Electron/ion whistler instabilities and magnetic noise bursts

Details Electron/ion whistler instabilities and magnetic noise bursts Electron/ion whistler instabilities and magnetic noise bursts

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....9211209a&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 92, Oct. 1, 1987, p. 11209-11214. DOE-supported research.

Physics

21

Electromagnetic Noise, Electron Plasma, Geomagnetism, Magnetohydrodynamic Stability, Plasma Composition, Whistlers, Electromagnetic Properties, Field Aligned Currents, Ion Beams, Vlasov Equations

Scientific paper

Two whistler instabilities are investigated by means of the linear Vlasov dispersion equation. They are called the electron/ion parallel and oblique whistler instabilities, and are driven by electron/ion relative drifts along the magnetic field. It is demonstrated that the enhanced fluctuations from these instabilities can explain several properties of magnetic noise bursts in and near the plasma sheet in the presence of ion beams and/or field-aligned currents. At sufficiently high plasma beta, these instabilities may affect the current system in the magnetotail.

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