Tunable biasing magnetic field design of ferrite tuner for ICRF heating system in EAST

作     者：Manman XU Yuntao SONG Gen CHEN Yanping ZHAO Yuzhou MAO Guang LIU Zhen PENG 徐曼曼;宋云涛;陈根;赵燕平;毛玉周;刘广;彭振

作者机构：Institute of Plasma PhysicsChinese Academy of SciencesHefei 230031People's Republic of China University of Science and Technology of ChinaHefei 230026People's Republic of China 

基　　金：supported by National Natural Science Foundation of China(Grant No.11575237) the National Magnetic Confinement Fusion Science Program(Grant No.2015GB101001) the International Scientific and Technological Cooperation Project of Anhui(Grant No.1704e1002207) 

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

年 卷 期：2017年第19卷第11期

页      码：82-91页

摘      要：Ion cyclotron range of frequency（ICRF） heating has been used in tokamaks as one of the most successful auxiliary heating tools and has been adopted in the EAST. However, the antenna load will fluctuate with the change of plasma parameters in the ICRF heating process. To ensure the steady operation of the ICRF heating system in the EAST, fast ferrite tuner（FFT） has been carried out to achieve real-time impedance matching. For the requirements of the FFT impedance matching system, the magnet system of the ferrite tuner（FT） was designed by numerical simulations and experimental analysis, where the biasing magnetic circuit and alternating magnetic circuit were the key researched parts of the ferrite magnet. The integral design goal of the FT magnetic circuit is that DC bias magnetic field is 2000 Gs and alternating magnetic field is±400 Gs. In the FTT, E-type magnetic circuit was adopted. Ferrite material is Nd Fe B with a thickness of 30 mm by setting the working point of Nd Fe B, and the ampere turn of excitation coil is 25 through the theoretical calculation and simulation analysis. The coil inductance to generate alternating magnetic field is about 7 m H. Eddy-current effect has been analyzed, while the magnetic field distribution has been measured by a Hall probe in the medium plane of the biasing magnet. Finally, the test results show the good performance of the biasing magnet satisfying the design and operating requirements of the FFT.

主 题 词：EAST ICRF heating ferrite tuner biasing magnet 

学科分类：08[工学] 082701[082701] 0827[工学-食品科学与工程类] 

核心收录：

D　O　I：10.1088/2058-6272/aa8167

馆 藏 号：203263451...