Anomalous Diffusion at Edge and Core of a Magnetized Cold Plasma

Details Anomalous Diffusion at Edge and Core of a Magnetized Cold Plasma Anomalous Diffusion at Edge and Core of a Magnetized Cold Plasma

2009-01-23

arxiv.org/abs/0901.3747v1

J. Phys.: Conf. Ser. 71 012002 (2007)

Physics

Plasma Physics

9 pages, 4 figures

Scientific paper

10.1088/1742-6596/71/1/012002

Progress in the theory of anomalous diffusion in weakly turbulent cold magnetized plasmas is explained. Several proposed models advanced in the literature are discussed. Emphasis is put on a new proposed mechanism for anomalous diffusion transport mechanism based on the coupled action of conductive walls (excluding electrodes) bounding the plasma drain current (edge diffusion) together with the magnetic field flux "cutting" the area traced by the charged particles in their orbital motion. The same reasoning is shown to apply to the plasma core anomalous diffusion. The proposed mechanism is expected to be valid in regimes when plasma diffusion scales as Bohm diffusion and at high $B/N$, when collisions are of secondary importance.

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