Abstract:
The reflection spectra of several concave (spherical and parabolic) periodic Mo/Si, Mg/Si, and Al/Zr multilayer mirrors intended for cosmic experiments were studied with the help of a laser-plasma soft X-ray radiation source. An investigation was made of the reflection spectra of a laboratory aperiodic Mo/Si multilayer mirror optimised for maximum uniform reflectivity in the 125—250-Å range. 'Satellites' were observed in the neighbourhood of the principal peak in the spectrum of the periodic 132-Å multilayer mirror. High-intensity second-order interference reflection peaks at wavelengths of about 160 Å were experimentally revealed in the reflection spectra of the periodic Mo/Si 304-Å mirrors. By contrast, the second-order reflection peak is substantially depressed in the spectra of the narrow-band mirrors based on the Mg/Si multilayer structure. The experimental data are compared with theoretical calculations. Manifestations of the NEXAFS structure of the L2,3 absorption edges of Al and Al2O3 were observed in the spectra recorded.
Citation:
E. A. Vishnyakov, K. N. Mednikov, A. A. Pertsov, E. N. Ragozin, A. A. Reva, A. S. Ulyanov, S. V. Шестов, “Measurements of reflection spectra of soft X-ray multilayer mirrors using a broadband laser-plasma radiation source”, Kvantovaya Elektronika, 39:5 (2009), 474–480 [Quantum Electron., 39:5 (2009), 474–480]
Linking options:
https://www.mathnet.ru/eng/qe13902
https://www.mathnet.ru/eng/qe/v39/i5/p474
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