skip to main content

Title: The modification of the nonlinear guiding center theory

We modify the NonLinear Guiding Center theory for perpendicular diffusion by replacing the spectral amplitude of the two-component model of magnetic turbulence with that of the two-dimensional model (following Shalchi), and replacing the constant a {sup 2}, which indicates the degree particles following the magnetic field line, with the variable a'{sup 2} as a function of the magnetic turbulence. We combine the modified model with the NonLinear PArallel diffusion theory to solve perpendicular and parallel diffusion coefficients simultaneously. It is shown that the new model agrees better with simulations. Furthermore, we fit the numerical results of the new model with polynomials, so that the parallel and perpendicular diffusion coefficients can be calculated directly without iteration of integrations, and many numerical calculations can be reduced.
Authors:
;  [1]
  1. State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, P.O. Box 8701 Beijing 100190 (China)
Publication Date:
OSTI Identifier:
22356881
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 787; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCELERATION; AMPLITUDES; COSMIC RADIATION; DIFFUSION; EMISSION; MAGNETIC FIELDS; MODIFICATIONS; NONLINEAR PROBLEMS; PERTURBATION THEORY; POLYNOMIALS; SIMULATION; SUN; TURBULENCE; TWO-DIMENSIONAL CALCULATIONS