1. CAS Key Laboratory of Geospace Environment and Department of Engineering and Applied Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
2. Lawrence Livermore National Laboratory, Livermore, California 94550, USA
3. Key Laboratory of Materials Modification by Laser, Electron, and Ion Beams (Ministry of Education), and School of Physics, Dalian University of Technology, Dalian 116024, People's Republic of China
4. Department of Physics, East China University of Science and Technology, Shanghai 200237, China