Cai Huishan, Li Ding
Chinese Academy of Sciences Key Laboratory of Geospace Environment, School of Nuclear Sciences and Technology, University of Science and Technology of China, Hefei 230026, China.
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
Natl Sci Rev. 2022 Feb 15;9(11):nwac019. doi: 10.1093/nsr/nwac019. eCollection 2022 Nov.
The dynamics of energetic particles and tearing modes and the interactions between them are of great significance for magnetically confined fusion plasmas. In this review, we focus on these issues in the context of tokamak plasmas. The interaction between energetic particles and tearing modes is considered from two perspectives: (i) the influence of energetic particles on tearing modes and (ii) the transport of energetic particles by tearing modes. The influence of energetic particles on tearing modes is described on the basis of a general dispersion relation for tearing modes. The effects of energetic particles are considered separately in the outer region and the island region of a tearing mode. The physics mainly results from the modification of the perturbed parallel current by energetic particles without wave-particle resonance. In addition, the resonance between energetic particles and tearing modes is also reviewed. For the transport of energetic particles, transport of both circulating and trapped energetic particles by tearing mode is reviewed. Our descriptions of physical phenomena here are based on an analytical approach, while the experiments and simulations are used to illustrate and confirm our results. Finally, a number of open issues are discussed.
高能粒子与撕裂模的动力学及其相互作用对磁约束聚变等离子体具有重要意义。在本综述中，我们将在托卡马克等离子体的背景下关注这些问题。从两个方面考虑高能粒子与撕裂模的相互作用：（i）高能粒子对撕裂模的影响；（ii）撕裂模对高能粒子的输运。基于撕裂模的一般色散关系描述了高能粒子对撕裂模的影响。分别在撕裂模的外部区域和岛区考虑高能粒子的影响。其物理机制主要源于高能粒子对扰动平行电流的修正，而不存在波粒共振。此外，还综述了高能粒子与撕裂模之间的共振。对于高能粒子的输运，综述了撕裂模对循环和捕获高能粒子的输运。我们在此对物理现象的描述基于解析方法，同时利用实验和模拟来说明和证实我们的结果。最后，讨论了一些未解决的问题。
