Magnetic turbulence self-sustainment by finite Larmor radius effect
- 1 August 1991
- journal article
- Published by IOP Publishing in Plasma Physics and Controlled Fusion
- Vol. 33 (9) , 1085-1101
- https://doi.org/10.1088/0741-3335/33/9/006
Abstract
A mechanism is proposed for the self-sustainment of a magnetic turbulence resulting from an equilibrium between islands and a chaotic region in a collisionless plasma. It is based on the different behaviour of electrons and ions in the presence of the islands as a result of their different Larmor radii. This effect leads to a difference in their drift velocities and hence to a current which maintains the islands. The mechanism operates for island width smaller than or comparable to the ion Larmor radius. The condition for the self-sustainment of the magnetic turbulence is derived.Keywords
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