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Author Santoro, R. A. ♦ Chen, L.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PLASMA PHYSICS AND FUSION ♦ TOKAMAK DEVICES ♦ BALLOONING INSTABILITY ♦ MEDIUM-BETA PLASMA ♦ PLASMA SIMULATION ♦ ALFVEN WAVES ♦ MAGNETOHYDRODYNAMICS ♦ EIGENSTATES ♦ TOROIDAL CONFIGURATION
Abstract A gyrokinetic-magnetohydrodynamic (MHD) hybrid simulation code has been developed in order to study high-{ital n} (where {ital n} is the toroidal mode number) MHD instabilities driven by energetic particles in finite-{beta} tokamaks. Here {beta} is the ratio between plasma and magnetic pressures. Specifically, it is observed that as the core plasma {beta} value increases, there is a corresponding transition from the toroidal Alfv{acute e}n eigenmode (TAE) to the kinetic ballooning mode (KBM). The energetic particle mode (EPM) branches of both the toroidal Alfv{acute e}n mode (TAM) and KBM are shown to be important in this transition. KBM are preferentially excited when the energetic particle velocity is small compared to the Alfv{acute e}n velocity. {copyright} {ital 1996 American Institute of Physics.}
ISSN 1070664X
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-06-01
Publisher Place United States
Journal Physics of Plasmas
Volume Number 3
Issue Number 6


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