Computer Science
Scientific paper
Mar 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990p%26ss...38..343e&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 38, March 1990, p. 343-353. SERC-supported research.
Computer Science
6
Interplanetary Magnetic Fields, Particle Acceleration, Protons, Satellite-Borne Instruments, Shock Wave Propagation, Angular Distribution, Computerized Simulation, International Sun Earth Explorers
Scientific paper
Observations are presented of pitch-angle distributions as a function of energy, and omnidirectional energy spectra of particles, measured in 1978-1979 for six interplanetary shock events with the low-energy directional proton spectrometer aboard the ISEE-3 spacecraft. Using time reversed numerical simulation of the scatter-free acceleration of charged particles through shocks, it was found that, for simple planar geometries of the magnetic field and for a power-law spectrum of preaccelerated particles, the predicted omnidirectional enhacements were smaller than the ones observed. It is suggested that fluctuations in the magnetic field might seriously affect the acceleration process.
Balogh André
Erdos Géza
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