Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...195..787g&link_type=abstract
Astrophysical Journal, vol. 195, Feb. 1, 1975, pt. 1, p. 787-799.
Astronomy and Astrophysics
Astrophysics
26
Cosmic Rays, Homogeneous Turbulence, Interplanetary Magnetic Fields, Pitch (Inclination), Radiation Distribution, Scattering Coefficients, Astronomical Models, Charged Particles, Delta Function, Diffusion Theory, Fokker-Planck Equation, Magnetic Effects, Particle Motion, Propagation Modes, Turbulent Diffusion
Scientific paper
The Fokker-Planck coefficient for pitch-angle scattering, appropriate for cosmic rays in homogeneous stationary magnetic turbulence is computed without making any specific assumptions concerning the statistical symmetries of the random field. The Fokker-Planck coefficient obtained can be used to compute the parallel diffusion coefficient for high-energy cosmic rays propagating in the presence of strong turbulence, or for low-energy cosmic rays in the presence of weak turbulence. Because of the generality of magnetic turbulence allowed for in the analysis, special interplanetary magnetic field features, such as discontinuities or particular wave modes, can be included rigorously.
Goldstein Michel L.
Klimas Alex J.
Sandri Guido
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