Solar particle propagation in the interplanetary environment - A study of the November 18, 1968, event

Details Solar particle propagation in the interplanetary environment - A study of the November 18, 1968, event Solar particle propagation in the interplanetary environment - A study of the November 18, 1968, event

Dec 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jgr....81.5807w&link_type=abstract

Journal of Geophysical Research, vol. 81, Dec. 1, 1976, p. 5807-5821. NATO-supported research.

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2

Interplanetary Magnetic Fields, Interplanetary Space, Particle Diffusion, Particle Energy, Solar Corpuscular Radiation, Solar Flares, Abundance, Angular Distribution, Chemical Composition, Energy Spectra, Mean Free Path, Particle Flux Density

Scientific paper

A detailed analysis is made of solar-particle propagation during a long-lasting and complicated solar flare event. A thorough analysis is made of the propagation, taking into account (1) the effect of large-scale interplanetary magnetic field (IMF) disturbances on particle populations, (2) the role of long-lasting solar injection processes, (3) small-angle scatterings in the IMF within 1 AU, (4) the influence of a distant (beyond 1 AU) scattering barrier, and (5) the particle abundance ratios. It is concluded that the solar cosmic rays were the result of a long-lasting solar injection process, the length of the injection increasing for lower-energy particles. The pitch-angle propagation characteristics of these particles can be explained by particle propagation in a medium with a long mean free path (about 0.3 AU). It is suggested that the techniques of this analysis and the basic conclusions are applicable to many other nondiffusive-appearing solar-particle events.

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