X-ray Schwarzschild objective for the carbon window (λ~45 nm)статья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 15 февраля 2024 г.
Аннотация:We deal with the recent progress in the fabrication of the graded Co/C multilayer mirrors to be used in a 21× Schwarzschild objective (SO) operating at the wavelengths near 4.5 nm (“carbon window” region). The peak reflectivity of flat Co/C mirrors was measured to be 14.8% (wavelength of 4.48 nm, incidence angle of 5°). The reflectivity curves of the spherical mirrors achieved 3%–6%, with the spectral matching accuracy being 𝛥𝑑∼0.008 nm (𝛥𝑑/𝑑∼0.3%). As a result the SO demonstrates a full working aperture (𝑁𝐴∼0.2) operation with the total throughput of 0.25%.