Scattering of energetic particles by anisotropic magnetohydrodynamic turbulence with a goldreich-sridhar power spectrum

Academic Article

Abstract

  • Scattering rates for a Goldreich-Sridhar (GS) spectrum of anisotropic, incompressible, magnetohydrodynamic turbulence are calculated in the quasilinear approximation. Because the small-scale fluctuations are constrained to have wave vectors nearly perpendicular to the background magnetic field, scattering is too weak to provide either the mean-free paths commonly used in Galactic cosmic-ray propagation models or the mean-free paths required for acceleration of cosmic rays at quasiparallel shocks. Where strong pitch-angle scattering occurs, it is due to fluctuations not described by the GS spectrum, such as fluctuations generated by streaming cosmic rays.
  • Status

    Publication Date

  • November 27, 2000
  • Has Subject Area

    Published In

    Digital Object Identifier (doi)

    Pubmed Id

  • 11082620
  • Start Page

  • 4656
  • End Page

  • 4659
  • Volume

  • 85
  • Issue

  • 22