Nonlinear guiding center theory of perpendicular diffusion: General properties and comparison with observation

Details Nonlinear guiding center theory of perpendicular diffusion: General properties and comparison with observation Nonlinear guiding center theory of perpendicular diffusion: General properties and comparison with observation

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3110805b&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 10, CiteID L10805

Physics

Plasma Physics

34

Interplanetary Physics: Energetic Particles, Heliospheric (7514), Planetary, Interplanetary Physics: Cosmic Rays, Space Plasma Physics: Charged Particle Motion And Acceleration

Scientific paper

A nonlinear guiding center (NLGC) theory for diffusion of charged particles perpendicular to the mean magnetic field was recently proposed. Here, we draw attention to a number of attractive features of this theory: (1) The theory provides a natural mechanism to connect the perpendicular mean free path with the parallel mean free path. In fact, the parallel mean free path is the only particle property required to determine uniquely the perpendicular mean free path. (2) Under a broad range of conditions, the theory predicts that the perpendicular mean free path will be of order one percent or a few percent of the parallel mean free path, in agreement with numerical simulations of particle transport. (3) For conditions representative of the inner heliosphere, the theory predicts values of the perpendicular mean free path in agreement with observational determinations from Jovian electrons and from modeling Ulysses observations of Galactic protons.

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