Fast Zonal Field Dynamo in Collisionless Kinetic Alfven Wave Turbulence

Fast Zonal Field Dynamo in Collisionless Kinetic Alfven Wave Turbulence

The possibility of fast dynamo action by collisionless kinetic Alfven Wave turbulence is demonstrated. The irreversibility necessary to lock in the generated field is provided by electron Landau damping, so the induced electric field does not vanish with resistivity. Mechanisms for self-regulation o...

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Veröffentlicht in:arXiv.org 2001-01
Hauptverfasser: Gruzinov, I, Das, A, Diamond, P H
Format: Artikel
Sprache:eng
Schlagworte:
Electric fields
Fluid dynamics
Landau damping
Magnetohydrodynamics
Turbulence
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Zusammenfassung:The possibility of fast dynamo action by collisionless kinetic Alfven Wave turbulence is demonstrated. The irreversibility necessary to lock in the generated field is provided by electron Landau damping, so the induced electric field does not vanish with resistivity. Mechanisms for self-regulation of the system and the relation of these results to the theory of alpha quenching are discussed. The dynamo-generated fields have symmetry like to that of zonal flows, and thus are termed zonal fields.
ISSN:2331-8422
DOI:10.48550/arxiv.0101159