Influence of 3D helical magnetic perturbations on runaway electron generation in J-TEXT tokamak  

作　　者：Wei YAN Guinan ZOU Zhongyong CHEN You LI Jiangang FANG Zhifang LIN Zhonghe JIANG Nengchao WANG Bo RAO Yangbo LI Zhengkang REN Chuanxu ZHAO Yu ZHONG Fanxi LIU Yinlong YU Zisen NIE Xun ZHOU Yuan SHENG Yuwei SUN Song ZHOU Xiaoqing ZHANG Zhoujun YANG Zhipeng CHEN Yonghua DING the J-TEXT Team 严伟;邹癸南;陈忠勇;李由;方建港;林志芳;江中和;王能超;饶波;李杨波;任正康;赵传旭;钟昱;刘凡溪;喻寅龙;聂子森;周洵;盛源;孙玉伟;周松;张晓卿;杨州军;陈志鹏;丁永华;the J-TEXT Team(State Key Laboratory of Advanced Electromagnetic Technology,International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,People’s Republic of China;School of Electrical Engineering&Automation,Jiangsu Normal University,Xuzhou 221116,People’s Republic of China;不详)

机构地区：[1]State Key Laboratory of Advanced Electromagnetic Technology,International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,People’s Republic of China [2]School of Electrical Engineering&Automation,Jiangsu Normal University,Xuzhou 221116,People’s Republic of China [3]不详

出　　处：《Plasma Science and Technology》2025年第3期36-44,共9页等离子体科学和技术(英文版)

基　　金：supported by the National Magnetic Confinement Fusion Energy R&D Program of China (Nos.2018YFE0309103 and 2019YFE03010004);National Natural Science Foundation of China (Nos.12475222,12205122,and 51821005);Hubei International Science and Technology Cooperation Projects (No.2022EHB003)。

摘　　要：A large number of runaway electrons(REs)generated during disruption can cause significant damage to next-generation large-scale tokamaks.The influence of three-dimensional(3D)helical magnetic perturbations on the suppression of RE generation was explored using a set of 3D helical coils in J-TEXT tokamak,which can excite m/n=-2/2 helical magnetic perturbations.Experimental evidence shows that the-2/2 magnetic perturbations caused by the opposite coil current direct plasma toward the high-field side,simultaneously enhancing the magnetic fluctuations,which would enhance the radial loss of REs and even prevent RE generation.On the other hand,-2/2 magnetic perturbations can also reduce the cooling time during the disruption phase and generate a population of high-energy REs,which can interact with high-frequency magnetic fluctuations and in turn suppress RE generation.The critical helical coil current was found to correlate with electron density,requiring higher coil currents at higher densities.According to the statistical analysis of RE generation at different electron densities,the applied-2/2 magnetic perturbations can increase the magnetic fluctuations to the same level at lower electron densities,which can decrease the threshold electron density for RE suppression.This will be beneficial for RE mitigation in future large tokamak devices.

关 键 词：3D helical magnetic perturbations runaway electron J-TEXT tokamak 

分 类 号：TL6[核科学技术—核技术及应用]