Multilayer coating for 30.4nm

Yoshikawa, Ichiro; Murachi, Tetsunori; Takenaka, Hisataka; Ichimaru, Setsuo

doi:10.1063/1.1938867

Cited by 31 publications

(4 citation statements)

References 10 publications

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“…SiC/Mg MISs attract research interest owing to a unique combination of high reflectance (more than 40% [44,45]), fine spectral selectivity, thermal stability (up to 350 • C), and almost zero stress [45][46][47][48].…”

Section: Selection Of Mis Materialsmentioning

confidence: 99%

“…The extension of sensitivity to E ∼ 200 keV is of particular interest, since several key nuclear transitions of radioactive elements produced in supernova explosions lie between 50 and 200 keV. For example, decays of 44 Ti (68 and 78 keV) and 56 Ni (158 keV) are of interest, since the production and ejection of 44 Ti are sensitive to the explosion mechanism, and the temporal evolution of intensity of the 56 Ni line is sensitive to the structure and dynamics of ejection [147].…”

Section: Telescopes Based On Gradient Missmentioning

confidence: 99%

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Focusing diffraction optics for orbital telescopes

Лидер

2022

Optics and Spectroscopy

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The review is devoted to the principles, state of the art and problems of diffractive optics used to focus X-ray and γ-radiation in telescopes at orbital stations. Various multilayer structures for normal incidence telescopes, supermirrors for Wolter optics, Laue lens as a soft γ-radiation concentrator, as well as modified Fresnel zone plates for focusing radiation in a wide energy range with an unprecedented high angular resolution (10-1-10-3''). Keywords: X-ray and γ-radiation, X-ray and γ-telescopes, diffraction, multilayer structures, Laue lens, Fresnel zone plates.

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Section: Selection Of Mis Materialsmentioning

confidence: 99%

Section: Telescopes Based On Gradient Missmentioning

confidence: 99%

Focusing diffraction optics for orbital telescopes

Лидер

2022

Optics and Spectroscopy

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“…Different Mg based MLs have been investigated, including Mg/Co, Mg/C, Mg/B 4 C, Mg/Si and Mg/SiC. [101][102][103][104] Among those, Mg/SiC is one of the most promising because its theoretical reflectance approaches 60% at 30.4 nm, with a spectral band of only 1.4 nm: in fact, in the 26-35 nm wavelength range, Mg/SiC structure gives higher reflectance and narrower bandpass than both the standard Mo/Si and any other material pair. Furthermore, Mg/SiC shows also a natively nearzero stress and a high thermal stability up to 350 C, definitely making this structure superior of any other material pairs in the >25 nm wavelength region.…”

Section: Mg-based Euv ML Structuresmentioning

confidence: 99%

Extreme Ultraviolet Multilayer Nanostructures and Their Application to Solar Plasma Observations: A Review

Corso

Pelizzo

2019

j nanosci nanotechnol

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The advent of nanoscale multilayer (ML) technology has led to great breakthroughs in many scientific and technological fields such as nano-manufacturing, bio-imaging, atto-physics, matter physics and solar physics. ML nanostructures are an enabling technology for the development of mirrors and reflective gratings having high efficiency at normal incidence in the extreme ultraviolet (EUV) range, a spectral region where conventional coatings show a negligible reflectance. In solar physics, ML mirrors have proved to be key elements for both imaging and spectroscopy space instruments, as they allow to make observations of EUV solar plasma emissions with spatial and spectral resolutions never reached before. ML-based instruments have been used in many of the major solar satellites and have flown in numerous sounding rocket experiments; moreover, in the last two decades many studies were performed in order to develop ML structures with increasingly better performance for future solar missions. In this paper, a review of the most promising ML nanostructures developed so far and applied to the observation of solar plasma emission lines is presented. After a brief recall of ML theory, a detailed discussion of the most promising material pairs and layer stack structures proposed and applied to past and current space missions will be presented; in particular, the review will focus on the ML structures having high efficiency in the 6 nm-35 nm wavelength range. Finally, the ML stability to low energy ion bombardment will be discussed.

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“…This makes Mg a promising material for filters and multilayer coatings in energies below the L 3 edge. In fact, several groups have recently developed multilayers based on Mg. [1][2][3][4][5][6][7] The EUV properties of Mg films have been investigated by several authors. Sabine 8 measured the reflectivity of magnesium films evaporated over a film of chromium in the 2.6-31.0 eV energy range.…”

Section: Introductionmentioning

confidence: 99%

Optical constants of magnetron-sputtered magnesium films in the 25–1300 eV energy range

Vidal-Dasilva

Aquila

Gullikson

et al. 2010

Journal of Applied Physics

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The transmittance of dc magnetron-sputtered Mg thin films was measured in the 25-1300 eV spectral range. Freestanding Mg films protected with Al layers were characterized ex situ. Transmittance measurements were used to obtain the extinction coefficient k of Mg films. The obtained k values along with the data available in the literature, and with interpolations and extrapolations for the rest of the spectrum, were used to obtain the real part of the index of refraction n by the Kramers-Krönig analysis. Sum-rule tests indicated a good consistency of the data.

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Multilayer coating for 30.4nm

Cited by 31 publications

References 10 publications

Focusing diffraction optics for orbital telescopes

Focusing diffraction optics for orbital telescopes

Extreme Ultraviolet Multilayer Nanostructures and Their Application to Solar Plasma Observations: A Review

Optical constants of magnetron-sputtered magnesium films in the 25–1300 eV energy range

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