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Technical Physics

, Volume 64, Issue 11, pp 1680–1683 | Cite as

Fabrication and Study of a Concave Crystal Mirror for the KORTES Project

  • A. A. AkhsakhalyanEmail author
  • A. D. Akhsakhalyan
  • S. A. Garakhin
  • N. F. Erkhova
  • A. S. Kirichenko
  • S. V. Kuzin
  • N. N. Salashchenko
  • M. N. Toropov
  • N. I. Chkhalo
Article
  • 9 Downloads

Abstract

A method for fabrication of a concave spherical mirror made of crystalline quartz is proposed and X-ray optical properties of the mirror are studied. The radius of curvature is 1630 mm. The shape of the mirror surface is studied using an interferometer with a diffraction reference wave. In the entire processing region, the maximum deviation from the nearest sphere is about 0.2 μm and the rms is 34 nm, so that high quality of imaging is provided with an angular error of about 2 (angular seconds). Reflection coefficient (about 7%) and lower bound limit of spectral selectivity (λ/δλ ≈ 1775) are determined in the vicinity of a wavelength of λ = 0.834 nm, which is close to the working wavelengths of the MgXII doublet (λ = 0.8418 and 0.8423 nm). Position of the Bragg peak and spectral selectivity remain unchanged upon bending of the crystal mirror within measurement accuracy.

Notes

ACKNOWLEDGMENTS

This work was performed using the equipment of the shared facility of the Institute for Physics of Microstructures.

FUNDING

This work was supported by the Ministry of Education and Science of the Russian Federation (contract no. 075-02-2018-182 (RFMEFI60418X0202)).

CONFLICT OF INTEREST

The authors declare that there is no conflict of interest.

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Copyright information

© Pleiades Publishing, Ltd. 2019

Authors and Affiliations

  • A. A. Akhsakhalyan
    • 1
    Email author
  • A. D. Akhsakhalyan
    • 1
  • S. A. Garakhin
    • 1
  • N. F. Erkhova
    • 2
  • A. S. Kirichenko
    • 2
  • S. V. Kuzin
    • 2
  • N. N. Salashchenko
    • 1
  • M. N. Toropov
    • 1
  • N. I. Chkhalo
    • 1
  1. 1.Institute for Physics of Microstructures, Russian Academy of SciencesNizhny NovgorodRussia
  2. 2.Lebedev Physical Institute, Russian Academy of SciencesMoscowRussia

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