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EAST装置高功率宽带射频发射机系统研制

Development of High-power Wide-band RF Transmitter on EAST

    摘要
  • 摘要: 离子回旋波加热系统是EAST装置最重要的辅助加热工具，作为系统最核心的分系统之一，高功率射频发射机为加热等离子体提供射频波能量，对提高等离子体运行参数起着极为重要的作用。基于电路分析、传输线和波导谐振腔等相关工程理论，本文系统地总结了射频发射机系统高功率放大器输入输出回路、放大器级间匹配、寄生振荡抑制、腔体冷却等部分的设计原理和实现方法。在假负载上进行了系统测试，在设计频段内获得了1.5 MW的射频输出功率，测试结果表明系统达到了设计的技术指标。通过两轮EAST射频加热实验验证，发射机系统运行稳定可靠，满足射频加热等相关物理实验要求。

     

    Abstract: Ion cyclotron range of frequency (ICRF) heating system in EAST is one of the most successful auxiliary heating tools for heating plasmas. Radio frequency (RF) transmitter plays an important role for improving performances of plasmas by using RF wave as a main subsystem of ICRF system. Based on the analysis of electric circuit and theory of transmission line and waveguide cavity, studies on input and output circuit of amplifier, impedance matching between the amplifiers, suppression of the parasitic oscillations and cooling of amplifier cavity were presented. A RF power of 1.5 MW for each was achieved in a matched dummy load during tests of RF transmitters. The RF transmitters operate stably and reliably on EAST and are proved to be competent in EAST ICRF heating experiments.

     

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