空间傅里叶分析法识别MHD扰动模式

Determination of MHD mode with spatial Fourier analysis

讨论了用空间傅里叶分析法确定托卡马克等离子体MHD磁扰动模式的方法。根据托卡马克实验的状况,对不同情况下的MHD磁扰动进行了详细的数值模拟,重点分析了该方法的系统误差,模拟结果与HL 1M装置上的实验结果进行了对比。比较结果表明,用空间傅里叶分析法识别托卡马克中的MHD扰动模式是一种可以行之有效的方法。

The determination of MHD mode with spatial Fourier analysis is presented. In accordance with the situation of tokamak experiment, we run the simulation code under condition including the noise, the asymmetry of amplitude and the phase of Mirnov perturbation signals, etc. The systematic error of the method has been analyzed emphatically. A comparison between simulation results and the experimental data from the HL-1M tokamak are given as well. The simulation results indicate that the spatial Fourier analysis is a better method to determine the MHD perturbation mode in tokamak.