Ion cyclotron waves in the Io torus during the Galileo encounter: Warm plasma dispersion analysis

Details Ion cyclotron waves in the Io torus during the Galileo encounter: Warm plasma dispersion analysis Ion cyclotron waves in the Io torus during the Galileo encounter: Warm plasma dispersion analysis

Sep 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997georl..24.2143h&link_type=abstract

Geophysical Research Letters, vol. 24, p. 2143

Physics

47

Cyclotron Radiation, Galileo Spacecraft, Ion Cyclotron Radiation, Plasma Diffusion, Toroidal Plasmas, Extraterrestrial Environments, Plasma Interactions, Electromagnetic Radiation, Wave Dispersion, Free Energy, Space Probes

Scientific paper

During the Galileo-Io flyby, nearly field-aligned, left-hand circularly polarized ion cyclotron waves were observed in a band near the sulfur-dioxide ion gyrofrequency. We have performed a warm plasma dispersion analysis using nominal Io torus composition ratios, pickup ion 'ring'-type velocity-space distributions, and a thermal background plasma of typical toms temperature. Analysis shows that the SO2(+) wave is dominant, particularly as the ring begins to broaden. The observed spectral peak indicates that the ring distribution of pickup SO2(+) is highly unstable and generates waves, but there is unlikely to be sufficient time for ions to fully the thermalize before dissociation occurs. Assuming wave-particle scattering of ions towards a 'bispherical' shell-type distribution, a free energy analysis and comparison with observed wave amplitudes suggests that the ions are not scattered far from the ring and/or that the SO2(+) composition ratio in the Io torus falls off considerably from Io wake values.

Affiliated with

Also associated with

No associations

Rating

Ion cyclotron waves in the Io torus during the Galileo encounter: Warm plasma dispersion analysis does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Ion cyclotron waves in the Io torus during the Galileo encounter: Warm plasma dispersion analysis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ion cyclotron waves in the Io torus during the Galileo encounter: Warm plasma dispersion analysis will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1226032