Theoretical and Observational Aspects of Perpendicular Diffusion of Charged Particles in the Nonlinear Guiding Center Model

Details Theoretical and Observational Aspects of Perpendicular Diffusion of Charged Particles in the Nonlinear Guiding Center Model Theoretical and Observational Aspects of Perpendicular Diffusion of Charged Particles in the Nonlinear Guiding Center Model

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsh11c1112m&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #SH11C-1112

Astronomy and Astrophysics

Astrophysics

2104 Cosmic Rays, 2114 Energetic Particles, Heliospheric (7514), 2134 Interplanetary Magnetic Fields, 2149 Mhd Waves And Turbulence, 7859 Transport Processes

Scientific paper

The recently developed theory [1] of perpendicular diffusion of charged particles in the nonlinear guiding center approximation (NLGC) has shown promise in comparison with transport computed from ensembles of test particles. Here we demonstrate that the parallel scattering mean free path is the only particle property that influences the NLGC perpendicular mean free path. This leads to a relationship between perpendicular and parallel mean free paths, obtained from numerical solutions of the NLGC integral equation, that is consistent with results of a number of observational studies in which λperp to λ∥ ˜ 1/20 to 1/10. Finally we compare the NLGC prediction with the results of analysis [2] of Jovian electron data and find that NLGC accounts better for the observations than earlier theories of perpendicular particle diffusion. [1] W Matthaeus et al, Astrophys. J. (Lett.) 590, L53 (2003) [2] D. L. Chenette et al, Astrophys. J. (Lett) 215, L95 (1977)

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