EAST离子回旋波加热快速阻抗匹配系统的研究

摘要

离子回旋波加热是EAST装置最重要的辅助加热方法,在实验中获得了明显的加热效果.射频功率源与天线负载之间阻抗匹配才能保证最大的加热功率输出.在射频加热实验中,等离子体参数的改变将会引起天线负载阻抗的快速变化,为应对这一情况研制出了快速阻抗匹配系统.本文采用解析法和计算机仿真相结合的分析方式,研制了该阻抗匹配系统的铁氧体匹配支节,并对其性能进行了测试.测试结果表明,快速阻抗匹配系统的时间响应速度明显优于传统匹配方式的,可作为实时匹配的候选者.%Ion cyclotron range of frequency (ICRF) heating is used in EAST Tokamak as one of the most significant auxiliary heating tools,and it shows a good performance.The antenna should be matched to radio frequency generator to ensure maximum power of heating.In the experiment of ICRF heating,variable plasma parameters will induce to fast vary loading impedance of antenna.The fast impedance matching system being fit for this situation was developed.By using analysis method and computer simulation,the ferrite tuner was developed and tested as the most important part of matching system.The test results show that good time response of the tuner is much faster than that of traditional method,and this can make it to be the candidate for real-time matching.