Low-energy hot plasma and particles in Saturn's magnetosphere

Details Low-energy hot plasma and particles in Saturn's magnetosphere Low-energy hot plasma and particles in Saturn's magnetosphere

Jan 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982sci...215..571k&link_type=abstract

Science, vol. 215, Jan. 29, 1982, p. 571-577.

Computer Science

46

Energetic Particles, High Temperature Plasmas, Planetary Magnetospheres, Saturn Atmosphere, Saturn Satellites, Atmospheric Composition, Carbon, Electron Distribution, Electron Energy, Electron Flux Density, Helium, Hydrogen, Ion Temperature, Oxygen, Solar Activity Effects, Plasma Torus, Protons, Magnetic Fields, Satellites, Absorption, Dipole, Models, Data, Spectrum, Lept, Lempa, Low Energy Particle Analyzer, Low Energy Magnetospheric Particle Analyzer, Charged Particles, Voyager 2, Anisotropy, Acceleration

Scientific paper

Results of the low-energy charged particle experiment carried by Voyager 2 in the Saturn magnetosphere are presented. Measurements of ions of energy greater than 28 keV and electrons of energies greater than 22 keV revealed the presence of a region containing an extremely hot (30-50 keV) plasma extending from the orbit of Tethys past the orbit of Rhea, and a low-energy ion mantle inside the dayside and nightside magnetospheres. H, H2, H3, He, C and O at energies greater than 200 keV/n were found to be important constituents of the Saturn magnetosphere, at relative abundances suggestive of a solar wind origin. Low-energy electron flux enhancements were observed between the L shells of Rhea and Tethys which were absent during the Voyager 1 encounter, and persistent asymmetric electron pitch-angle distributions were noted in the outer magnetosphere in conjunction with the hot ion plasma torus. Signatures of the passage of Tethys and Enceladus through the magnetosphere were found, although not at the positions predicted by dipole magnetic field models.

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