The advance of magnetic diagnostics system in support of EAST long-pulsed operation

作     者：陈大龙 沈飊 石同辉 郭笔豪 李婷玉 陈力行 薛敏敏 楚南 Dalong CHEN;Biao SHEN;Tonghui SHI;Bihao GUO;Tingyu LI;Lixing CHEN;Minmin XUE;Nan CHU

作者机构：Institute of Plasma PhysicsChinese Academy of SciencesHefei 230031People’s Republic of China College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060People’s Republic of China School of Optoelectronic EngineeringGuilin University of Electronic TechnologyGuilin 541004People’s Republic of China 

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

年 卷 期：2023年第25卷第12期

页      面：40-47页

核心收录：

学科分类：08[工学] 0827[工学-核科学与技术] 082701[工学-核能科学与工程] 0702[理学-物理学] 

基　　金：supported by the National Magnetic Confinement Fusion Program of China(Nos.2018YFE0302100 and 2022YFE03010002) National Natural Science Foundation of China(Nos.12205195) 

主　　题：EAST magnetic diagnostics MHD disruption FOCS 

摘      要：In EAST long-pulsed discharge(hundreds of seconds),electric magnetic diagnosis(EMD)is very important,since EMD not only monitors tokamak security status but also provides accurate measurement accuracy for reconstruction of the plasma *** avoid current measurement drift,a fiber optic current sensor,based on the Faraday effect,is developed and used for poloidal and plasma current feedback control for the first time,relative current measurement accuracy is within 0.5%.To ensure plasma boundary control accuracy,a detailed set of magnetic measurement calibration methods is developed before the plasma *** maximum relative error is less than 1%,the corresponding control accuracy is within 1 *** minimize integrator drift error,a long-pulse integrator test is essential,the corresponding drift error needs to be subtracted in plasma control ***,the saddle coil and Mirnov coil not only help to detect MHD issues,but are also utilized for plasma disruption prediction during the long-pulse discharge.