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Трехмерная модель магнитных дыр в бесстолкновительной плазме
Физика плазмы. 2018. Т. 44. № 8. С. 642-651.
Shustov P., Артемьев А., Юшков Е., Васько И.
Shustov P., Artemyev A., Vasko I. et al., Plasma Physics Reports 2018 Vol. 44 No. 8 P. 729-737
Recent multispacecraft observations in the Earth’s magnetosphere have revealed an abundance of magnetic holes—localized magnetic field depressions. These magnetic holes are characterized by the plasma pressure enhancement and strongly localized currents flowing around the hole boundaries. There are several numerical and analytical models describing 2D configurations of magnetic holes, but the 3D distribution of magnetic ...
Added: February 3, 2020
Shustov P., Artemyev A., Vasko I. et al., Physics of Plasmas 2016 Vol. 23 P. 122903-1-122903-88
Magnetic holes are magnetoplasma structures very similar to the classical h–pinch. They are widely observed in the space plasma and identified by the substantial magnetic field depressions on scales from magnetohydrodynamic range to electron scales. In this paper, we develop the kinetic models of cylindrically symmetric magnetic holes with sub-ion scales using two types of ...
Added: February 3, 2020
Shustov P., Artemyev A., Volokitin A. et al., Physics of Plasmas 2022 Vol. 29 No. 012902 P. 1-10
Recent observations of hot plasma in Earth's magnetotail and magnetosheath demonstrate nonlinear sub-ion scale magnetic holes, spatially localized dips of magnetic field intensity. These structures resemble magnetosonic solitary waves, but do not include any significant density perturbations. Instead, the magnetic field depression is balanced by hot electron pressure. This study aims to investigate linear modes ...
Added: June 15, 2022
Maevsky E., Кислов Р. А., Малова Х. В. et al., Plasma Physics Reports, (Российская Федерация) 2018 Vol. 44 No. 1 P. 80-91
The spatial distributions of the magnetic field, plasma density, and current at distances of (20−400) RS from the Sun (where RS is the solar radius) are investigated within a stationary axisymmetric MHD model of the solar wind (SW) at all latitudes in the inertial frame of reference with the origin at the center of the ...
Added: September 26, 2019
Maevsky E., Кислов Р. А., Малова Х. В. et al., Физика плазмы 2018 Т. 44 № 1 С. 89-101
В рамках стационарной осесимметричной МГД-модели солнечного ветра исследованы пространственное распределение магнитного поля, плотностей плазмы и тока на расстояниях от 20 до 400RS (радиусов Солнца) на всех гелиоширотах в инерциальной системе отсчета с началом в центре Солнца. В модели учтены неравномерное по гелиошироте вращение Солнца и полная коротация плазмы внутри граничной сферы радиусом в 20RS, нарушающаяся ...
Added: September 26, 2019
Petrukhin N., Ruderman M., Astronomy and Astrophysics 2018 Vol. 620 No. A44 P. 1-9
We study damping of phase-mixed Alfvén waves propagating in axisymmetric magnetic plasma configurations. We use the linear magnetohydrodynamic (MHD) equations in the cold plasma approximation. The only dissipative process that we take into account is shear viscosity. We reduce the MHD equations describing the Alfvén wave damping to a Klein–Gordon-type equation. We assume that the ...
Added: December 7, 2018
Zybin K., Ilyin A., Сирота В. А. et al., EPL 2020 Vol. 132 P. 24001
Evolution of a stochastically homogeneous magnetic field advected by an incompressible turbulent flow with large magnetic Prandtl numbers is considered at scales smaller than the Kolmogorov viscous scale. It is shown that, despite the unlimited growth of the magnetic field, its feedback on the fluid's dynamics remains negligibly small. ...
Added: December 23, 2020
Golikov E. A., V.V. Izmodenov, Alexashov D. B. et al., Monthly Notices of the Royal Astronomical Society 2017 Vol. 464 No. 1 P. 1065-1076
Opher et al., Drake, Swisdak and Opher have shown that the heliospheric magnetic field results in formation of two-jet structure of the solar wind flow in the inner heliosheath, i.e. in the subsonic region between the heliospheric termination shock (TS) and the heliopause. In this scenario, the heliopause has a tube-like topology as compared with a ...
Added: January 26, 2018
Vinogradova A. S., Naletova V., Turkov V., Physics Procedia 2010 No. 9 P. 68-73
In this paper the behavior (break-up and creation) of a magnetic fluid bridge between two coaxial cylinders in a magnetic field of a line
conductor for any values of wetting angles of a magnetic fluid is investigated. ...
Added: November 26, 2012
Maevsky E., Кислов Р. А., Малова Х. В. et al., Космические исследования 2018 Т. 56 № 6 С. 394-403
В рамках осесимметричной МГД-модели солнечного ветра проведен анализ магнитного поля Солнца в двух фазах солнечного цикла: минимума активности, когда доминирует дипольное магнитное поле и максимума, когда преобладает квадрупольное поле. Показано, что в период максимума солнечной активности гелиосферный токовый слой приобретает конусообразную форму и смещается в область высоких широт до 30 градусов над плоскостью эклиптики. В противоположном ...
Added: October 5, 2019
Kopyev A. V., Ilyin A., Sirota V. A. et al., Physics of Fluids 2022 Vol. 34 No. 3 Article 035126
We consider the kinematic stage of evolution of magnetic field advected by turbulent hydrodynamic flow. We use a generalization of the Kazantsev–Kraichnan model to investigate time irreversible flows. In the viscous range of scales, the infinite-time limit of the spectrum is a power law, but its slope is more flat than that predicted by the ...
Added: March 19, 2022
Ilyin A., Kopyev A. V., Sirota V. A. et al., Physics of Fluids 2020 Vol. 32 No. 12 P. 125114
We consider fluctuations of magnetic field excited by external force and advected by isotropic turbulent flow. It appears that non-Gaussian velocity gradient statistics and finite region of pumping force provide the existence of stationary solution. The mean-square magnetic field is calculated for arbitrary velocity gradient statistics. An estimate for possible feedback of magnetic field on ...
Added: December 16, 2020
Буринская Т. М., Шевелев М. М., Geomagnetism and Aeronomy 2017 Т. 57 № 1 С. 19-27
Проведено исследование генерации аврорального километрового излучения в узкой трехмерной плазменной каверне, в которой на фоне пониженной плотности холодной фоновой плазмы распространяется поток слаборелятивистских электронов вдоль магнитного поля. Используя уравнения геометрической оптики, рассмотрена временная динамика распространения и усиления волн с разными компонентами волновых векторов, стартующих из центра каверны на высоте порядка земного радиуса при плазменных параметрах ...
Added: March 12, 2018
Ilyin A., Kopyev A. V., Sirota V. A. et al., Physics of Fluids 2021 Vol. 33 No. 7 P. 075105-1-075105-10
Kinematic dynamo in incompressible isotropic turbulent flows with high magnetic Prandtl number is considered. The approach interpreting an arbitrary magnetic field distribution as a superposition of localized perturbations (blobs) is developed. We derive a general relation between stochastic properties of an isolated blob and a stochastically homogenous distribution of magnetic field advected by the same ...
Added: July 20, 2021
Shustov P., Nishimura Y., Artemyev A. et al., Journal of Atmospheric and Solar-Terrestrial Physics 2020 Vol. 208 P. 105365
The magnetotail dipolarization during substorms is a mesoscale dynamical phenomenon, well documented by in-situ spacecraft observations, numerical simulations, and ground-based optical measurements. The magnetic energy release during substorms results in significant plasma heating and the formation of strong temperature and density gradients behind the dipolarization front. Such gradients are the source of many plasma instabilities ...
Added: December 12, 2020
Shustov P., Zhang X., Pritchett P. L. et al., JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 2019 Vol. 124 No. 1 P. 342-359
Magnetic energy release during magnetic reconnection in the magnetotail leads to fast plasma flows transporting thermal energy toward the inner magnetosphere or deep tail. The interaction of such flows with the ambient plasmas is controlled by forces at the flow's leading edge, manifested as a sharp enhancement of the south‐north component of magnetic field there, ...
Added: January 31, 2020
Lukin A.S., Artemyev A. V., Petrukovich A. A. et al., JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 2019 Vol. 124 No. 7 P. 5027-5041
One of the most important sources of magnetospheric plasma is particle entry through the distant magnetotail boundary, the nightside magnetopause. This entry mechanism depends on the magnetopause configuration. Off the equator, the strong lobe magnetic field renders the magnetopause a tangential or a rotational discontinuity, and thus the magnetosheath field orientation predominantly controls particle entry ...
Added: January 31, 2020
Maevsky E., Кислов Р. А., Малова Х. В. et al., Cosmic Research 2018 Vol. 56 No. 6 P. 411-419
Abstract—Within the axisymmetric MHD model of the solar wind, the magnetic field of the Sun has been analyzed in two phases of the solar cycle: the minimum activity, when the dipole magnetic field dominates and the maximum activity, when the quadrupole field predominates. It has been shown that during the period of maximum solar activity, ...
Added: October 5, 2019
Ruderman M. S., Petrukhin N., Solar Physics 2022 Vol. 297 No. 6 Article 72
In this article we study the effect of a transitional layer in a magnetic tube on the real part
of the frequencies of kink oscillations. In our analysis, we use the model of a straight magnetic tube with the density and cross-section radius varying along the loop, and the thin-tube
thin-boundary (TTTB) approximation. First, we calculate the ...
Added: July 11, 2022
Ruderman M., Petrukhin N., Astronomy and Astrophysics 2019 Vol. 631 P. A31-1-A31-12
ABSTRACT
The effect of siphon flow on kink oscillations of magnetic flux tubes is studied in the thin tube and thin boundary layer (TTTB) approximation. The presence of a transitional layer results in oscillation damping due to resonance absorption. To calculate the damping rate we use the regular perturbation method with the ratio of transitional layer ...
Added: October 17, 2019
Морозов Г. В., Математическое моделирование 1990 Т. 2 № 7 С. 20-27
The plasma contactor model is described. The length of effective collection radius for electric current, the current limit and the nessesary potential difference are culculated in the case of spherical symmetry. The magnetic field influence on the collection radius length is analised. For the plane perpendecular to the magnetic field the calculation of plasma cloud ...
Added: October 1, 2015
Katushkina O. A., Quemerais E., Izmodenov V.V. et al., JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 2017 Vol. 122 No. 11 P. 10921-10937
In this work, we present for the first time the Lyman α intensities measured by Voyager 1/UVS in 2003–2014 (at 90–130 AU from the Sun). During this period Voyager 1 measured the Lyman α emission in the outer heliosphere at an almost fixed direction close to the upwind (i.e.“ toward the interstellar flow). The data show an unexpected behavior in 2003–2009: the ...
Added: January 26, 2018
Aaij R., Abdelmotteleb A. S., Abellan Beteta C. et al., The European Physical Journal C - Particles and Fields 2023 Vol. 83 Article 543
https://link.springer.com/article/10.1140/epjc/s10052-023-11673-x#Abs1 ...
Added: December 4, 2023
Ружицкая Д. Д., САМОЙЛЕНКО А. А., Иванов А. Д. et al., Optoelectronics, Instrumentation and Data Processing 2017 Vol. 54 No. 1 P. 1-8
This paper presents an algorithm for processing the transmission spectra of whisperinggallery optical microcavities for use as a nanoparticle detector. The algorithm is based on the broadening of the microcavity resonance curve during precipitation of nanoparticles on the microcavity surface. Experimental results on the detection of particles are compared with Langmuir adsorption theory. The contribution ...
Added: May 25, 2018