Nonlinear Energy Cascading in Turbulence during the Internal Reconnection Event at the Sino-United Spherical Tokamak  

作　　者：柴忪 许宇鸿 高喆 王文浩 刘阳青 谭熠 

机构地区：[1]Department of Engineering Physics,Tsinghua University,Beijing 100084 [2]Southwestern Institute of Physics,Chengdu 610041

出　　处：《Chinese Physics Letters》2017年第2期56-59,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 11261140327,11325524,11475102 and11575057;the Chinese National Fusion Project for ITER under Grant Nos 2013GB112001,2013GB107001 and 2014GB108000;the Tsinghua University Initiative Scientific Research Program;the 221 Program

摘　　要：The characteristics of the energy transfer and nonlinear coupling among edge electromagnetic turbulence in thermal quench sub-period of the internal reconnection event （IRE） are studied at the sino-united spherical tokamak device using multiple Langmuir and magnetic probe arrays. The wavelet bispectral analysis and the modified Kim method are applied to investigate linear growth/damping and nonlinear energy transfer rates, along with multi-field turbulence interactions. The results show a multi-field nonlinear energy transfer from electrostatic to magnetic turbulence that results in two-mode coupling in magnetic turbulence, which may play a crucial role to trigger the IRE.The characteristics of the energy transfer and nonlinear coupling among edge electromagnetic turbulence in thermal quench sub-period of the internal reconnection event （IRE） are studied at the sino-united spherical tokamak device using multiple Langmuir and magnetic probe arrays. The wavelet bispectral analysis and the modified Kim method are applied to investigate linear growth/damping and nonlinear energy transfer rates, along with multi-field turbulence interactions. The results show a multi-field nonlinear energy transfer from electrostatic to magnetic turbulence that results in two-mode coupling in magnetic turbulence, which may play a crucial role to trigger the IRE.

关 键 词：Nonlinear Energy Cascading in Turbulence during the Internal Reconnection Event at the Sino-United Spherical Tokamak kHz 

分 类 号：TL631.24[核科学技术—核技术及应用]