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本文给出了1986年5月在HT-6B上进行的二倍频ECR预电离实验的结果。实验观察到只要回旋共振层落在托卡马克小截面内都可获得正常放电波形;等离子体电流基本上是和环电压同时出现的;等离子体环电压下降30％左右。同时还观察到ECR预电离对减少放电初期的硬X射线和轻杂质(CⅣ)的辐射有比较明显的作用。
This paper presents the results of a double-frequency ECR pre-ionization experiment conducted on the HT-6B in May 1986. It is observed that the normal discharge waveform can be obtained as long as the cyclotron resonance layer falls within the small section of the tokamak; the plasma current basically coincides with the ring voltage; and the plasma ring voltage drops about 30%. It has also been observed that ECR pre-ionization has a significant effect on reducing the radiation of hard X-rays and light impurities (C IV) at the beginning of discharge.