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ZHANG Huasen (张桦森), LIN Zhihong (林志宏). Nonlinear Generation of Zonal Fields by the Beta-Induced Alfvén Eigenmode in Tokamak[J]. Plasma Science and Technology, 2013, 15(10): 969-973. DOI: 10.1088/1009-0630/15/10/02
Citation: ZHANG Huasen (张桦森), LIN Zhihong (林志宏). Nonlinear Generation of Zonal Fields by the Beta-Induced Alfvén Eigenmode in Tokamak[J]. Plasma Science and Technology, 2013, 15(10): 969-973. DOI: 10.1088/1009-0630/15/10/02

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

  • 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.
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