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高频离子声波由于Landau阻尼很大,一般难以激发。本文研究了表面约束稳态装置上高频离子声波的激发特性。实验表明,仔细控制放电参数可以激发起纯离子声波,密度涨落n/n_o最大可以达到7.5％。
High-frequency ion acoustic waves due to Landau damping large, generally difficult to stimulate. In this paper, the excitation characteristics of high-frequency ion acoustic waves on a surface-confined steady-state device are studied. Experiments show that careful control of the discharge parameters can stimulate pure ion sound waves, the density fluctuation n / n_o up to 7.5%.