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      Effects of non-isotropic scattering, magnetic helicity, and adiabatic focusing on diffusive transport of solar energetic particles

      Litvinenko, Yuri E.
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      EFFECTS OF NON-ISOTROPIC SCATTERING, MAGNETIC HELICITY, AND ADIABATIC FOCUSING ON.pdf
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      DOI
       10.1088/0004-637X/752/1/16
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      Litvinenko, Y. E. (2012). Effects of non-isotropic scattering, magnetic helicity, and adiabatic focusing on diffusive transport of solar energetic particles. The Astrophysical Journal, 752(1), 16.
      Permanent Research Commons link: https://hdl.handle.net/10289/7206
      Abstract
      Transport of solar energetic particles in interplanetary space is analyzed. A new systematic derivation of the diffusion approximation is given, which incorporates the effects of non-isotropic scattering, magnetic helicity, and adiabatic focusing in a non-uniform large-scale magnetic field. The derivation is based on a system of stochastic differential equations, equivalent to the Fokker-Planck equation, and the new method is a generalization of the Smoluchowski approximation in the theory of the Brownian motion. Simple, physically transparent expressions for the transport coefficients are derived. Different results of earlier treatments of the problem are related to the assumptions regarding the evolving particle distribution
      Date
      2012
      Type
      Journal Article
      Publisher
      The American Astronomical Society
      Collections
      • Computing and Mathematical Sciences Papers [1454]
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