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Phys. Rev. Lett. 42, 1621 - 1624 (1979)

Alfvén Resonance Effects on Magnetosonic Modes in Large Tokamaks

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C. F. F. Karney, F. W. Perkins, and Y. -C. Sun
Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08544

Received 14 August 1978

The theory of Alfvén resonance effects on the wave modes of a tokamak is extended beyond the incompressible magnetohydrodynamic model to include finite-(ω / Ωi) effects and compressibility. The discrete spectrum of compressional Alfvén waves consists of a sequence of frequencies with finite damping decrements resulting from the Alfvén resonance. The finite-frequency effects can cause the damping to almost vanish. This permits Alfvén resonance heating via high-Q eigenmodes in large tokamaks.


©1979 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.42.1621
DOI: 10.1103/PhysRevLett.42.1621

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