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The authors present two-dimensional stability calculations to show that low-n, pressure driven, external modes in tokamaks can be fully stabilized by resistive walls when the plasma rotates at some fraction of the sound speed. This stabilization can give significant increases in the beta limits imposed by these modes. The stabilization depends on the toroidal coupling of Alfvén and sound waves and is affected by ion Landau damping. This stabilising effect is of particular importance to advanced tokamak configurations that depend on wall stabilization for low-n modes. Stabilization by resistive walls is found to be more effective in cases with more than one resonant surface in the plasma.

Additional information

Authors: WARD D J, Ecole polytechnique fédérale de Lausanne, Centre de recherches en physique des plasmas (CH);BONDESON A, Uppsala University, Department of Technology (SE)
Bibliographic Reference: Article: Plasma Physics and Controlled Nuclear Fusion Research 1994, Vol. 3 (1994) pp. 239-244
ISBN: ISBN 92-0-103795-3; ISSN
Record Number: 199611213 / Last updated on: 1996-11-11
Original language: en
Available languages: en