Department of Physics, East China University of Science and Technology,Shanghai 200237, China;
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China;
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China;
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China;
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China;
Department of Physics, Shanghai University, Shanghai 200436, China;
Department of Physics, East China University of Science and Technology,Shanghai 200237, China;