Observation of internal kink instability purely driven by suprathermal electrons in the HL-1M tokamak
Observation of internal kink instability purely driven by suprathermal electrons in the HL-1M tokamak
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DOI：
10.1088/0029-5515/42/5/301
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发表时间：
2002-05
期刊：
影响因子：
3.3
通讯作者：
X. Ding;Yi Liu;G. Guo;E. Wang;K. Wong;L. Yan;J. Dong;J. Cao;Yao Zhou;J. Rao;Y. Yuan;H. Xia;Y. Liu
中科院分区：
文献类型：
--
作者：
X. Ding;Yi Liu;G. Guo;E. Wang;K. Wong;L. Yan;J. Dong;J. Cao;Yao Zhou;J. Rao;Y. Yuan;H. Xia;Y. Liu
在HL-1 M托卡马克离轴电子回旋共振加热（ECRH）过程中，当回旋共振位置位于磁表面高磁场侧的q = 1面外时，观测到强的m = 1 MHD活动。ECRH中加入低杂波可显著增强MHD激励，但单独的低杂波不能激励或维持该模式。这一结果清楚地证明了由于等离子体中没有高能离子，超热俘获电子对不稳定性的影响。
Strong m = 1 MHD activities are observed in the HL-1M tokamak during off-axis electron cyclotron resonance heating (ECRH) when the cyclotron resonance location is placed just outside the q = 1 surface at the high-magnetic-field side of the magnetic surface. Addition of lower-hybrid waves to ECRH significantly enhances the MHD excitation, but lower-hybrid waves alone cannot excite or sustain the mode. This result is a clear demonstration of the suprathermal trapped electron effect on the instability because of the absence of energetic ions in the plasma.