1. Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
2. University of Science and Technology of China, Hefei 230026, China
3. Huainan New Energy Research Center, Institute of Plasma Physics, Chinese Academy of Sciences, Huainan 232000, China
4. Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, Anhui, China