1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
2. Advanced Energy Research Center, Shenzhen University, Shenzhen 518060, China
3. School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China
4. School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230026, China