1. CAS Key Laboratory of Geospace Environment Department of Geophysics and Planetary Sciences University of Science and Technology of China Hefei China
2. CAS Center for Excellence in Comparative Planetology Hefei China
3. Center for Nonlinear Plasma Science and C.R. ENEA Frascati Frascati Italy
4. Institute of Fusion Theory and Simulation and School of Physics Zhejiang University Hangzhou China
5. Department of Physics and Astronomy University of California Irvine CA USA