Lee K D, Nam Y U, Seo Seong-Heon, Kim Y S
National Fusion Research Institute, Yuseong, Daejeon 305-333, South Korea.
Rev Sci Instrum. 2014 Nov;85(11):11D858. doi: 10.1063/1.4894000.
A Doppler reflectometer has been designed to measure the poloidal propagation velocity on the Korea Superconducting Tokamak Advanced Research (KSTAR) tokamak. It has the operating frequency range of V-band (50-75 GHz) and the monostatic antenna configuration with extraordinary mode (X-mode). The single sideband modulation with an intermediate frequency of 50 MHz is used for the heterodyne measurement with the 200 MHz in-phase and quadrature (I/Q) phase detector. The corrugated conical horn antenna is used to approximate the Gaussian beam propagation and it is installed together with the oversized rectangular waveguides in the vacuum vessel. The first commissioning test of the Doppler reflectometer system on the KSTAR tokamak is planned in the 2014 KSTAR experimental campaign.
已设计出一种多普勒反射仪，用于测量韩国超导托卡马克先进研究装置（KSTAR）托卡马克上的极向传播速度。它的工作频率范围为V波段（50 - 75吉赫兹），采用具有异常模式（X模式）的单基地天线配置。采用中频为50兆赫兹的单边带调制，通过200兆赫兹的同相和正交（I/Q）相位检测器进行外差测量。波纹锥形喇叭天线用于近似高斯光束传播，它与超大矩形波导一起安装在真空容器中。计划在2014年KSTAR实验活动中对KSTAR托卡马克上的多普勒反射仪系统进行首次调试测试。
