Shielding of resonant magnetic perturbations by rotation

descriptionPublicationkeyboard_double_arrow_right Article 01 Dec 1996 English Publisher:AIP PublishingJournal:Physics of Plasmas, volume 3, pages 4,620-4,627 (issn: 1070-664X, eissn: 1089-7674,

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Authors: Boozer, A.;

doi: 10.1063/1.871585

handle: 11858/00-001M-0000-0027-8C9E-A

Shielding of resonant magnetic perturbations by rotation

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Abstract

Magnetic perturbations that drive islands are shielded from a rotating plasma by either a torque limit or an equilibrium limit. The physics of the shielding is given in a simple slab model along with the mechanism by which the shielding currents are maintained. Shielding currents in a channel of width Δ are damped by a resistance η/Δ with η the resistivity. If an island is shielded in a nearly ideal plasma, η/Δ=(μ0/π)VpAM2p with VpA the poloidal Alfvén speed, Mp≡v⊥/VpA, and v⊥ the speed of the cross-field flow at the resonance surface.

Related Organizations

Max Planck Society
Germany
King’s University
United States
Max Planck Institute for Plasma Physics
Germany

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