Published November 2010 | Version v1
Journal article Metadata-only

Gyrokinetic particle simulation of beta-induced Alfven eigenmode

Creators

  • 1. Department of Physics and Astronomy, University of California, Irvine, Irvine, California 92697 (United States)
  • 2. Fusion Simulation Center and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871 (China)
  • 3. Institute for Fusion Theory and Simulation, Zhejiang University, Hangzhou 310027 (China)
  • 4. CAS Key Laboratory of Plasma Physics, University of Science and Technology of China, Hefei, Anhui 230026 (China)

Description

The beta-induced Alfven eigenmode (BAE) in toroidal plasmas is studied using global gyrokinetic particle simulations. The BAE real frequency and damping rate measured in the initial perturbation simulation and in the antenna excitation simulation agree well with each other. The real frequency is slightly higher than the ideal magnetohydrodynamic (MHD) accumulation point frequency due to the kinetic effects of thermal ions. Simulations with energetic particle density gradient show exponential growth of BAE with a growth rate sensitive to the energetic particle temperature and density. The nonperturbative contributions by energetic particles modify the mode structure and reduce the frequency relative to the MHD theory. The finite Larmor radius effects of energetic particles reduce the BAE growth rate. Benchmarks between gyrokinetic particle simulation and hybrid MHD-gyrokinetic simulation show good agreement in BAE real frequency and mode structure.

Additional details

Identifiers

DOI
10.1063/1.3498761;

Publishing Information

Journal Title
Physics of Plasmas
Journal Volume
17
Journal Issue
11
Journal Page Range
p. 112505-112505.7
ISSN
1070-664X
CODEN
PHPAEN

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
43011499
Subject category
S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
Descriptors DEI
ALFVEN WAVES; ANTENNAS; BENCHMARKS; EIGENFUNCTIONS; EIGENVALUES; EXCITATION; ION DENSITY; LARMOR RADIUS; MAGNETOHYDRODYNAMICS; PLASMA DENSITY; PLASMA INSTABILITY; PLASMA SIMULATION
Descriptors DEC
ELECTRICAL EQUIPMENT; ENERGY-LEVEL TRANSITIONS; EQUIPMENT; FLUID MECHANICS; FUNCTIONS; HYDRODYNAMICS; HYDROMAGNETIC WAVES; INSTABILITY; MECHANICS; SIMULATION

Optional Information

Notes
(c) 2010 American Institute of Physics