1. Department of Plasma Physics and Fusion Engineering and CAS Key Laboratory of Geospace Environment, University of Science and Technology of China 1 , Hefei, Anhui 230026, China
2. Department of Modern Mechanics, University of Science and Technology of China 2 , Hefei 230026, China
3. Collaborative Innovation Center of IFSA, Shanghai Jiao Tong University 3 , Shanghai 200240, China