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Broadband High-Resolution Stigmatic Spectral Imaging in the XUV Range

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Journal of Russian Laser Research Aims and scope

Abstract

We describe the experimental implementation of high-resolution soft X-ray spectrographs, which are stigmatic throughout their operating range. The optical configuration comprises a grazing-incidence plane VLS grating and a broadband normal-incidence focusing mirror with an aperiodic multilayer coating structure. The operating range is defined by the aperiodic multilayer mirror in use (Mo/Si: 12.5 – 25 nm; Mo/Be: 11 – 14 nm). The spectral resolution is determined by CCD detector resolution and is numerically equal to the product of the plate scale and the double pixel size. Vertically spaceresolved laser-produced plasma spectra of multiply charged ions are presented. The spatial resolution is equal to about 26 μm, the double pixel size. We discuss the prospect of extending high-resolution stigmatic spectral imaging below 11 nm and outline the data of numerical calculations of broadband normal-incidence mirrors based on aperiodic Ru/Sr and La/B4C multilayer structures.

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Authors and Affiliations

  1. Lebedev Physical Institute, Russian Academy of Sciences, Leninskii Prospect 53, Moscow, 119991, Russia

    A. O. Kolesnikov, A. N. Shatokhin, E. A. Vishnyakov & E. N. Ragozin

Authors
  1. A. O. Kolesnikov
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  2. A. N. Shatokhin
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  3. E. A. Vishnyakov
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  4. E. N. Ragozin
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Correspondence to E. N. Ragozin.

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Kolesnikov, A.O., Shatokhin, A.N., Vishnyakov, E.A. et al. Broadband High-Resolution Stigmatic Spectral Imaging in the XUV Range. J Russ Laser Res 44, 480–487 (2023). https://doi.org/10.1007/s10946-023-10155-5

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  • DOI: https://doi.org/10.1007/s10946-023-10155-5

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