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Upper cutoff of high energy solar protons

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Abstract

By studying the 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 R m . This holds over a wide range in energy or rigidity. For the events examined R m had values between 3 GV and 20 GV. It is shown that there is no correlation between R m and the amplitude of the events.

The equation describing continuous particle acceleration in a confining medium is solved in the non-stationary 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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Authors and Affiliations

  1. Observatoire de Meudon, 92190, Meudon, France

    Dj. Heristchi, G. Trottet & J. Perez-Peraza

Authors
  1. Dj. Heristchi
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  2. G. Trottet
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  3. J. Perez-Peraza
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Instituto de Astronomia, Universidad Nacional Autonoma de Mexico, Mexico City, Mexico.

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Heristchi, D., Trottet, G. & Perez-Peraza, J. Upper cutoff of high energy solar protons. Sol Phys 49, 151–175 (1976). https://doi.org/10.1007/BF00221491

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  • DOI: https://doi.org/10.1007/BF00221491

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