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Paper detail

Experimental Evidence of Nonlinear Avalanche Dynamics of Energetic Particle Modes

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.

preprint2021arXivOpen access
L. M. YuF. ZoncaZ. Y. QiuL. ChenW. ChenX. T. DingX. Q. JiT. WangT. B. WangR. R. MaB. S. YuanP. W. ShiY. G. LiL. LiuZ. B. ShiJ. Y. CaoJ. Q. DongYi LiuQ. W. YangM. Xu
physics.plasm-ph
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L. M. YuF. ZoncaZ. Y. QiuL. ChenW. ChenX. T. DingX. Q. JiT. WangT. B. WangR. R. MaB. S. YuanP. W. ShiY. G. LiL. LiuZ. B. ShiJ. Y. CaoJ. Q. DongYi LiuQ. W. YangM. Xu

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