Modeling of Magnetic Dipolarizations and Turbulence in Earth’s Magnetotail as Factors of Plasma Acceleration and Transfer

You are here: Homepage > Search

Modeling of Magnetic Dipolarizations and Turbulence in Earth’s Magnetotail as Factors of Plasma Acceleration and Transfer

Parkhomenko, E. I. / Malova, H. V. / Popov, V. Yu. / Grigorenko, E. E. / Petrukovich, A. A. / Zelenyi, L. M. / Kronberg, E. A.

Abstract

Abstract— The paper is devoted to studying processes of plasma particle acceleration in the process of magnetic dipolarizations in a current sheet of Earth’s magnetotail. A numerical model is constructed that allows evaluation of particle acceleration in three possible scenarios: (A) Proper dipolarization; (B) Passage of multiple dipolarization fronts; (C) Passage of fronts followed by high-frequency electromagnetic oscillations. The energy spectra of three types of accelerated particles are obtained: hydrogen $ H^{+} $ and oxygen $ O^{+} $ ions and electrons $ e^{–} $. It is shown that, at different time scales, predominant acceleration of various particle populations occurs in scenarios (A)–(C). Oxygen ions are accelerated most efficiently in single dipolarization process (A), protons (and, to some extent, electrons), in scenario (B), whereas scenario (C) is most efficient for acceleration of electrons. It is shown that accounting for high-frequency electromagnetic fluctuations, accompanying magnetic dipolarization, may explain the appearance of streams of particles with energies on the order of hundreds of keV in Earth’s magnetotail.

Access

Access via TIB

Check availability in my library

Order at Subito €

Export, share and cite

Document information

Title :

Modeling of Magnetic Dipolarizations and Turbulence in Earth’s Magnetotail as Factors of Plasma Acceleration and Transfer

Contributors:

Parkhomenko, E. I. (author) / Malova, H. V. (author) / Popov, V. Yu. (author) / Grigorenko, E. E. (author) / Petrukovich, A. A. (author) / Zelenyi, L. M. (author) / Kronberg, E. A. (author)

Published in:

Cosmic Research ; 56 , 6

Publication date :

2018

ISSN :

0010-9525

DOI :

https://doi.org/10.1134/S0010952518060084

Type of media :

Article (Journal)

Type of material :

Language :