Resonant instability near the two-ion crossover frequency in the Io plasma torus

Details Resonant instability near the two-ion crossover frequency in the Io plasma torus Resonant instability near the two-ion crossover frequency in the Io plasma torus

Jul 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.6311t&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 90, July 1, 1985, p. 6311-6318.

Physics

15

Io, Jupiter Atmosphere, Magnetohydrodynamic Stability, Plasma Resonance, Plasma-Electromagnetic Interaction, Space Plasmas, Computerized Simulation, Ion Cyclotron Radiation, Low Frequencies, Plasma Composition, Toroidal Plasmas, Wave Propagation, Whistlers, Jupiter, Satellites, Io, Plasma, Torus, Resonance, Ions, Frequencies, Propogation, Electromagnetic Properties, Waves, Protons, Characteristics, Composition, Polarization, Scattering, Particles, Power, Simulations, Whistlers, Quenching, Damping, Latitude,

Scientific paper

Thorne and Scarf (1984) have presented evidence for the existence of intense low-frequency fluctuating electric fields in the Io plasma torus. Two distinct mechanisms have been proposed for this phenomenon, namely, ion cyclotron instability which occurs at intermediate latitude, and whistler instability near the equator. The present investigation is concerned with a quantitative appraisal of each of these mechanisms, taking into account an evaluation of the net convective growth rate of waves along ray paths which traverse the Io torus. Aspects of wave propagation near the crossover frequency are considered along with questions regarding the resonant interaction with energetic particles.

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