Open AccessИзготовление и исследование свойств вогнутого кристаллического зеркала для проекта КОРТЕС
Author(s) -
А.А. Ахсахалян,
А.Д. Ахсахалян,
C.А. Гарахин,
Н.Ф. Ерхова,
А.С. Кириченко,
С.В. Кузин,
Н.Н. Салащенко,
М.Н. Торопов,
Н.И. Чхало
Publication year - 2019
Publication title -
žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-748X
pISSN - 0044-4642
DOI - 10.21883/jtf.2019.11.48342.124-19
Subject(s) - optics , wavelength , diffraction , root mean square , bragg's law , materials science , interferometry , radius , radius of curvature , reflection (computer programming) , standard deviation , crystal (programming language) , curved mirror , physics , curvature , geometry , mean curvature , mathematics , computer security , statistics , quantum mechanics , mean curvature flow , computer science , programming language
The manufacturing method is described and the results of the study of the X-ray optical properties of a concave spherical mirror made of crystalline quartz are presented. The radius of curvature was 1630 mm. The shape of the mirror surface was studied on an interferometer with a diffraction wave of comparison. It was shown that in the whole processing area the maximum deviation from the nearest sphere was about 0.2 μm, and the square root of rms is 34 nm, which ensures high quality of images with an angular error of 2” (angular seconds). The reflection coefficients (about 7%) and the lower estimate of the spectral selectivity (λ / delta λ = 1775) are determined in the vicinity of the wavelength λ = 0.834 nm, which is close to the working wavelengths of the MgXII doublet (λ = 0.8418 and 0.8423 nm). During the bending of the crystal mirror, no change in the position of the Bragg peak and spectral selectivity was found within the limits of the accuracy of measurements.