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

Zimbardo, G. and Veltri, P. (1997) Plasma transport in the interplanetary space: Percolation and anomalous diffusion of magnetic-field lines. Il nuovo cimento C, 20 C (6). pp. 897-902. ISSN 1826-9885

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Abstract

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 here. Magnetic percolation, L´evy 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.

Item Type:	Article
Additional Information:	Paper presented at the VII Cosmic Physics National Conference, Rimini, October 26-28, 1994.
Uncontrolled Keywords:	Transport properties; magnetohydrodynamics and plasmas; conference proceedings
Subjects:	500 Scienze naturali e Matematica > 530 Fisica 500 Scienze naturali e Matematica > 550 Scienze della Terra > 551 Geologia, Idrologia, Meteorologia > 551.5 Meteorologia (Classificare qui l'atmosfera) (Classificare la previsione e le previsioni di specifici fenomeni meteorologici in 551.64; classificare la Micrometeorologia in 551.66) > 551.52 Termodinamica, interazioni atmosferiche con la superficie terrestre, temperature, radiazioni > 551.527 Radiazioni (per fenomeni ottici, vedi 551.565) > 551.5276 Radiazioni cosmiche (Include il rumore cosmico) (Classificare qui i raggi cosmici)
Depositing User:	Marina Spanti
Date Deposited:	09 Feb 2018 09:19
Last Modified:	09 Feb 2018 09:19
URI:	http://eprints.bice.rm.cnr.it/id/eprint/12398

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