НА

Н. А. Коваленко

Lomonosov Moscow State University

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I. A. Uspenskaya

Lomonosov Moscow State University

S. V. Kurdakova

Lomonosov Moscow State University

Alexey S. Maliutin

Lomonosov Moscow State University

KА

Konstantin А. Lyssenko

National Research University Higher School of Economics

Ivan V. Mikheev

Lomonosov Moscow State University

Julia D. Shakirova

Lomonosov Moscow State University

Ekaterina V. Belova

Lomonosov Moscow State University

АВ

А. В. Нестеров

Lomonosov Moscow State University

K. A. Pavlov

Petersburg Nuclear Physics Institute

Anatoly S. Arkhipin

Lomonosov Moscow State University

Cooperative Institutions

Kurchatov Institute

Lomonosov Moscow State University

Russian Academy of Sciences

Institute for Theoretical and Experimental Physics

Petersburg Nuclear Physics Institute

Moscow State University

St Petersburg University

Kharkiv Institute of Physics and Technology

Joint Institute for Nuclear Research

Moscow Engineering Physics Institute

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Beam optics of the accelerating-storage complex LA-SR-2000

IEEE Transactions on Magnetics (1988)

P. Gladkikh A. N. Dovbnya Sergey Efimov A. Yu. Zelinskij I.M. Karnaukhov

Calculation results are presented for the injection and extraction beam lines of the SR-2000 stretcher ring and for the parallel beam-transfer system of the LA-200 linac. The beam transport lines incorporate spin rotators and an energy compression system which reduces electron energy spread to 0.1-0.2%. The spin rotators control spin orientation in the operating energy range of the stretcher. Principal characteristics and design features of the electron optical lattice of the LA-SR-2000 linac-stretcher complex are described. The calculations including second-order aberrations indicate that the slightly increased beam emittance was due to the electron energy spread. To compensate for the quadratic effects, sextupole lenses will be installed in the beam channels.< >

Beam optics

Beam emittance

10.1109/20.11485

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Effect of preparation method on the properties of deposited copper-palladium deep-oxidation catalysts

Journal of Applied Spectroscopy (1998)

T. S. Petkevich Yu. G. Egiazarov Н. А. Коваленко T. L. Sen’ko

Deposition

10.1007/bf02674797

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Thermodynamic Model of the H₂O–H₂SO₄–UO₂SO₄ System Incorporating Novel Experimental Data on Water Activity

Journal of Chemical & Engineering Data (2023)

Aleksei S. Maliutin Н. А. Коваленко А. В. Нестеров Vladimir G. Petrov Irina A. Uspenskaya

Activity of water in aqueous solutions containing sulfuric acid and uranyl sulfate has been determined at 298.15, 310.65, and 323.15 K by means of the apparatus AQUALAB 4TE. The data obtained, along with literature information about activity of water and solid–liquid equilibria in the H2O–UO2SO4 and H2O–H2SO4–UO2SO4 systems, were used to develop a thermodynamic model of the ternary system mentioned. The resulting model, employing Pitzer–Simonson–Clegg (PSC) equations to represent the properties of a liquid phase, is valid within a wide range of temperatures and concentrations. Apart from introducing novel experimental data and a thermodynamic model, the reported study discusses advantages and disadvantages of the PSC-based thermodynamic descriptions of the H2O–H2SO4 subsystem presented in the literature.

Ternary numeral system

10.1021/acs.jced.3c00061

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Mathematical model of biological tissue surface based on one dimensional stochastic process of fractional Brownian motion

Journal of Physics Conference Series (2021)

А В Смирнов Н. А. Коваленко O Ryabushkin

Abstract In this work the model for the profiling of biological tissue surfaces is introduced. The surface was considered as the realization of the stochastic process of the fractional Brownian motion (fBm) with the scale parameter σ and Hurst index H. The contour of the epidermal surface of the normal cut banana peel was studied. The magnified digital photos of the investigated specimens were made using the microscope (spatial resolution 1 μm) with the built-in camera. The function that linearly interpolated the surface contour was derived. The dispersion law of the differences between the values of the interpolating function in the adjacent knots was in good agreement with that one of the fBm stochastic process. The values of σ=0.1 and H=0.806 were obtained.

Fractional Brownian motion

Stochastic modelling

Realization (probability)

Hurst exponent

10.1088/1742-6596/1740/1/012016

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Liquid–Liquid Equilibria in the Water–Nitric Acid–Europium Nitrate–Gadolinium Nitrate–Tributyl Phosphate System at 298.15 K

Journal of Chemical & Engineering Data (2021)

Anatoly S. Arkhipin А. В. Нестеров Н. А. Коваленко Irina A. Uspenskaya

Liquid–liquid equilibria in the H2O–HNO3–Eu(NO3)3–Gd(NO3)3–tributyl phosphate (TBP) system and in two H2O–HNO3–Ln(NO3)3–TBP (Ln = Eu, Gd) subsystems have been investigated at 298.15 K in a wide range of nitric acid and rare earth elements (REEs) concentrations. The total compositions of the extraction systems and the content of REEs and nitric acid in equilibrium phases are presented. Densities of solutions in two subsystems have been measured. The distribution coefficients of REEs and nitric acid and the separation factor of REEs in equilibrium phases have been determined. The obtained experimental data can be further used for thermodynamic modeling of systems that are promising for the extraction separation of REEs.

Nitric acid

Tributyl phosphate

Europium

Liquid–liquid extraction

10.1021/acs.jced.0c01006

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Scattering and absorption coefficients measurements in silicone polymers used in fiber optics

Journal of Physics Conference Series (2021)

Renata Ismagilova Renat Shaidullin I. Khramov Н. А. Коваленко A. V. Ryabushkin

Abstract Scattering and absorption coefficients of organosilicon polymers (polysiloxanes) used in fiber optics were investigated. For this purpose a new measurement technique based on relocatable integrating spheres was implemented. A computer mathematical model of light propagation in a scattering medium was created based on the Monte Carlo method. The experimental results were approximated using this model in order to obtain absorption and scatterring characteristics of different polymer samples.

Organosilicon

10.1088/1742-6596/1919/1/012012

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Effect of the Support on the Copper State in Copper-Titanium Oxidation Catalysts

Studies in surface science and catalysis (1993)

T. S. Petkevich L. Ya. Mostovaya Yu. G. Egiazarov Н. А. Коваленко

Oxidation state

10.1016/s0167-2991(08)64239-1

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Study on some methods of the decreasing of the beam emittance on the exit beam transport system