ABSTRACT

The propagation performance of radiofrequency (RF) waves excited by ICRF antenna in plasma has a great influence on the coupling effect. In this paper, the propagation characteristics of fast wave (FW) and slow wave (SW) under tokamak experimental condition are calculated, and the influence of angular frequency w₀, antenna power spectrum k_//and tokamak total magnetic field B₀ is illustrated based on the typical operating parameters in EAST. By applying perfect matched layer (PML) boundary processing method to simulate single-pass absorption and using finite element method (FEM) to solve Maxwell equations in frequency domain, the propagation and coupling simulation of RF waves in cold plasma for EAST ICRF antenna in B-window were carried out to obtain the polarization characteristics of fields and the relationship between the coupling impedance and the gap length from antenna to the FW cut-off layer. The analysis results in this paper provide useful reference and guidance for the study of propagation coupling of ICRF waves in EAST and other magnetic confined fusion devices.

摘要

ICRF天线激发的射频(RF)波在等离子体中的传播性能对耦合效应有很大影响。本文计算了托卡马克实验条件下快波（FW）和慢波（SW）的传播特性，以及角频率w ₀、天线功率谱k _//和托卡马克总磁场B _{0 的影响}基于 EAST 中的典型操作参数进行说明。通过应用完美匹配层（PML）边界处理方法模拟单通吸收，并使用有限元方法（FEM）在频域中求解麦克斯韦方程，EAST ICRF天线在冷等离子体中的传播和耦合模拟进行了-window，以获得场的极化特性以及耦合阻抗与天线到FW截止层的间隙长度之间的关系。本文的分析结果为研究ICRF波在EAST等磁约束聚变装置中的有用传播耦合提供了参考和指导。