Interaction between energetic-ions and internal kink modes in a weak shear tokamak plasma

作     者：Xiaolong ZHU Feng WANG Wei CHEN Zhengxiong WANG 朱霄龙;王丰;陈伟;王正汹

作者机构：Key Laboratory of Materials Modification by LaserIon and Electron Beams(Ministry of Eduction)School of PhysicsDalian University of TechnologyDalian 116024People's Republic of China Key Laboratory of Materials Modification by LaserIon and Electron Beams(Ministry of Eduction)School of PhysicsDalian University of TechnologyDalian 116024People's Republic of China Joint Laboratory for Fusion Product and Energetic ParticlesSouthwestern Institute of PhysicsChengdu 610041People's Republic of China 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2022年第24卷第2期

页      面：28-35页

核心收录：

学科分类：08[工学] 082701[工学-核能科学与工程] 0827[工学-核科学与技术] 

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) 

主　　题：energetic-ions non-resonant fishbone weak shear loss/redistribution 

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 *** work mainly focuses on the effect of passing energetic-ions on the NRK and NRFB instabilities,which is different from the previous *** is demonstrated that the NRFB can be destabilized by the passing energeticions when the energetic-ion betaβ;exceeds a critical *** transition from NRK to NRFB occurs when the energetic-ion betaβ;increases to above a critical *** 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 *** 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 *** findings are conducive to understanding the mechanisms of NRFB induced energetic-ion loss/redistribution through nonlinear wave-particle interaction.