Nonlinear mode coupling induced high frequency axisymmetric mode on the HL-2A tokamak
作者: P.W. ShiZ.Y. QiuW. ChenZ.B. ShiX.R. DuanG.L. XiaoX.Q. JiZ.C. YangW.L. ZhongM. JiangL.M. YuL.G. ZangR.R. MaJ. WenK.R. FangYi LiuQ.W. YangM. Xu
作者单位: 1Southwestern Institute of Physics, PO Box 432, Chengdu 610041, China
2Institute for Fusion Theory and Simulation, ZJU, Hangzhou 310027, China
3Department of Engineering Physics, Tsinghua University, Beijing 100084, China
刊名: Nuclear Fusion, 2019, Vol.59 (8)
来源数据库: Institute of Physics Journal
DOI: 10.1088/1741-4326/ab1af8
原始语种摘要: Experimental observations and theoretical interpretations are presented in detail for the high frequency axisymmetric mode driven by nonlinear mode coupling. In the neutral beam injection heating plasma, toroidal Alfvén eigenmodes (TAEs) are found to nonlinearly interact with the tearing mode and result in the generation of other Alfvénic sidebands (Chen et al 2014 Europhys. Lett . 107 25001). Then two TAEs couple together and contribute to the excitation of an axisymmetric mode with frequency in the ellipticity-induced Alfvén eigenmode (EAE) frequency region. Direct evidence suggests the axisymmetric modes play an energy transfer channel role during the nonlinear procedure and cause the growth of magnetohydrodynamic instability with finite toroidal mode number via beating with tearing...
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  • 裂开 椭圆率
  • axisymmetric 轴对称的
  • tokamak 托卡马克
  • frequency 频率
  • coupling 连接
  • nonlinear 非线性的
  • ellipticity 椭圆率
  • tearing 椭圆率
  • toroidal 环面
  • generation 世代
  • driven 从动的