Physics
Scientific paper
Aug 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....94.9995l&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 94, Aug. 1, 1989, p. 9995-10010.
Physics
22
High Energy Electrons, Interplanetary Medium, Particle Acceleration, Relativistic Velocity, Shock Wave Propagation, Fourier Analysis, Heliosphere, Interplanetary Magnetic Fields, Ion Motion, Pioneer 11 Space Probe, Temporal Distribution
Scientific paper
Between 1978 and 1985, the Pioneer 10/11 measurements identified 11 traveling interplanetary (IP) shocks in the outer heliosphere, which accelerated ions to at least 11-20 MeV/nucleon and some electrons to 7 MeV. The measurements of the particle, plasma, and magnetic-field characteristics at shock fronts over the radial range 7 to 28 AU were used to determine the conditions which must exist at a traveling IP shock for both ion and relativistic electron acceleration to occur. Based on these conditions, a model was developed, which uses the shock-drift mechanism in conjunction with Fermi acceleration to explain the simultaneous acceleration of electrons and ions in the outer heliosphere.
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