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Title: Heliospheric current sheet and effects of its interaction with solar cosmic rays

Abstract

The effects of interaction of solar cosmic rays (SCRs) with the heliospheric current sheet (HCS) in the solar wind are analyzed. A self-consistent kinetic model of the HCS is developed in which ions with quasiadiabatic dynamics can present. The HCS is considered an equilibrium embedded current structure in which two main plasma species with different temperatures (the low-energy background plasma of the solar wind and the higher energy SCR component) contribute to the current. The obtained results are verified by comparing with the results of numerical simulations based on solving equations of motion by the particle tracing method in the given HCS magnetic field with allowance for SCR particles. It is shown that the HCS is a relatively thin multiscale current configuration embedded in a thicker plasma layer. In this case, as a rule, the shear (tangential to the sheet current) component of the magnetic field is present in the HCS. Taking into account high-energy SCR particles in the HCS can lead to a change of its configuration and the formation of a multiscale embedded structure. Parametric family of solutions is considered in which the current balance in the HCS is provided at different SCR temperatures and different densities ofmore » the high-energy plasma. The SCR densities are determined at which an appreciable (detectable by satellites) HCS thickening can occur. Possible applications of this modeling to explain experimental observations are discussed.« less

Authors:
 [1]; ; ; ;  [2]
  1. Moscow State University, Skobeltsyn Institute of Nuclear Physics (Russian Federation)
  2. Russian Academy of Sciences, Space Research Institute (Russian Federation)
Publication Date:
OSTI Identifier:
22614096
Resource Type:
Journal Article
Resource Relation:
Journal Name: Plasma Physics Reports; Journal Volume: 42; Journal Issue: 8; Other Information: Copyright (c) 2016 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; COMPUTERIZED SIMULATION; COSMIC RADIATION; CURRENTS; EQUATIONS OF MOTION; HELIOSPHERE; INTERACTIONS; KINETICS; MAGNETIC FIELDS; MATHEMATICAL SOLUTIONS; PLASMA DENSITY; SHEAR; SOLAR WIND

Citation Formats

Malova, H. V., E-mail: hmalova@yandex.ru, Popov, V. Yu., Grigorenko, E. E., Dunko, A. V., and Petrukovich, A. A. Heliospheric current sheet and effects of its interaction with solar cosmic rays. United States: N. p., 2016. Web. doi:10.1134/S1063780X16080079.
Malova, H. V., E-mail: hmalova@yandex.ru, Popov, V. Yu., Grigorenko, E. E., Dunko, A. V., & Petrukovich, A. A. Heliospheric current sheet and effects of its interaction with solar cosmic rays. United States. doi:10.1134/S1063780X16080079.
Malova, H. V., E-mail: hmalova@yandex.ru, Popov, V. Yu., Grigorenko, E. E., Dunko, A. V., and Petrukovich, A. A. Mon . "Heliospheric current sheet and effects of its interaction with solar cosmic rays". United States. doi:10.1134/S1063780X16080079.
@article{osti_22614096,
title = {Heliospheric current sheet and effects of its interaction with solar cosmic rays},
author = {Malova, H. V., E-mail: hmalova@yandex.ru and Popov, V. Yu. and Grigorenko, E. E. and Dunko, A. V. and Petrukovich, A. A.},
abstractNote = {The effects of interaction of solar cosmic rays (SCRs) with the heliospheric current sheet (HCS) in the solar wind are analyzed. A self-consistent kinetic model of the HCS is developed in which ions with quasiadiabatic dynamics can present. The HCS is considered an equilibrium embedded current structure in which two main plasma species with different temperatures (the low-energy background plasma of the solar wind and the higher energy SCR component) contribute to the current. The obtained results are verified by comparing with the results of numerical simulations based on solving equations of motion by the particle tracing method in the given HCS magnetic field with allowance for SCR particles. It is shown that the HCS is a relatively thin multiscale current configuration embedded in a thicker plasma layer. In this case, as a rule, the shear (tangential to the sheet current) component of the magnetic field is present in the HCS. Taking into account high-energy SCR particles in the HCS can lead to a change of its configuration and the formation of a multiscale embedded structure. Parametric family of solutions is considered in which the current balance in the HCS is provided at different SCR temperatures and different densities of the high-energy plasma. The SCR densities are determined at which an appreciable (detectable by satellites) HCS thickening can occur. Possible applications of this modeling to explain experimental observations are discussed.},
doi = {10.1134/S1063780X16080079},
journal = {Plasma Physics Reports},
number = 8,
volume = 42,
place = {United States},
year = {Mon Aug 15 00:00:00 EDT 2016},
month = {Mon Aug 15 00:00:00 EDT 2016}
}