托卡马克中宏观不稳定性以及等离子体响应对快离子再分布的影响

中性束注入(NBI)是磁约束核聚变装置上至关重要的辅助加热手段之一,其产生的快离子显著影响宏观不稳定性以及等离子体运行参数，所以理解快离子的动力学行为非常重要。磁流体不稳定性以及等离子体响应产生的扰动磁场可以引起快离子的再分布和损失，而相关研究主要集中在实验方面，相关的理论和数值模拟研究较少。本课题拟基于磁流体不稳定性模拟程序包MARS-F\K以及粒子轨道模拟程序（如ORBIT,SPIRAL），数值模拟研究环形等离子体中宏观不稳定性以及三维扰动场对快离子再分布的影响,这里宏观不稳定性主要是指考虑了粒子动理学效应的鱼骨模和电阻壁模式，三维扰动场是指考虑了热粒子动理学效应的等离子体响应产生的扰动场。相关的研究成果可为国内聚变装置 HL-2A/2M,EAST上的快离子物理实验提供物理支持以及优化辅助加热系统。

Neutral beam injection (NBI) is one of the important auxiliary heating method for the magnetic confined fusion device. The fast ions generated by NBI have significant effect on the macro-instabilities in tokamak and determine the operation parameter region of tokamak. Hence, it is important to understand the fast ion dynamics in tokamak plasma.The perturbed field generated by the instability and plasma response can strongly induce the fast ion redistribution and loss. However, in past decades, the study of the fast ion redistribution is mainly carried out experimently. Less attention was paid to the simulation of fast ion redistribution induced by perturbed field. This research program focuses on the study of the effect of macroscopic instabilities and plasma response on the fast ion redistribution in toroidal plasma, based on the code MARS-F\K and the following particle orbit code ,such as ORBIT，SPIRAL. Here, we will consider the kinetic correction on the mode structure by the particle kinetic effect in the instabilty computation and consider the thermal particle kinetic effect in plasma response calcultion. The obtained results are expected to support the experiment observations on HL-2A/M and EAST. It is possible that the obtained results will supply the suggestions for optimization of the NBI system.