6%) and a low extinction ratio (0.6%) at 12.4 keV.
    • Obtained an angular separation of 0.5 mrad for the split X-ray beams.

    Conclusions:

    • The kinoform-based X-ray beam splitter overcomes limitations of conventional gratings.
    • The device offers tunable, high-performance beam splitting for multi-keV photons.
    • Potential applications include beam monitoring, online diagnostics, beamline multiplexing, and X-ray pulse manipulation.