Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;
Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;
Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;
Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;
Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;
Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;
poloidal rotation; main ions; Doppler shift;