Plasma transport in the interplanetary space: percolation and anomalous diffusion of magnetic-field lines.

Details Plasma transport in the interplanetary space: percolation and anomalous diffusion of magnetic-field lines. Plasma transport in the interplanetary space: percolation and anomalous diffusion of magnetic-field lines.

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997ncimc..20..897z&link_type=abstract

Nuovo Cimento C, Vol. 20C, N. 6, p. 897 - 902

Physics

Interplanetary Magnetic Field: Magnetohydrodynamics

Scientific paper

The magnetic fluctuations due to, e.g., magnetohydrodynamic turbulence cause a magnetic-field line random walk that influences many cosmic plasma phenomena. The results of a three-dimensional numerical simulation of a turbulent magnetic field in plane geometry are presented. Magnetic percolation, Levy flights, and non-Gaussian random walk of the magnetic-field lines are found for moderate perturbation levels. In such a case plasma transport can be anomalous, i.e., either superdiffusive or subdiffusive. Increasing the perturbation level a Gaussian diffusion regime is attained. The implications on the structure of the electron foreshock and of planetary magnetopauses are discussed.

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