EAST 2MW/2450MHz低杂波电流驱动系统综述  

A 2450MHz/2MW Lower Hybrid Current Drive System For EAST

作　　者：赵连敏[1] 单家方[1] 刘甫坤[1] 贾华[1] 王茂[1] 刘亮[1] 王晓洁[1] 徐旵东[1] 张长虹[1] 李军[1] 低杂波电流驱动小组 

机构地区：[1]中国科学院等离子体物理研究所,安徽合肥230031

出　　处：《核电子学与探测技术》2009年第5期1143-1148,共6页Nuclear Electronics & Detection Technology

基　　金：中国科学院知识创新工程青年人才领域专项前沿项目(075FCQ0127);国家自然科学基金项目(10575104和10805057)资助

摘　　要：为了研究全超导托卡马克稳态高参数等离子体性能，2008年在EAST装置上研制并成功建成了一套最大能传输2兆瓦，工作频率是2450MHz的低混杂波电流驱动系统。该系统主要由20个速调管放大器、4套高压源、20路每路30-40米长的WR430标准矩形波导传输线和多结波导天线阵列组成。辐射波谱的控制是通过子波导内的固定移相器和微波前级的数字可调移相器两种移相手段来实现。在低杂波系统的辅助下成功实现了：驱动中心密度为1～2×10^13cm^-3下150-500kA的等离子体，全波驱动250kA电流达23s和低杂波辅助启动实验，所有的这些实验都证明了整个低杂波系统的稳定和可靠性。详细描述了整个系统的构成和初步的实验结果。In order to investigate and study the steady-state operation with high plasma performance on the fully superconducting tokarnak, a lower hybrid current drive （LHCD） system has been successfully installed on EAST （Experimental Advanced Superconducting Tokamak） in 2008. The system is designed to launch 2 MW of RF power, at a frequency of 2.45 GHz. The main components are 20 CW klystron amplifiers fed by 4 sets of high voltage power supplies, 20 standard rectangle waveguide （WR430） transmission lines about length of 30-40m each, and a muhi-junction grill. Two kinds of phase shifters were used to control the radiated power spectrum, one is the fixed phase shifter in each subwaveguide and the other is the electronically-controlled digital phase shifter in the input circuit prior to each Idystron. Some experiments have been done with a plasma density of 1-2×10^13 cm^-3 with 150-500 kA of plasma current. A full non-inductive plasma current up to 23 S has been achieved by the means of LHCD, that successfully indicate the reliability of LHCD technology.

关 键 词：低杂波电流驱动系统 相控多结波导阵 高功率稳态运行 

分 类 号：TL612.11[核科学技术—核技术及应用]