Upper cutoff of high energy solar protons

Details Upper cutoff of high energy solar protons Upper cutoff of high energy solar protons

Jul 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976soph...49..151h&link_type=abstract

Solar Physics, vol. 49, July 1976, p. 151-175.

Physics

14

Energy Spectra, Particle Acceleration, Proton Energy, Solar Protons, Monitors, Neutron Counters, Ocean Surface, Relativistic Particles, Rigidity

Scientific paper

By studying data from the worldwide neutron monitor network, the spectra of most of the solar proton events in cycles 19-20 have been determined. These spectra are best represented by a power law with an upper cutoff (Rm). This holds over a wide range in energy or rigidity. For the events examined, Rm had values between 3 GV and 20 GV. It is shown that there is no correlation between Rm and the amplitude of the events. The equation describing continuous particle acceleration in a confining medium is solved in the unsteady-state case. This solution shows the existence of a cutoff in the spectrum and is compared with the experimental results in connection with the problem of particle-acceleration time.

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