Shock wave effects in solar cosmic ray events |
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| Authors: | I D Palmer |
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| Institution: | (1) Division of Radiophysics, CSIRO, Sydney, Australia |
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| Abstract: | Two low-energy ( 1 MeV) solar proton events which display a gradual intensity increase to a maximum near the time of an SSC, followed by an abrupt, large decrease, are interpreted in terms of a population of cosmic rays which are  swept ahead of an interplanetary shock wave. A model which describes the variation with time of intensity and anisotropy at the Earth is developed using a Monte Carlo technique which traces the histories of particles released impulsively at the Sun. A good fit to each of the profiles observed at 0.6 to 0.9 MeV proton energies is obtained with a diffusion coefficient   2 × 1020 cm2 s–) = 13.46 - 2.99 sin21 and a near perfect shock reflector.Now at University of California, LASL, Los Alamos, New Mexico. |
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