Experimental research of stability of thin films on the basis of depleted uranium as reflecting coating for wavelength of 4.5nm

Artioukov, Igor A.; Chefonov, O. V.; Gilev, O. N.; Lipin, A. V.; Ostashev, V.I.; Потапов, А. В.; Pronin, V. A.; Svyatov, I. L.; Vikhlyaev, D.A.; Виноградов, А. В.

doi:10.1016/j.nima.2007.01.080

Cited by 6 publications

(4 citation statements)

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“…Analysis shows that depleted uranium is a promising material for mirror coatings in the soft X-ray range and the EUV (extreme ultra-violet) region, and uranium thin films can be used in applications such as space telescopes and in multilayer mirrors [1][2][3][4]. Unfortunately, these thin films are highly unstable due to the rapid oxidation of uranium upon removal from vacuum.…”

Section: Introductionmentioning

confidence: 99%

“…This instability in uranium thin films has led to increased interest in uranium oxide thin films because of their stability and high reflectivity in some region of wavelength [2,3]. Experimentally, the optical properties of uranium-based mirrors have been studied since the early 1990s by different research teams [2][3][4][5][6][7][8][9][10][11]. However, at present there is no theoretical report about optical properties of the bulk UO 2 .…”

Section: Introductionmentioning

confidence: 99%

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First-principles study of the electronic structure and optical properties of UO2

Chen

Lai

Tang

et al. 2010

Journal of Nuclear Materials

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

First-principles study of the electronic structure and optical properties of UO2

Chen

Lai

Tang

et al. 2010

Journal of Nuclear Materials

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“…Recent analysis shows that uranium is also a promising material for mirror coatings in the soft X-ray range and the extreme ultra-violet (EUV) region, and that uranium thin films can be used in space telescopes and in multilayer mirrors. [1,2] Also, in nuclear industry, in order to evaluate the extent of oxidation for the surface, it is necessary to obtain the thickness of the oxide layer. For some conventional thickness-determination techniques like ellipsometric spectroscopy, optical constants such as refractive indices and extinction coefficients are the necessary parameters.…”

Section: Introductionmentioning

confidence: 99%

First-principles study of the elastic constants and optical properties of uranium metal

Chen¹,

Shiyong²,

Lai³

et al. 2012

Chinese Phys. B

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We perform first-principles calculations of the lattice constants, elastic constants, and optical properties for alpha- and gamma-uranium based on the ultra-soft pseudopotential method. Lattice constants and equilibrium atomic volume are consistent pretty well with the experimental results. Some difference exists between our calculated elastic constants and the experimental data. Based on the satisfactory ground state electronic structure calculations, the optical conductivity, dielectric function, refractive index, and extinction coefficients are also obtained. These calculated optical properties are compared with our results and other published experimental data.

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“…1 They are widely used in optical systems applied in astrophysics, [2][3][4] x-ray lithography, [5][6][7] x-ray microscopy (including both water [8][9][10][11] and carbon 12,13 windows), microanalysis, [14][15][16] and many other fields of science and technology. Requirements of a high reflectivity for such multilayers (MLs) as a rule define a specific material pair for construction.…”

Section: Introductionmentioning

confidence: 99%

Structural transformations in Sc/Si multilayers irradiated by EUV lasers

Voronov

Zubarev²,

Pershyn³

et al. 2007

SPIE Proceedings

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Multilayer mirrors for the extreme ultraviolet (EUV) are key elements for numerous applications of coherent EUV sources such as new tabletop lasers and free-electron lasers. However the field of applications is limited by the radiation and thermal stability of the multilayers. Taking into account the growing power of EUV sources the stability of the optics becomes crucial. To overcome this problem it is necessary to study the degradation of multilayers and try to increase their temporal and thermal stability. In this paper we report the results of detailed study of structural changes in Sc/Si multilayers when exposed to intense EUV laser pulses. Various types of surface damage such as melting, boiling, shock wave creation and ablation were observed as irradiation fluencies increase. Cross-sectional TEM study revealed that the layer structure was completely destroyed in the upper part of multilayer, but still survived below. The layers adjacent to the substrate remained intact even through the multilayer surface melted down, though the structure of the layers beneath the molten zone was noticeably changed. The layer structure in this thermally affected zone is similar to that of isothermally annealed samples. All stages of scandium silicide formation such as interdiffusion, solid-state amorphization, silicide crystallization etc., are present in the thermally affected zone. It indicates a thermal nature of the damage mechanism. The tungsten diffusion barriers were applied to the scandium/silicon interfaces. It was shown that the barriers inhibited interdiffusion and increased the thermal stability of Sc/Si mirrors.

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Experimental research of stability of thin films on the basis of depleted uranium as reflecting coating for wavelength of 4.5nm

Cited by 6 publications

References 1 publication

First-principles study of the electronic structure and optical properties of UO2

First-principles study of the electronic structure and optical properties of UO2

First-principles study of the elastic constants and optical properties of uranium metal

Structural transformations in Sc/Si multilayers irradiated by EUV lasers

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