Gyrokinetic particle simulation of beta-induced Alfven eigenmode

Zhang, H S; Lin, Z; Holod, I; Xiao, Y; Wang, X; Zhang, W L

doi:10.1063/1.3498761

Gyrokinetic particle simulation of beta-induced Alfven eigenmode

Journal Article · Mon Nov 15 04:00:00 EST 2010 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3498761· OSTI ID:21531981

Zhang, H S ^[1]; Lin, Z; Holod, I; Xiao, Y ^[2]; Wang, X ^[3]; Zhang, W L ^[4]

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

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.

OSTI ID:: 21531981

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 11 Vol. 17; ISSN PHPAEN; ISSN 1070-664X

Country of Publication:: United States

Language:: English

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Gyrokinetic investigation of the damping channels of Alfvén modes in ASDEX Upgrade Vannini, F.; Biancalani, A.; Bottino, A. Physics of Plasmas, Vol. 27, Issue 4 https://doi.org/10.1063/1.5134979	journal	April 2020
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Gyrokinetic particle simulation of beta-induced Alfven eigenmode

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