Estimation of magnetic island width by the fluctuations of electron cyclotron emission radiometer on J-TEXT

作     者：阮博文 杨州军 潘晓明 周豪 常风岐 周静 Bowen RUAN;Zhoujun YANG;Xiaoming PAN;Hao ZHOU;Fengqi CHANG;Jing ZHOU

作者机构：International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2019年第21卷第1期

页      面：24-28页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0827[工学-核科学与技术] 0702[理学-物理学] 

基　　金：supported by the National Magnetic Confinement Fusion Program of China (Nos. 2015GB120003 and 2014GB108001) 

主　　题：magnetic island width ECE relative temperature perturbation J-TEXT tokamak 

摘      要：The width of a magnetic island is an important parameter for the quantitative analysis of magnetohydrodynamic-related physics. An electron cyclotron emission radiometer(ECE) is a powerful tool that can be used to obtain this width, which can usually be determined from the flat temperature distribution at the O-point phase or the maxima temperature perturbation. An improved method to estimate the width of a magnetic island is proposed in this paper, and it is independent of calibration. With this method and the existing 24-channel ECE system, the width of a rotation magnetic island can be estimated. Additionally, by filtering the fluctuation ECE signal, the evolution of the magnetic island can be obtained. The results of this method are consistent with those of the integrated magnetic probe signals, which represent the relative change of the magnetic island.