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Charged particle dynamics in turbulent current sheets
Journal article   Open access   Peer reviewed

Charged particle dynamics in turbulent current sheets

A. V. Artemyev, D. L. Vainchtein, A. I. Neishtadt and L. M. Zelenyi
Physical review. E, v 93(5), pp 053207-053207
May 2016
DOI: https://doi.org/10.1103/PhysRevE.93.053207
PMID: 27300995
url
https://doi.org/10.1103/PhysRevE.93.053207View
Published, Version of Record (VoR) Open

Abstract

Physical Sciences Physics Physics, Fluids & Plasmas Physics, Mathematical Science & Technology
We study dynamics of charged particle in current sheets with magnetic fluctuations. We use the adiabatic theory to describe the nonperturbed charged particle motion and show that magnetic field fluctuations destroy the adiabatic invariant. We demonstrate that the evolution of particle adiabatic invariant's distribution is described by a diffusion equation and derive analytical estimates of the rate of adiabatic invariant's diffusion. This rate is proportional to power density of magnetic field fluctuations. We compare analytical estimates with numerical simulations. We show that adiabatic invariant diffusion results in transient particles trapping in the current sheet. For magnetic field fluctuation amplitude a few times larger than a normal magnetic field component, more than 50% of transient particles become trapped. We discuss the possible consequences of destruction of adiabaticity of the charged particle motion on the state of the current sheets.

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Collaboration types
Domestic collaboration
International collaboration
Web of Science research areas
Physics, Fluids & Plasmas
Physics, Mathematical
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