摘要
利用磁探针对ＨＴ－６Ｂ托卡马克上的Ｍｉｒｎｏｖ扰动的大环模数进行了分辨，发现在一次放电过程中ｎ＝１、２、３、４的模数同时存在。对各模的频谱分析表明，当扰动较小时，各模扰动具有同为２０ｋＨｚ的单一频率；当扰动增大时，各模在２０ｋＨｚ的基础上出现４０ｋＨｚ的倍频。倍频出现的合理解释是磁岛岛宽的振荡。
The toroidal numbers of Mirnov oscillations in the HT 6B tokamak are distinguished by using magnetic coils.The results show that the n=1,2,3,4 modes exist simultaneously in tokamak discharge.Spectrum analysis indicates that the oscillations of every mode have same 20kHz frequency when their amplitudes are small.When the amplitudes increase,there is a double frequency with 40kHz appearing in spectrum with 20kHz oscillation.A reasonable explanation of the double frequency is the width oscillation of the magnetic island.
出处
《核聚变与等离子体物理》
CAS
CSCD
北大核心
1998年第4期37-42,共6页
Nuclear Fusion and Plasma Physics
