典型文献
Sawtooth-like oscillations and steady states caused by the m/n = 2/1 double tearing mode
文献摘要：
The sawtooth-like oscillations resulting from the m/n = 2/1 double tearing mode(DTM)are numerically investigated through the three-dimensional,toroidal,nonlinear resistive-MHD code(CLT).We find that the nonlinear evolution of the m/n = 2/1 DTM can lead to sawtooth-like oscillations,which are similar to those driven by the kink mode.The perpendicular thermal conductivity and the external heating rate can significantly alter the behaviors of the DTM driven sawtooth-like oscillations.With a high perpendicular thermal conductivity,the system quickly evolves into a steady state with m/n = 2/1 magnetic islands and helical flow.However,with a low perpendicular thermal conductivity,the system tends to exhibit sawtooth-like oscillations.With a sufficiently high or low heating rate,the system exhibits sawtooth-like oscillations,while with an intermediate heating rate,the system quickly evolves into a steady state.At the steady state,there exist the non-axisymmetric magnetic field and strong radial flow,and both are with helicity of m/n = 2/1.Like the steady state with m/n = 1/1 radial flow,which is beneficial for preventing the helium ash accumulation in the core,the steady state with m/n = 2/1 radial flow might also be a good candidate for the advanced steady state operations in future fusion reactors.We also find that the behaviors of the sawtooth-like oscillations are almost independent of tokamak geometry,which implies that the steady state with saturated m/n = 2/1 islands might exist in different tokamaks.
文献关键词：
中图分类号：
作者姓名：
Wei ZHANG;Zhiwei MA;Haowei ZHANG;Xin WANG
作者机构：
Institute for Fusion Theory and Simulation,Department of Physics,Zhejiang University,Hangzhou 310027,People's Republic of China
文献出处：
引用格式：
[1]Wei ZHANG;Zhiwei MA;Haowei ZHANG;Xin WANG-.Sawtooth-like oscillations and steady states caused by the m/n = 2/1 double tearing mode)[J].等离子体科学和技术（英文版）,2022(03):89-97
A类：
Sawtooth,tokamaks
B类：
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AB值：
0.445632
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