Comparison of the energy spectra and pitch angle distributions for solar particle events

Details Comparison of the energy spectra and pitch angle distributions for solar particle events Comparison of the energy spectra and pitch angle distributions for solar particle events

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983icrc....4..144d&link_type=abstract

IN: International Cosmic Ray Conference, 18th, Bangalore, India, August 22-September 3, 1983, Conference Papers. Volume 4 (A85-2

Physics

Angular Distribution, Energy Spectra, Proton Flux Density, Solar Flares, Solar Protons, Pitch (Inclination), Solar Activity Effects, Solar Terrestrial Interactions, Time Dependence

Scientific paper

The solar particle events of May 4, 1960, November 15, 1960, November 22, 1977, and May 7, 1978 are analyzed to determine the energy spectra and pitch angle distributions of the solar protons near earth as a function of time. The analysis of the first two events is based on neutron monitor (NM) data only and covers the energy range from 500 MeV to 10 GeV. For the latter two events, both NM and satellite data are available, making it possible to extend the continuous energy range to about 50 MeV. It is found that the difference in the observed NM rate increases and energy spectra are not directly correlated and can only be understood by considering the anisotropy-time profiles and pitch angle distributions. It is also noted that since the two May events are nearly scatter-free, the NM rate profiles and energy spectra of the solar particles near earth can be used to study the injection conditions at the sun.

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