Inertia and ion Landau damping of low-frequency magnetohydrodynamical modes in tokamaks

Journal Article · Thu Aug 01 04:00:00 EDT 1996 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.871637· OSTI ID:288218

Bondeson, A ^[1]; Chu, M S ^[2]

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1. Institute for Electromagnetic Field Theory, EURATOM-NFR/Fusion Association, Chalmers University of Technology, S-412 96 Goeteborg (Sweden)
2. General Atomics San Diego, California 92186-9784 (United States)

The inertia and Landau damping of low-frequency magnetohydrodynamical modes are investigated using the drift-kinetic energy principle for the motion along the magnetic field. Toroidal trapping of the ions decreases the Landau damping and increases the inertia for frequencies below ({ital r}/{ital R}){sup 1/2}{ital v}{sub th{ital i}}/{ital qR}. The theory is applied to toroidicity-induced Alfv{acute e}n eigenmodes and to resistive wall modes in rotating plasmas. An explanation of the beta-induced Alfv{acute e}n eigenmode is given in terms of the Pfirsch{endash}Schl{umlt u}ter-like enhancement of inertia at low frequency. The toroidal inertia enhancement also increases the effects of plasma rotation on resistive wall modes. {copyright} {ital 1996 American Institute of Physics.}

• DOE Contract Number: FG03-95ER54309
• OSTI ID: 288218
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 8 Vol. 3; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALFVEN WAVES
KINETIC EQUATIONS
LANDAU DAMPING
MAGNETOHYDRODYNAMICS
PFIRSCH-SCHLUETER REGIME
ROTATING PLASMA
TOKAMAK DEVICES