KT-5B托卡马克上离子伯恩斯坦波的传播特性

PROPAGATION OF ION BERNSTEIN WAVE IN KT-5B TOKAMAK

一、引 言 在一些较大型的托卡马克装置上的研究业已表明,应用外激发离子伯恩斯坦波(IBW)对托卡马克等离子体进行辅助加热是一种极具有竞争力的方法。然而,对在托卡马克位形的等离于体中,IBW的激发、传播等一些基本过程,仍需做进一步的实验研究。我们利用小型装置的低温、低密度特点,采用高空间分辨的射频(RF)

Propagation properties of ion Bernstein wave (IBW) in the KT-5B tokamak have been investigated. During the propagation in the plasma edge region,the amplitude of IBW varies obviously. This is probably due to the partly shield of IBW by the limiters located at both ends of the IBW antenna. The phenomena of the third harmonic cyclotron resonance and absorption of IBW caused by deuterium-like minority ions have been observed. The wave-front-surface on a vertical cord has been determined and the results show that the wave front near the plasma center goes somewhat backward compared with that near the plasma edge.