On the cosmic ray cross-field diffusion for solar wind turbulence

Details On the cosmic ray cross-field diffusion for solar wind turbulence On the cosmic ray cross-field diffusion for solar wind turbulence

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001a%26a...376..667m&link_type=abstract

Astronomy and Astrophysics, v.376, p.667-671 (2001)

Astronomy and Astrophysics

Astrophysics

13

Cosmic Rays, Magnetohydrodynamics (Mhd), Turbulence, Solar Wind

Scientific paper

The cross-field diffusion coefficient of charged particles in the presence of pure isotropic Alfvén waves, pure isotropic magnetosonic waves and their mixture is considered using Monte Carlo particle simulations. We show that the cross-field diffusion coefficient kappa perpendicular to strongly depends on the assumed spectrum and amplitude of MHD turbulence but much less on the type of waves considered. It is demonstrated that transport perpendicular to the average magnetic field is mostly determined by compound diffusion which combines the effects of scattering off magnetic irregularities with magnetic braiding. The ratio kappa perpendicular to/ kappaparallel DM~ const. is independent of rigidity over the wide range considered.

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