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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, which is due to 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 widths smaller than or comparable to the ion Larmor radius. The condition for the self-sustainment of the magnetic turbulence is derived.

Additional information

Authors: REBUT P H, JET Joint Undertaking, Abingdon, Oxon. (GB);HUGON M, JET Joint Undertaking, Abingdon, Oxon. (GB)
Bibliographic Reference: Report: JET-P(90)58 EN (1990)
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 199110535 / Last updated on: 1994-12-02
Original language: en
Available languages: en