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Particle Scattering by Magnetic Fields

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Abstract

The need for a correct quantitative treatment of the interactions between cosmic rays and turbulent magnetic fields continues to be one of the fundamental problems of modern astrophysics. It is the aim of this paper to review new developments in the understanding of mechanisms involved in the scattering of charged particles by magnetic field fluctuations. Special emphasis is given to a comparison of transport parameters determined from the modeling of spacecraft and neutron monitor observation of solar particle events, with theoretical predictions derived from a spectral analysis of simultaneously measured fluctuation spectra. It appears that the traditional quasi-linear theory of particle scattering requires only a slight modification, and the major problem still is our lack of knowledge of the three-dimensional structure of the magnetic turbulence. Possibilities to better reconcile the theory with observations by properly taking into account the microphysics of wave and turbulence aspects of the fluctuations, and to use energetic particles as probes to study certain properties of the magnetic turbulence, are discussed.

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Authors and Affiliations

  1. Institut für Experimentelle und Angewandte Physik, Universität Kiel, D-24118, Kiel, Germany

    Wolfgang Dröge

  2. Bartol Research Institute, University of Delaware, Newark, DE, 19716, U.S.A.

    Wolfgang Dröge

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  1. Wolfgang Dröge
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Dröge, W. Particle Scattering by Magnetic Fields. Space Science Reviews 93, 121–151 (2000). https://doi.org/10.1023/A:1026588210726

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