Collisional Diffusion in an Axisymmetric Torus
- 1 February 1970
- journal article
- research article
- Published by AIP Publishing in Physics of Fluids
- Vol. 13 (2) , 482-489
- https://doi.org/10.1063/1.1692943
Abstract
Collisional cross‐field diffusion of plasma in a general axisymmetric torus is calculated using the Fokker‐Planck collision term, and a variational principle is found for the diffusion coefficient. Anomalously large transport, as found by Galeev and Sagdeev, occurs where the effective collision frequency is of order or less than the “bounce” frequency of trapped particles. Only unlike‐particle collisions contribute, and the ion and electron diffusion coefficients are equal and independent of any radial electric field; these conclusions differ somewhat from those of Galeev and Sagdeev.Keywords
This publication has 4 references indexed in Scilit:
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- Classical Diffusion of a Stationary Toroidal PlasmaPhysics of Fluids, 1969
- Drift Instabilities in General Magnetic Field ConfigurationsPhysics of Fluids, 1968
- A variational description of transport phenomena in a plasmaAnnals of Physics, 1962