Charged particle diffusion in isotropic random magnetic fields

Abstract

The investigation of the diffusive transport of charged particles in a turbulent magnetic field remains a subject of considerable interest. Research has most frequently concentrated on determining the diffusion coefficient in the presence of a mean magnetic field. Here we consider diffusion of charged particles in fully three-dimensional isotropic turbulent magnetic fields with no mean field, which may be pertinent to many astrophysical situations. We identify different ranges of particle energy depending upon the ratio of the Larmor radius of the charged particle to the characteristic outer length scale of the turbulence. Two different theoretical models are proposed to calculate the diffusion coefficient, each applicable to a distinct range of particle energies. The theoretical results are compared with those from computer simulations, showing good agreement.

References in corpus (5)

• Simulations of Ion Acceleration at Non-relativistic Shocks. III. Particle Diffusion
• The transport of cosmic rays in self-excited magnetic turbulence
• Numerical propagation of high energy cosmic rays in the Galaxy I: technical issues
• The boron-to-carbon abundance ratio and Galactic propagation of cosmic radiation
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Cited by in corpus (2)

• Relative distribution of cosmic rays and magnetic fields
• Atmospheric neutrinos and the knee of the Cosmic Ray spectrum