Design and Test of the Fast Ferrite Tuner for ICRF Heating in EAST
Design and Test of the Fast Ferrite Tuner for ICRF Heating in EAST
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DOI：
10.13182/fst61-301
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发表时间：
2012-05
影响因子：
0.9
通讯作者：
Gen Chen;Yan-ping Zhao;Y. Mao;S. Yuan;Gao Zheng;Fen Zheng;Z. He;Shenglin Yu
中科院分区：
文献类型：
--
作者：
Gen Chen;Yan-ping Zhao;Y. Mao;S. Yuan;Gao Zheng;Fen Zheng;Z. He;Shenglin Yu
摘要 离子回旋加速器频率范围（ICRF）加热作为托卡马克最成功的辅助加热工具之一，已在EAST中得到采用。为保证EAST ICRF加热系统的稳定运行，开展了快速铁氧体调谐器（FFT）的研发，旨在实现发射机与天线的实时阻抗匹配。 FFT 的设计和分析是一个迭代过程，必须考虑多个参数。 FFT 的尺寸应通过使用有限元方法和大量计算机模拟，在相对等效电长度和高功率性能之间进行折衷选择。第一个原型的目标是实现毫秒级的响应时间和 300 kW 的峰值功率，这将使我们了解这种铁氧体调谐器的射频和高功率性能。台架测试结果表明，调谐速度约200 ms的FFT比传统方法更快，可以成为EAST中ICRF加热系统实时阻抗匹配的候选方法之一。 FFT 的高功率性能应在 EAST 2012 春季活动中得到测试。为了适应ICRF加热实验的实时阻抗匹配，新原型机的开发正在进行中，其目标是响应时间为0.5 ms，插入损耗<1%，峰值功率为1.5 MW。
Abstract 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 EAST. To ensure the steady operation of the ICRF heating system in EAST, the research and development of the fast ferrite tuner (FFT), which aimed to achieve real-time impedance matching of transmitter to antenna, has been carried out. The design and analysis of the FFT is an iterative process where multiple parameters have to be taken into account. The dimensions of the FFT should be chosen as a compromise between relative equivalent electrical length and high-power performance by using the finite element method and numerous computer simulations. The first prototype aimed at achieving a response time of milliseconds and operation with a peak power of 300 kW, which will inform us about the radio-frequency and the high-power performance of such a ferrite tuner. The bench test results have demonstrated that the FFT with a tuning speed of [approximately]200 ms is faster than the traditional methods, and it can be one of the candidates for the real-time impedance matching of the ICRF heating system in EAST. The high-power performance of the FFT should be tested in the EAST 2012 spring campaign. To be fit for the real-time impedance matching for ICRF heating experiments, development of a new prototype, which aims at a response time of 0.5 ms, an insertion loss of <1%, and operation with a peak power of 1.5 MW, is in progress.