On resonant destabilization of toroidal Alfven eigenmodes by circulating and trapped energetic ions/alpha particles in tokamaks

Journal Article · Sat Aug 01 00:00:00 EDT 1992 · Physics of Fluids B; (United States)

DOI:https://doi.org/10.1063/1.860208· OSTI ID:7285218

Biglari, H; Zonca, F; Chen, L ^[1]

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1. Princeton Plasma Physics Laboratory, Princeton University, P. O. Box 451, Princeton, New Jersey 08543 (United States)

Toroidal Alfven eigenmodes are shown to be resonantly destabilized by {ital both} circulating {ital and} trapped energetic ions/alpha particles. In particular, the energetic circulating ions are shown to resonate with the mode not only at the Alfven speed ({ital v}{sub A}), but also at one-third of this speed, while for trapped ions, the dominant instability mechanism is shown to be due to the resonance between the precessional magnetic drift and the wave. Implications of the theory for present and future tokamaks are discussed.

• DOE Contract Number: AC02-76CH03073
• OSTI ID: 7285218
• Journal Information: Physics of Fluids B; (United States), Vol. 4:8; ISSN 0899-8221
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALFVEN WAVES
RESONANCE
TOKAMAK DEVICES
ALPHA PARTICLES
BALLOONING INSTABILITY
MAGNETOHYDRODYNAMICS
PLASMA MICROINSTABILITIES
TOROIDAL CONFIGURATION
ANNULAR SPACE
CHARGED PARTICLES
CLOSED CONFIGURATIONS
CLOSED PLASMA DEVICES
CONFIGURATION
FLUID MECHANICS
HYDRODYNAMICS
HYDROMAGNETIC WAVES
INSTABILITY
MAGNETIC FIELD CONFIGURATIONS
MECHANICS
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
SPACE
THERMONUCLEAR DEVICES
700340* - Plasma Waves
Oscillations
& Instabilities- (1992-)
700310 - Plasma Confinement- (1992-)