Cosmic-ray pitch-angle scattering in isotropic turbulence

Details Cosmic-ray pitch-angle scattering in isotropic turbulence Cosmic-ray pitch-angle scattering in isotropic turbulence

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...334..470b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 334, Nov. 1, 1988, p. 470-475.

Astronomy and Astrophysics

Astrophysics

35

Cosmic Rays, Isotropic Turbulence, Magnetohydrodynamics, Turbulence Models, Energy Spectra, Fokker-Planck Equation, Larmor Radius, Pitch (Inclination), Scattering

Scientific paper

The divergent conclusions emerging from previous investigations of cosmic-ray pitch-angle scattering in isotropic magnetic turbulence can be reconciled by incorporating a dissipation range in the turbulence model. Utilizing an isotropic turbulence model that includes dissipation, the authors calculate the Fokker-Planck coefficient for pitch-angle scattering and find that the "slab" form of Fokker-Planck coefficient favored by Jokipii is valid at very low energies, while the nonslab form obtained by Fisk and coworkers applies at intermediate energies.

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