Ponderomotive modification of multicomponent magnetospheric plasma due to electromagnetic ion cyclotron waves

DOI10.1007/S10509-013-1443-0zbMATH Open1276.86006arXiv1304.4834OpenAlexW3101372428MaRDI QIDQ383541

Publication date: 5 December 2013

Published in: Astrophysics and Space Science (Search for Journal in Brave)

Abstract: We derive the expression for the ponderomotive force in the real multicomponent magnetospheric plasma containing heavy ions. The ponderomotive force considered includes the induced magnetic moment of all the species and arises due to inhomogeneity of the traveling low-frequency electromagnetic wave amplitude in the nonuniform medium. The nonlinear stationary force balance equation is obtained taking into account the gravitational and centrifugal forces for the plasma consisting of the electrons, protons and heavy ions (He

+

). The background geomagnetic field is taken for the dayside of the magnetosphere, where the magnetic field have magnetic "holes" (Antonova and Shabansky 1968). The balance equation is solved numerically to obtain the nonlinear density distribution of ions (H

+

) in the presence of heavy ions (He

+

). It is shown that for frequencies less than the helium gyrofrequency at the equator the nonlinear plasma density perturbations are peaked in the vicinity of the equator due to the action of the ponderomotive force. A comparison of the cases of the dipole and dayside magnetosphere is provided. It is obtained that the presence of heavy ions leads to decrease of the proton density modification.

Full work available at URL: https://arxiv.org/abs/1304.4834

zbMATH Keywords

waves magnetic fields Earth plasmas ponderomotive force

Mathematics Subject Classification ID

Statistical mechanics of plasmas (82D10) Geo-electricity and geomagnetism (86A25)

Cites Work

Ponderomotive Action of ULF Pulsations in the Magnetospheric Plasma