Physics
Scientific paper
Aug 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975icrc....5.1716r&link_type=abstract
In: International Cosmic Ray Conference, 14th, Munich, West Germany, August 15-29, 1975, Conference Papers. Volume 5. (A76-26851
Physics
5
Particle Motion, Radiative Transfer, Solar Cosmic Rays, Solar Flux, Transport Properties, Convective Flow, Diurnal Variations, Galactic Radiation, Interplanetary Magnetic Fields, Liouville Equations, Radioactive Decay, Scatter Propagation, Solar Flares
Scientific paper
Observations of solar cosmic rays between 0.1 MeV and 1 GeV are more consistent with scatter-free than diffusive propagation near 1 AU. Since these particles also are constrained to interplanetary magnetic field lines, the parallel and transverse flow are decoupled by collimated convection. Local propagation is therefore more appropriately described by Liouville's equation, and transport properties can be examined from the exact zeroeth and first moments of the equation averaged over all directions in momentum space. Observational results which may be explained directly without invoking local scattering include the decay of solar flare events as well as the radial gradient, diurnal and semidiurnal variation of galactic cosmic rays.
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