EAST四条带ICRF天线的三维电磁场分析  

Three dimensional electromagnetic analysis of the four strap ICRF antenna for EAST

作　　者：杨桦[1] 吴丛凤[1] 董赛[1] 张新军[2] 赵燕平[2] 尚雷[1] 

机构地区：[1]中国科学技术大学国家同步辐射实验室,合肥230029 [2]中国科学院等离子体物理研究所,合肥230031

出　　处：《核聚变与等离子体物理》2015年第3期233-239,共7页Nuclear Fusion and Plasma Physics

基　　金：国家磁约束核聚变能发展研究专项(2010GB110000)

摘　　要：采用3维电磁场代码CST MWS对EAST 4条带的离子回旋(ICRF)天线性能进行模拟研究,分析了天线的耦合阻抗随频率的变化,计算了电流和波谱的分布,模拟研究了不同电流相位对天线的电压击穿打火和引入杂质的影响。计算结果表明:此EAST的ICRF天线耦合阻抗和波谱总体设计合理;但天线局部电场较高,当环向电流条带为(0,0,0,0)相位时Emax为3.61MV.m-1超出击穿阈值,经过结构尺寸的优化后Emax低于阈值。同时表明天线运行时限制器处有较高的RF电势,当电流相位为(0,π,π,0)时法拉第屏前10mm处的RF电势是(0,0,π,π)相位时的1/3。The performance of the four strap ion cyclotron range of frequency （ICRF） antenna in EAST was studied by three dimensional electromagnetic code CST MWS. The coupling impedance with various frequencies, the distribution of current on straps and the power spectra for the three types of phases were calculated. The voltage breakdown and ICRF-related impurity were also studied. Simulation results show that the coupling impedance and power spectrum of the antenna design were reasonable, however, highest electric field, which is 3.61MV.m-1 for （0, 0, 0, 0） toroidal phasing at the local area, exceeds the empirical value of breakdown. After the structure size was optimized, the maximum of E-field was below the breakdown value, the results also show that the high radio frequency （RF） potential was close to the antenna limiter, the RF potential along total B-field in front of Faraday screens 10mm for （0,π,π, 0） phasing was one-third of that for （0, 0,π,π） phasing.

关 键 词：离子回旋天线 电磁场 EAST CSTMWS代码 

分 类 号：TL624[核科学技术—核技术及应用]