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Генерация аврорального километрового излучения в неоднородной плазме магнитосферы
Geomagnetism and Aeronomy. 2017. Т. 57. № 1. С. 19-27.
Буринская Т. М., Шевелев М. М.
Буринская Т. М., Шевелев М. М., Plasma Physics Reports 2016 Т. 42 № 10 С. 884-890
В приближении геометрической оптики проведено исследование генерации, усиления и распространенияаврорального километрового излучения в узкой трехмерной плазменной каверне, в которой распространяется поток слаборелятивистских электронов. Показано, что наибольшим коэффициентом усиления обладают волны, имеющие направленную к Земле групповую скорость в момент их старта и оптимальное соотношение между компонентами волнового вектора, определяющими значение линейного инкремента и время пребывания внутри ...
Added: March 12, 2018
P.A. Bespalov, Savina O. N., Journal of Atmospheric and Solar-Terrestrial Physics 2019 Vol. 185 P. 58-67
Some aspects of the theory of generation of magnetospheric chorus are discussed. An original approach to solving the problem of oblique chorus generation near the Gendrin angle is outlined and partially realized within the framework of a beam pulsed amplifier mechanism. Parameters of the resonance electron beam in the chorus excitation region are determined theoretically. ...
Added: April 11, 2019
Peter Bespalov, Mizonova V., Annales Geophysicae 2017 Vol. 35 No. 3 P. 671-675
The problems of reflection and transmission of a whistler wave incident in the nighttime ionosphere from above are considered. Numerical solution of the wave equations for a typical condition of the lower ionosphere is found. The solution area comprises both the region of strong wave refraction and a sharp boundary of the nighttime ionosphere ( ...
Added: May 27, 2017
Bespalov P. A., Savilov A. V., Physics of Plasmas 2021 Vol. 28 No. 9 Article 093303
Cherenkov interaction between a wave pulse and a flow of electrons possessing a very wide (on the scale of the characteristic band of the resonant electron–wave interaction) velocity spread is considered. We show that if the wave pulse is short enough, and its group velocity is close to the phase velocity, then the effect of ...
Added: September 21, 2021
V. E. Shaposhnikov, Zaitsev V. V., Litvinenko G. V., JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 2018 Vol. 123 No. 11 P. 9395-9405
The ion cyclotron waves instability near the frequencies of ionic cyclotron harmonics is studied under conditions typical for the Jovian kilometer radio emission source. This instability is caused by the presence of the ions with a nonequilibrium loss cone-type distribution function in the source. Expressions for the growth rate of the ion cyclotron wave’s instability ...
Added: November 16, 2018
Bespalov P. A., Savina O. N., Misonova V., Journal of Atmospheric and Solar-Terrestrial Physics 2018 Vol. 175 P. 40-48
Trans-ionospheric propagation of the VLF electromagnetic wave from an altitude of 800 km to the Earth's surface is considered using the model of stratified media. The numerical solution of the wave equations for the mid-latitude ionosphere model conditions is found. The wave field in the lower ionosphere is calculated using the full-wave approach. The wave ...
Added: June 19, 2018
Streltsov A. V., Berthelier J. -., Chernyshov A. et al., Space Science Reviews 2018 Vol. 214 No. 8 P. 1-122
Active ionospheric experiments using high-power, high-frequency transmitters, heaters, to study plasma processes in the ionosphere and magnetosphere continue to provide new insights into understanding plasma and geophysical proceses. This review describes the heating facilities, past and present, and discusses scientific results from these facilities and associated space missions. Phenomena that have been observed with these ...
Added: November 28, 2019
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
Maevsky E., Кислов Р. А., Малова Х. В. et al., Ученые записки Физического факультета МГУ 2018 № 5 С. 1-10
Построена осесимметричная МГД–модель солнечного ветра, позволяющая исследовать в широком диапазоне гелиоширот пространственное распределение характеристик магнитного поля и плазмы на радиальных расстояниях от 20 до 400 радиусов Солнца. Получены самосогласованные решения для магнитного поля, плотностей плазмы и тока в солнечном ветре в зависимости от фазы солнечного цикла. Показано, что в период доминирования дипольной магнитной компоненты в ...
Added: October 5, 2019
Ильясов А. А., Chernyshov A., Могилевский М. М. et al., Химическая физика 2018 Т. 37 № 5 С. 37-42
Plasma instability caused by an inhomogeneous energy density distribution is considered. It is shown that this instability can lead to the excitation of electrostatic ion-cyclotron and oblique ion-acoustic waves, generated in the presence of an inhomogeneous transverse electric field and a shear in the parallel drift velocity of the plasma particles. The considered physical mechanisms ...
Added: November 28, 2019
Shklyar D., JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 2018 Vol. 123 P. 7077-7088
U-shaped spectrograms observed by the DEMETER satellite in the equatorial region of the upper ionosphere are presented and explained for the first time. These spectra are characterized by the latitude-dependent upper cutoff frequency that increases with the latitude during nighttime. The observations suggest that this very low frequency wave phenomenon is closely connected with the anomalous increase in cold ...
Added: October 31, 2018
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
Головчанская И. В., Козелов Б. В., Chernyshov A. et al., Геомагнетизм и аэрономия 2018 Т. 58 № 2 С. 234-240
Satellite observations show that the electrostatic instability, which is expected to occur in most cases due to an inhomogeneous energy density caused by a strongly inhomogeneous transverse electric field (shear of plasma convection velocity), occasionally does not develop inside nonlinear plasma structures in the auroral ionosphere, even though the velocity shear is sufficient for its ...
Added: November 28, 2019
Chernyshov A., Ильясов А. А., Могилевский М. М. et al., Геомагнетизм и аэрономия 2017 Т. 57 № 3 С. 333-342
The broadband electrostatic turbulence generally observed in the high-latitude ionosphere is a superposition of nonlocal waves of ion-acoustic and ion-cyclotron types. In the presence of a shear of ion parallel velocity, ion-acoustic modes can be induced by an instability emerging due to an inhomogeneous distribution of energy density. This paper is devoted to the studies ...
Added: November 28, 2019
Чугунин Д. В., Клименко М. В., Chernyshov A. et al., Геомагнетизм и аэрономия 2018 Т. 58 № 1 С. 53-65
In this paper, measurements of thermal and superthermal ions on the Interball-2 satellite are compared with the results of numerical simulation based on geomagnetic disturbances on December 7, 1996. It is shown that kinetic processes at small scales can have a significant effect on large-scale processes in high latitudes, leading to heating and the formation ...
Added: November 28, 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
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
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
Ерохин Н. С., Артеха С. Н., Н.С. Артеха, Инженерная физика 2019 Т. 8 С. 3-9
Исследование взаимодействия электромагнитных волн с неоднородной плазмой позволяет значительно улучшить существующие представления о динамике волн в
сильно неоднородных и нестационарных диэлектрических средах, а также имеет большое значение для различных практических приложений, таких как нагрев
плазмы, диагностика и интерпретация экспериментальных данных. Представляет интерес анализ возможностей реализации безотражательного прохождения волн через волновые барьеры на основе разработки точно решаемых физикоматематических ...
Added: May 18, 2023
Shklyar D., Титова Е. Е., Геомагнетизм и аэрономия 2017 Т. 57 № 1 С. 28-35
We study the interaction between energetic protons of the Earth’s radiation belts and quasi-electrostatic whistler mode waves. The nature of these waves is well known: whistler waves, which are excited in the magnetosphere due to cyclotron instability, enter the resonant regime of propagation and become quasielectrostatic, while their amplitude significantly increases. Far enough from the ...
Added: January 2, 2018
Shustov P., Артемьев А., Юшков Е. et al., Физика плазмы 2018 Т. 44 № 8 С. 642-651
Современные спутниковые наблюдения указывают на наличие в магнитосфере Земли большого числа магнитных дыр – пространственно локализованных областей с пониженным значением амплитуды магнитного поля. Магнитные дыры характеризуются повышенным относительно фонового значения плазменным давлением и сильными электрическими токами, протекающими по границе дыр. Существует несколько численных и аналитических моделей, описывающих двухмерные конфигурации магнитных дыр, однако трехмерное распределение магнитных ...
Added: February 3, 2020
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