Energetic particle studies at Mars by SLED on PHOBOS 2

Details Energetic particle studies at Mars by SLED on PHOBOS 2 Energetic particle studies at Mars by SLED on PHOBOS 2

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992adspr..12..231m&link_type=abstract

(Recent results on Mars and Venus; Proceedings of Symposium 3 and the Topical Meetings of the Interdisciplinary Scientific Commi

Physics

11

Energetic Particles, Magnetopause, Mars (Planet), Particle Acceleration, Planetary Magnetospheres, Energy Spectra, Magnetic Effects, Mars Environment, Oxygen Ions, Space Plasmas, Trapped Magnetic Fields

Scientific paper

Data recorded by the SLED instruments on Phobos 2 while it was in the first four elliptical orbits and during 114 circular orbits about Mars (February-March, 1989) are presented. Data obtained while in close elliptical orbits around the planet display evidence of energy-related particle shadowing by the body of Mars; this effect was also sometimes observed in circular orbits at an altitude of 6330 km above the planet. Possible explanations of this phenomenon include the presence of quasi-trapped radiation of Mars and the detected propagation of accelerated particles along the boundary of the magnetopause from the dayside to the nightside of the planet. In circular orbits, many significant flux enhancement events, in the range 30-200 keV, were detected adjacent to the bow shock, indicating that the spacecraft traversed strongly anisotropic jets of energetic particles, which are suggested to contain O(+) ions.

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