Wang S J, Kwak J G, Hwang C K
Korea Atomic Energy Research Institute, Daejeon 305-353, Korea.
Rev Sci Instrum. 2009 Feb;80(2):023501. doi: 10.1063/1.3077281.
An ion cyclotron range of frequency system requires rf diagnostics for a rf-plasma coupling or for maintaining a correct operation. A detector based on a digital I/Q demodulation technique collects the rf amplitude and phase at the same time without errors from the I/Q imbalance inherent in an analog counterpart. The theory of such a detector was studied and implemented for the first campaign of the KSTAR tokamak. Experimental results of the rf and other diagnostics are presented and discussed.
离子回旋频率范围系统需要射频诊断来实现射频等离子体耦合或维持正确运行。基于数字I/Q解调技术的探测器可同时采集射频幅度和相位，且不存在模拟探测器固有的I/Q失衡误差。针对韩国超导托卡马克先进研究装置（KSTAR）托卡马克的首次运行，对这种探测器的理论进行了研究并付诸实践。文中给出并讨论了射频及其他诊断的实验结果。
