1. College of Physics, Sichuan University, Chengdu 610065, P. R. China
2. National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang, Sichuan 621900, P. R. China
3. HEDPS, Center for Applied Physics and Technology, College of Engineering, Peking University, Beijing 100871, P. R. China