X-ray optical system for imaging laser plumes with a spatial resolution of up to. (April 2016)

• Record Type: Journal Article
• Authors: Nechai, A.N.; Pestov, A.E.; Polkovnikov, V.N.; Salashchenko, N.N.; Toropov, M.N.; Chkhalo, N.I.; Tsybin, N.N.; Shcherbakov, A.V.
• Is Part Of: Quantum electronics. Volume 46:Number 4(2016)
• Page Start: 347
• Page End: 352
• Publication Date: 2016-04
• Subjects: laser-produced plasma -- soft X-ray radiation -- Schwarzschild objective -- X-ray image -- scintillator -- aspherics, multilayer mirrors; Quantum electronics -- Periodicals; 537.5
• DOI: 10.1070/QEL16049
• Languages: English
• ISSNs: 1063-7818

Abstract

Abstract: We consider an X-ray optical system which permits obtaining laser plume images at a wavelength of with a resolution of up to . The X-ray optical system comprises an X-ray Schwarzschild objective made up of two aspherical multilayer mirrors, a scintillator (YAG : Ce ceramics), which converts X-rays to the visible radiation, and a visible-optical system, which images the scintillator surface onto a CCD camera. The spatial resolution of the system is limited by the resolution of the optical system and the magnification of the X-ray objective and is as high as . The effect of Schwarzschild objective mirror shapes on the spatial resolution is analysed. The profile of concave mirror aspherisation is considered, which provides the attainment of the diffraction-limited quality of the objective. Data are given for the quantum efficiency of the system at a wavelength of . We describe the experimental test bench intended for studying the developed X-ray optical system and outline the first experimental data which illustrate its efficiency. Owing to the natural division into the 'X-ray' and 'visible' parts, the optical system under discussion permits an easy change of the magnification and the field of view without realigning the X-ray optical elements. The wavelength may be varied in a range between 3 and by changing the multilayer mirrors.