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Study of nonlinear ion- and electron-acoustic waves in multi-component space plasmas

Lakhina, G. S.; Singh, S. V.; Verheest, F. +2 more

Large amplitude ion-acoustic and electron-acoustic waves in an unmagnetized multi-component plasma system consisting of cold background electrons and ions, a hot electron beam and a hot ion beam are studied using Sagdeev pseudo-potential technique. Three types of solitary waves, namely, slow ion-acoustic, ion-acoustic and electron-acoustic soliton…

Solar wind vs magnetosheath turbulence and Alfvén vortices

Alexandrova, O.

In this paper we give firstly a broad review of the space plasma turbulence around the ion characteristic space and temporal scales within two natural laboratories, the solar wind and the Earth magnetosheath. In both regions power law spectra of magnetic fluctuations are observed. In both regions these spectra have a break in the vicinity of the i…

New results of investigations of whistler-mode chorus emissions

Santolík, O.

This review summarizes selected recent results obtained during investigation of whistler-mode chorus emissions in the Earth's magnetosphere. Special attention is paid to results published during the last five years, with a focus on the results of the CLUSTER project. The nonlinear nature of chorus emissions is demonstrated using both theoretical r…

Dispersive MHD waves and alfvenons in charge non-neutral plasmas

Stasiewicz, K.; Ekeberg, J.

Dispersive properties of linear and nonlinear MHD waves, including shear, kinetic, electron inertial Alfvén, and slow and fast magnetosonic waves are analyzed using both analytical expansions and a novel technique of dispersion diagrams. The analysis is extended to explicitly include space charge effects in non-neutral plasmas. Nonlinear soliton s…

Mitigation of energetic electrons in the magnetosphere by amplified whistler wave under double cyclotron resonances

Kuo, S. P.

An optimal approach reducing the population of MeV electrons in the magnetosphere is presented. Under a double resonance condition, whistler wave is simultaneously in cyclotron resonance with keV and MeV electrons. The injected whistler waves is first amplified by the background keV electrons via loss-cone negative mass instability to become effec…