HL-2A/2M上基于输运代码EMC3-EIRENE的边缘杂质输运研究

托卡马克边缘杂质输运的研究对于杂质的控制及脱靶偏滤器运行至关重要，是实现高性能等离子体运行的关键。共振磁扰动（RMP）线圈作为控制ELM行为的有效手段之一，已被安装在多个托卡马克装置上，因此三维磁结构下的输运研究越来越受到重视。输运代码EMC3-EIRENE在处理托卡马克三维场中的边缘输运方面显示了强大的能力。由于RMP线圈在HL-2A/2M上的使用，将EMC3-EIRENE代码应用于HL-2A/2M等离子体中是非常必要及重要的。本项目的主要目的是在HL-2A/2M装置上利用EMC3-EINENE输运代码开展边缘输运的相关研究。针对不同的磁场位形创建相应的三维计算网格，通过与探针数据的比对得到垂直输运系数。测量辅助加热下杂质的空间分布，通过与模拟计算的比对，研究辅助加热对杂质产生及输运行为的影响。对偏滤器区杂质的二维辐射结构进行观测，结合模拟计算分析磁场结构与杂质输运的关系。

The research of edge impurity transport in tokamak plasmas is essentially important for impurity control and detached divertor operation, which are the key points to realize high-performance plasma. As one of effective methods to control the ELM behaviour, the resonant magnetic perturbation (RMP) coils have been widely installed in tokamaks, therefore, the resultant transport with three dimensional magnetic structure is getting more attention. The transport code EMC3-EIRENE initially developed for stellarator shows powerful capability to investigate the 3D effects on edge transport in tokamak. Since the application of RMP coils to HL-2A/2M, it is necessary to apply the EMC3-EIRENE code to HL-2A/2M plasmas. The main purposes of this project are to run this code with HL-2A/2M discharge configurations, and to conduct the preliminary physical analysis based on the experimental results. According to different discharge configurations, the corresponding three dimensional computing grids are created, and the cross-field transport coefficients are deduced by comparing the simulation result with experimental one obtained from probe diagnostic system. The impurity distributions in discharges with auxiliary heating are observed, and the influence of auxiliary heating on the impurity production and transport is studied by comparing with the simulation results. The relationship between the magnetic field structure and the impurity transport in divertor region is analysed based on the observations and simulations.