Experimental evidence of nonlinear avalanche dynamics of energetic particle modes
Experimental evidence of nonlinear avalanche dynamics of energetic particle modes
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DOI：
10.1209/0295-5075/ac3ccf
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发表时间：
2021-09
期刊：
影响因子：
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通讯作者：
Li-Ming Yu;F. Zonca;Zhiyong Qiu;Liu Chen;Wei Chen;X. Ding;X. Ji;Tao Wang;T.B. Wang;R. Ma;B. Yuan;P. Shi;Y.G. Li;L. Liu;Z. Shi;J.Y. Cao;J. Dong;Yi Liu;Q.W. Yang;M. Xu
中科院分区：
文献类型：
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作者：
Li-Ming Yu;F. Zonca;Zhiyong Qiu;Liu Chen;Wei Chen;X. Ding;X. Ji;Tao Wang;T.B. Wang;R. Ma;B. Yuan;P. Shi;Y.G. Li;L. Liu;Z. Shi;J.Y. Cao;J. Dong;Yi Liu;Q.W. Yang;M. Xu
Recent observations in HL-2A tokamak give new experimental evidences of energetic particle mode (EPM) avalanche. In a strong EPM burst, the mode structure propagates radially outward within two hundred Alfvén time, while the frequency of the dominant mode changes self-consistently to maximize wave-particle power exchange and mode growth. This suggests that significant energetic particle transport occurs in this avalanche phase, in agreement with theoretical framework of EPM convective amplification. A simplified relay runner model yields satisfactory interpretations of the measurements. The results can help understanding the nonlinear dynamics of energetic particle driven modes in future burning plasmas, such as ITER.
