Characteristic signatures of energetic ions upstream from the Kronian magnetosphere as revealed by Cassini/MIMI

Details Characteristic signatures of energetic ions upstream from the Kronian magnetosphere as revealed by Cassini/MIMI Characteristic signatures of energetic ions upstream from the Kronian magnetosphere as revealed by Cassini/MIMI

Mar 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009iaus..257..517m&link_type=abstract

Universal Heliophysical Processes, Proceedings of the International Astronomical Union, IAU Symposium, Volume 257, p. 517-522

Astronomy and Astrophysics

Astronomy

Planets And Satellites: General, Acceleration Of Particles, Plasmas

Scientific paper

We present unique observations obtained by the Magnetospheric Imaging Instrument (MIMI) on the Cassini spacecraft, of the energetic ion population in the environment upstream from the dawn-to-noon sector of the Kronian magnetosphere during the approach phase and subsequent several orbits of the Cassini spacecraft around the planet. High sensitivity observations of energetic ion directional intensities, energy spectra, and ion composition were obtained by the Ion and Neutral Camera (INCA) of the MIMI instrument complement with a geometry factor of ~2.5 cm2 sr. Charge state information was provided by the Charge-Energy-Mass-Spectrometer (CHEMS) over the range ~3 to 220 keV per charge. The observations revealed the presence of distinct upstream bursts of energetic hydrogen and oxygen ions up to distances of ~135 RS. The observations are presented and their theoretical implications are addressed.

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