Fabrication and Study of a Concave Crystal Mirror for the KORTES Project
- Authors: Akhsakhalyan A.A.1, Akhsakhalyan A.D.1, Garakhin S.A.1, Erkhova N.F.2, Kirichenko A.S.2, Kuzin S.V.2, Salashchenko N.N.1, Toropov M.N.1, Chkhalo N.I.1
-
Affiliations:
- Institute for Physics of Microstructures, Russian Academy of Sciences
- Lebedev Physical Institute, Russian Academy of Sciences
- Issue: Vol 64, No 11 (2019)
- Pages: 1680-1683
- Section: Article
- URL: https://journals.rcsi.science/1063-7842/article/view/204559
- DOI: https://doi.org/10.1134/S1063784219110033
- ID: 204559
Cite item
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.
About the authors
A. A. Akhsakhalyan
Institute for Physics of Microstructures, Russian Academy of Sciences
Author for correspondence.
Email: akh@ipm.sci-nnov.ru
Russian Federation, Nizhny Novgorod, 603950
A. D. Akhsakhalyan
Institute for Physics of Microstructures, Russian Academy of Sciences
Email: akh@ipm.sci-nnov.ru
Russian Federation, Nizhny Novgorod, 603950
S. A. Garakhin
Institute for Physics of Microstructures, Russian Academy of Sciences
Email: akh@ipm.sci-nnov.ru
Russian Federation, Nizhny Novgorod, 603950
N. F. Erkhova
Lebedev Physical Institute, Russian Academy of Sciences
Email: akh@ipm.sci-nnov.ru
Russian Federation, Moscow, 119991
A. S. Kirichenko
Lebedev Physical Institute, Russian Academy of Sciences
Email: akh@ipm.sci-nnov.ru
Russian Federation, Moscow, 119991
S. V. Kuzin
Lebedev Physical Institute, Russian Academy of Sciences
Email: akh@ipm.sci-nnov.ru
Russian Federation, Moscow, 119991
N. N. Salashchenko
Institute for Physics of Microstructures, Russian Academy of Sciences
Email: akh@ipm.sci-nnov.ru
Russian Federation, Nizhny Novgorod, 603950
M. N. Toropov
Institute for Physics of Microstructures, Russian Academy of Sciences
Email: akh@ipm.sci-nnov.ru
Russian Federation, Nizhny Novgorod, 603950
N. I. Chkhalo
Institute for Physics of Microstructures, Russian Academy of Sciences
Email: akh@ipm.sci-nnov.ru
Russian Federation, Nizhny Novgorod, 603950