HL-2A装置中阿尔芬本征模的数值模拟

采用GTAW程序模拟研究了HL-2A装置等离子体中的阿尔芬(Alfvén)本征模,得到了典型放电条件下的本征频率和模结构及等离子体密度分布对本征频率和模结构的影响。计算得到的环形阿尔芬本征模（TAE）间隙中的本征频率99.09、74.90和99.17 kHz与实验观察到的高频Alfvén本征模频率相吻合。计算还发现,等离子体中心电子密度的增大会导致TAE的本征频率减小,但不影响模的径向位置和结构。     

Lower-Hybrid Drift Instability in Modified Harris Current Sheet

Lower-hybrid drift instability （LHDI） in a Harris current sheet including a uniform background distribution is investigated in linear local kinetic theory. It is found that the introduction of a uniform background distribution reduces the growth rate and real frequency of LHDI at all wavelengths. Some physical explanations about the effects of the background distribution are provided.