1. HEDPS, Center for Applied Physics and Technology, and School of Physics, Peking University, Beijing 100871, China
2. Department of Applied Physics, School of Physics and Electronics, Hunan University, Changsha 410082, China
3. HEDPS, Center for Applied Physics and Technology, and College of Engineering, Peking University, Beijing 100871, China
4. Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
5. Graduate School, China Academy of Engineering Physics, Beijing 100193, China
6. China Academy of Engineering Physics, Mianyang 621900, China