Signatures of the Martian moon PHOBOS in the fluxes of energetic particles as measured by experiment SLED onboard PHOBOS 2

Details Signatures of the Martian moon PHOBOS in the fluxes of energetic particles as measured by experiment SLED onboard PHOBOS 2 Signatures of the Martian moon PHOBOS in the fluxes of energetic particles as measured by experiment SLED onboard PHOBOS 2

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993p%26ss...41..435k&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 41, no. 6, p. 435-440

Physics

Plasma Physics

Energetic Particles, Mars (Planet), Particle Acceleration, Phobos, Planetary Magnetic Fields, Planetary Magnetospheres, Plasma Physics, Flux (Rate), Ion Density (Concentration), Magnetopause, Magnetosheath, Proton Energy, Shock Fronts, Soviet Spacecraft

Scientific paper

Energetic particles Ep greater than 34 keV, E0+ greater than 55 keV), plasma ions (30 eV-6 keV) and magnetic fields have been observed onboard Phobos 2 during the approach phases of the spacecraft to the Phobos moon in February/March 1989. Water ions and protons escaping as neutral water molecules from Phobos and the Martian tail can generally be accelerated by the pickup process. The present study is concerned with the acceleration of particles at the evening side (alpha s/c = 90 deg) of the Martian bowshock, which escaped as neutrals, especially from the tail or at the front side of Phobos. Since the interplanetary magnetic field forms quasiperpendicular and quasiparallel shocks with the Martian bowshock, the shock drift and the Fermi acceleration process were considered as processes for a further acceleration. The observed particle fluxes are interpreted as protons of 34-200 keV and O(+) ions of 55-225 keV energy.

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