EUV telescope for a Cubesat nanosatellite.

This paper describes in detail a compact (2U format) telescope operating in the extreme ultraviolet range for studying the solar corona at a wavelength of 17.14 nm. The telescope objective has been built according to the Ritchey-Chrétien scheme with the following parameters: effective focal length of 381.

High-aperture EUV microscope using multilayer mirrors and a 3D reconstruction algorithm based on z-tomography.

The article is devoted to the development of an EUV microscope using a wavelength of 13.84 nm. Due to the use of a mirror lens with a large numerical aperture, NA = 0.

Reflecting properties of narrowband Si/Al/Sc multilayer mirrors at 58.4 nm.

This study considers the reflective characteristics of three-component Si/Al/Sc multilayer mirrors with a protective cap layer as candidates for telescopes for observation of the solar corona in the He I (=58.4) spectral line. At 58.

High-resolution laboratory reflectometer for the study of x-ray optical elements in the soft and extreme ultraviolet wavelength ranges.

A high-resolution laboratory reflectometer designed for operation in the soft x-ray (SXR) and extreme ultraviolet (EUV) ranges is described. High spectral resolution, up to 0.028 nm, in a wide spectral range is achieved due to the Czerny-Turner monochromator.

Optical constants of sputtered beryllium thin films determined from photoabsorption measurements in the spectral range 20.4-250 eV.

In this work, the refractive index of beryllium in the photon energy range 20.4-250 eV was experimentally determined. The initial data include measurements of the transmittance of two free-standing Be films with thicknesses of 70 nm and 152 nm, as well as reflectometric measurements of similar films on a substrate.