Design of a High-Resolution VLS Monochromator for Synchrotron Radiation

A high-resolution monochromator with a broad spectral range of 125–4200 Å is designed for a measuring beamline of the projected synchrotron radiation source “SKIF” (Novosibirsk). The optical configuration of the monochromator comprises a grazing-incidence concave mirror, a plane VLS grating, and an...

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Bibliographic Details
Published in:Technical physics 2024, Vol.69 (2), p.392-398
Main Authors: Shatokhin, A. N., Vishnyakov, E. A., Kolesnikov, A. O., Nikolenko, A. D., Ragozin, E. N.
Format: Article
Language:English
Subjects:
Classical and Continuum Physics
Configurations
Gratings (spectra)
Grooves
High resolution
Physics
Physics and Astronomy
Radiation
Radiation sources
Ray tracing
Resolution
Synchrotron radiation
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Summary:A high-resolution monochromator with a broad spectral range of 125–4200 Å is designed for a measuring beamline of the projected synchrotron radiation source “SKIF” (Novosibirsk). The optical configuration of the monochromator comprises a grazing-incidence concave mirror, a plane VLS grating, and an exit slit. It is planned to use two replaceable VLS gratings with central groove frequencies of 600 and 150 mm –1 intended for subranges of 125–1000 Å and 900–4200 Å, respectively. Wavelength tuning in each of the two subranges is carried out by solely the rotation of the VLS-gratings. Due to the proper choice of p 1 VLS-grating coefficients, the focal distance varies only slightly over the entire spectral range, and the p 2 VLS-grating coefficients are used to suppress the aberrations of the mirror and the gratings. The resolving power of the configuration obtained by numerical ray tracing exceeds 1000 in the 125–1000 Å range and 2000 in the 900–4200 Å range.
ISSN:1063-7842
1090-6525
DOI:10.1134/S1063784224010365