A model of galactic cosmic rays for use in calculating linear energy transfer spectra

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Environment Models, Galactic Cosmic Rays, Interplanetary Medium, Linear Energy Transfer (Let), Spectral Energy Distribution, Crres (Satellite), Interstellar Space, Light Elements, Single Event Upsets

Scientific paper

The Galactic Cosmic Rays (GCR) contain fully stripped nuclei, from Hydrogen to beyond the Iron group, accelerated to high energies and are a major component of the background radiation encountered by satellites and interplanetary spacecraft. This paper presents a GCR model which is based upon our current understanding of the astrophysics of GCR transport through interstellar and interplanetary space. The model can be used to predict the energy spectra for all stable and long-lived radioactive species from H to Ni over an energy range from 50 to 50,000 MeV/nucleon as a function of a single parameter, the solar modulation level phi. The details of this model are summarized, phi is derived for the period 1974 to present, and results from this model during the 1990/1991 Combined Release and Radiation Effects Satellite (CRRES) mission are presented.

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