Whistler mode turbulence generated by electron beams in earth's bow shock

Details Whistler mode turbulence generated by electron beams in earth's bow shock Whistler mode turbulence generated by electron beams in earth's bow shock

Jan 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jgr....89..105t&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 89, Jan. 1, 1984, p. 105-114.

Physics

35

Atmospheric Turbulence, Bow Waves, Electron Beams, Propagation Modes, Shock Wave Propagation, Whistlers, Electron Distribution, Magnetohydrodynamic Stability, Magnetosheath, Plasma Turbulence, Plasma Waves

Scientific paper

The Landau and cyclotron growth rates of whistler mode waves in the earth's bow shock are calculated by using electron distribution functions obtained with the fast plasma experiment on ISEE 2. Three electron distribution functions measured within the transition region of the shock are analyzed. These functions spontaneously generate whistler mode waves with plasma rest frame frequencies between about 0.1 and 100 Hz. The wave normal angles of the generated whistlers range from 0 deg to the resonance cone angle. Electromagnetic Landau resonance and/or cyclotron resonance contribute to wave growth over the range of observed velocity distributions. Waves generated by the normal cyclotron resonance have wave vectors directed toward the solar wind, while those generated by the Landau and the anomalous cyclotron resonances have vectors directed toward the magnetosheath. The preditions of the study are in qualitative agreement with observations of whistler mode waves near the earth's bow shock.

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