Nonlinear Generation of Zonal Fields by the Beta-Induced Alfvén Eigenmode in Tokamak

Zhang, Huasen; Lin, Zhihong

doi:10.1088/1009-0630/15/10/02

Nonlinear Generation of Zonal Fields by the Beta-Induced Alfvén Eigenmode in Tokamak

Journal Article · Tue Oct 01 00:00:00 EDT 2013 · Plasma Science and Technology

DOI:https://doi.org/10.1088/1009-0630/15/10/02· OSTI ID:1565194

Zhang, Huasen ^[1]; Lin, Zhihong ^[2]

Peking Univ., Beijing (China). Fusion Simulation Center
Peking Univ., Beijing (China). Fusion Simulation Center; Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy

The zonal fields effect on the beta-induced Alfvén eigenmode (BAE) destabilized by the energetic particles in toroidal plasmas is studied through the gyrokinetic particle simulations. It is found that the localized zonal fields with a negative value around the mode rational surface are generated by the nonlinear BAE. In the weakly driven case, the zonal fields with a strong geodesic acoustic mode (GAM) component have weak effects on the nonlinear BAE evolution. In the strongly driven case, the zonal fields are dominated by a more significant zero frequency component and have stronger effects on the nonlinear BAE evolution.

View Accepted Manuscript (DOE)

Research Organization:: ITER; Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); SciDAC GSEP Center

Sponsoring Organization:: USDOE Office of Science (SC)

OSTI ID:: 1565194

Alternate ID(s):: OSTI ID: 22300653

Journal Information:: Plasma Science and Technology, Journal Name: Plasma Science and Technology Journal Issue: 10 Vol. 15; ISSN 1009-0630

Publisher:: IOPScienceCopyright Statement

Country of Publication:: United States

Language:: English

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Nonlinear Generation of Zonal Fields by the Beta-Induced Alfvén Eigenmode in Tokamak

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