Nonlinear hybrid simulation of the toroidicity-induced Alfven eigenmode

Journal Article · Sun Feb 26 23:00:00 EST 1995 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.74.1594· OSTI ID:6448871

Fu, G Y; Park, W ^[1]

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

Gyrokinetic-magnetohydrodynamic hybrid simulations have been carried out to study the nonlinear saturation of the torodicity-induced Alfven eigenmode driven by energetic particles in a tokamak plasma. It is shown that wave-particle trapping is the nonlinear saturation mechanism for the parameters considered. The corresponding density profile flattening of the hot particles is observed. The saturation amplitude is proportional to the square of the linear growth rate. In addition, a new [ital n]=1,[ital m]=0 global Alfven eigenmode is shown to be excited by the energetic particles.

• DOE Contract Number: AC02-76CH03073
• OSTI ID: 6448871
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 74:9; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700340* -- Plasma Waves
Oscillations
& Instabilities-- (1992-)
ALFVEN WAVES
AMPLITUDES
ANNULAR SPACE
CLOSED CONFIGURATIONS
CONFIGURATION
DATA
ENERGY-LEVEL TRANSITIONS
EXCITATION
FLUID MECHANICS
GYROFREQUENCY
HYDRODYNAMICS
HYDROMAGNETIC WAVES
INFORMATION
INSTABILITY GROWTH RATES
MAGNETIC FIELD CONFIGURATIONS
MAGNETOHYDRODYNAMICS
MECHANICS
NONLINEAR PROBLEMS
NUMERICAL DATA
OSCILLATION MODES
PLASMA
PLASMA DENSITY
SATURATION
SIMULATION
SPACE
THEORETICAL DATA
TOROIDAL CONFIGURATION
TRAPPING