摘要
Based on the conventional tokamak HL-2 A-like parameters and profiles,the linear properties and the nonlinear dynamics of non-resonant kink mode(NRK)and non-resonant fishbone instability(NRFB)in reversed shear tokamak plasmas are investigated by using the global hybrid kinetic-magnetohydrodynamic nonlinear code M3 D-K.This work mainly focuses on the effect of passing energetic-ions on the NRK and NRFB instabilities,which is different from the previous works.It is demonstrated that the NRFB can be destabilized by the passing energeticions when the energetic-ion betaβ;exceeds a critical value.The transition from NRK to NRFB occurs when the energetic-ion betaβ;increases to above a critical value.The resonance condition responsible for the excitation of NRFB is interestingly found to be satisfied atω;+ω;≈ω,whereω;is the toroidal motion frequency,ω;is the poloidal motion frequency andωis the mode frequency.The nonlinear evolutions of NRFB’s mode structures and Poincaréplots are also analyzed in this work and it is found that the NRFB can induce evident energeticion loss/redistribution,which can degrade the performance of the plasmas.These findings are conducive to understanding the mechanisms of NRFB induced energetic-ion loss/redistribution through nonlinear wave-particle interaction.
作者
朱霄龙
王丰
陈伟
王正汹
Xiaolong ZHU;Feng WANG;Wei CHEN;Zhengxiong WANG(Key Laboratory of Materials Modification by Laser,Ion and Electron Beams(Ministry of Eduction),School of Physics,Dalian University of Technology,Dalian 116024,People's Republic of China Key Laboratory of Materials Modification by Laser,Ion and Electron Beams(Ministry of Eduction),School of Physics,Dalian University of Technology,Dalian 116024,People's Republic of China;Joint Laboratory for Fusion Product and Energetic Particles,Southwestern Institute of Physics,Chengdu 610041,People's Republic of China)
基金
support of these experiments and the Supercomputer Center of Dalian University of Technology for providing computing resources
supported by National Natural Science Foundation of China(Nos.11925501,11975068 and 11835010)
China Postdoctoral Science Foundation(No.2021M700674)
the Fundament Research Funds for the Central Universities(No.DUT21GJ205)。