Development of High-power Wide-band RF Transmitter on EAST
Development of High-power Wide-band RF Transmitter on EAST
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DOI：
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发表时间：
2013
影响因子：
1.3
通讯作者：
Qin Chengming
中科院分区：
文献类型：
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作者：
Qin Chengming
EAST的离子回旋加速器（ICRF）加热系统是目前最成功的等离子体辅助加热设备之一，射频发射机作为ICRF系统的主要子系统，对提高等离子体的性能起着重要作用。本文在对电路进行分析的基础上，根据传输线和波导腔的理论，对放大器的输入、输出电路进行了研究，介绍了放大器之间的阻抗匹配、寄生振荡的抑制和放大器腔体的冷却等技术。在射频发射机的测试中，在匹配的虚拟负载上，每个放大器都获得了1.5 MW的射频功率。射频发射机在EAST上稳定可靠地工作，并在EAST ICRF加热实验中得到了验证。
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.