A source of plasma turbulence at the ionopause of Venus

Details A source of plasma turbulence at the ionopause of Venus A source of plasma turbulence at the ionopause of Venus

Nov 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....8610094d&link_type=abstract

Journal of Geophysical Research, vol. 86, Nov. 1, 1981, p. 10094-10104.

Physics

2

Ionospheric Disturbances, Plasma Diagnostics, Plasma Turbulence, Plasmapause, Venus Atmosphere, Electric Fields, Mass Spectroscopy, Pioneer Venus Spacecraft, Planetary Ionospheres, Plasma Waves, Wave Propagation, Venus, Ionopause, Turbulence, Plasmas, Source, Frequencies, Altitude, Suprathermal Ions, Electric Fields, Pioneer Venus, Hypotheses, Streaming, Flow, Ionosheath, Electrostatic Properties, Electromagnetic Properties, Doppler Effects, Thermal Effects, Whistlers, Diagrams, Parameters, Waves, Mathemati

Scientific paper

The microscopic aspects of the interaction of the solar wind with the ionosphere of Venus are explored, in light of simultaneous suprathermal ion and low frequency electric field signal measurements by Pioneer Venus instruments which suggest that the two ionopause phenomena may be causally related. Both parallel and perpendicular propagating waves are examined for instability, in the presence of planetary ions added to the flowing ionosheath plasma, by linear Vlasov theory. While for the low beta plasma conditions of the ionopause neither electrostatic nor electromagnetic parallel propagating waves are found to be unstable, perpendicular propagating electrostatic waves are unstable and have the proper frequency-wavelength relation to be Doppler shifted into the observed 100-Hz channel.

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