Search Publications
Role of Oxygen Ions in the Structure of the Current Sheet of the Near-Earth Magnetotail
Zelenyi, L. M.; Malova, Kh. V.; Mingalev, I. V. +5 more
A numerical model is used to study the possibility of a thin current sheet formation in the near-Earth magnetotail in the growth phase of a substorm for a wide range of parameters of longitudinal countermoving ion flows that create current sheet. The simulation results make it possible to conclude that the current sheet can be formed by oxygen ion…
Albert Galeev: The Problem of Metastability and Explosive Reconnection
Popov, V. Yu.; Zelenyi, L. M.; Grigorenko, E. E. +2 more
−Albert Abubakirovich Galeev is a Soviet and Russian expert in plasma physics who actively contributed to fusion research. In the early 1970s, he became a head of department at the Space Research Institute of the Academy of Sciences of USSR and began devoting most of his time to the problems of the physics of space plasma and made a very important…
Hall Effect in Laboratory and Space Current Sheets
Petrukovich, A. A.; Nakamura, R.; Artemyev, A. V. +2 more
The role of the Hall effect in the formation of thin current sheets (CSs) is analyzed by comparing results of laboratory and satellite experiments. In spite of the strong difference in the plasma parameters, both laboratory and space CSs are characterized by the hot ion component and cold isotropic electron component. Such a relation between the i…
3D Magnetic Holes in Collisionless Plasmas
Artemyev, A.; Vasko, I.; Yushkov, E. +1 more
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 describin…
Time Evolution of the Macroscopic Characteristics of a Thin Current Sheet in the Course of Its Formation in the Earth's Magnetotail
Malova, H. V.; Popov, V. Yu.; Domrin, V. I.
A numerical model is developed that allows tracing the time evolution of a current sheet from a relatively thick current configuration with isotropic distributions of the pressure and temperature in an extremely thin current sheet, which plays a key role in geomagnetic processes. Such a configuration is observed in the Earth's magnetotail in the s…
Adiabatic Heating of Electrons in the Magnetospheric Current Sheet
Petrukovich, A. A.; Artemyev, A. V.; Lukin, A. S. +1 more
Electron dynamics and acceleration in an electromagnetic field configuration modeling the current sheet configuration of the Earth's magnetotail region is investigated. A focus is made on the role of the dawn‑dusk magnetic field component By in the convection electron heating by an electric field Ey. For numerical integration…
Generation of auroral kilometric radiation by a finite-size source in a dipole magnetic field
Burinskaya, T. M.; Shevelev, M. M.
Generation, amplification, and propagation of auroral kilometric radiation in a narrow three-dimensional plasma cavity in which a weakly relativistic electron beam propagates is studied in the geometrical optics approximation. It is shown that the waves that start with a group velocity directed earthward and have optimal relation between the wave …
Formation of a quasi-one-dimensional current sheet in the laboratory experiment and in the Earth's magnetotail
Petrukovich, A. A.; Artemyev, A. V.; Vasko, I. Y. +2 more
Two-dimensional current sheets (CSs) generated in the CS-3D laboratory device are considered. Results obtained in the laboratory experiment are compared with spacecraft observations of CSs in the Earth's magnetotail. The longitudinal and transverse CS structures, as well as CS evolution during the thinning process are studied. It is demonstrated t…
A possible mechanism of the enhancement and maintenance of the shear magnetic field component in the current sheet of the Earth's magnetotail
Malova, H. V.; Zelenyi, L. M.; Malykhin, A. Yu. +1 more
The influence of the shear magnetic field component, which is directed along the electric current in the current sheet (CS) of the Earth's magnetotail and enhanced near the neutral plane of the CS, on the nonadiabatic dynamics of ions interacting with the CS is studied. The results of simulation of the nonadiabatic ion motion in the prescribed mag…
Modeling of different scenarios of thin current sheet equilibria in the Earth's magnetotail
Malova, H. V.; Popov, V. Yu.; Zelenyi, L. M. +1 more
The Earth's magnetosphere is an open dynamic system permanently interacting with the solar wind, i.e., the plasma flow from the Sun. Some plasma processes in the magnetosphere are of spontaneous explosive character, while others develop rather slowly as compared to the characteristic times of plasma particle motion in it. The large-scale current s…