摘要
密度变化首先用一个最新发达的多信道的冷杉木干涉仪系统在 HL-2A tokamak 血浆的核心区域被测量。在 diver 岩山欧姆的分泌物，我们测量了 5% 的光线的密度变化层次，它在 MHD 的外观期间增加到 10-20% 活动。大多数在密度变化光谱的力量密度直接与 m = 被联系 2 撕模式。到 1/3 和血浆监禁的变化层次还原剂被改进在期间离开加热的轴 electron-cyclotron-resonance (ECRH ) 。
Density fluctuations were first measured in the core region of HL-2A tokamak plasma using a newly developed multi-channel FIR interferometer system. In divertor ohmic discharges, we measured the radial density fluctuation levels of 5%, which increase to 10-20% during the appearance of MHD activity. Most of the power density in the density fluctuation spectrum is directly associated with m = 2 tearing modes. The fluctuation levels reduce to 1/3 and plasma confinement is improved during off-axis electron-cyclotron-resonance heating （ECRH）.
基金
Supported by the National Natural Science Foundation of China under Grant Nos 10575030 and 10675043. The authors acknowledge the HL-2A team and Dr. L. W. Yan for useful discussion.
