1. Fusion Simulation Center and State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing, China
2. Lawrence Livermore National Laboratory, Livermore, California 94550, USA
3. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China
4. General Atomics, San Diego, California 92186, USA
5. WCI Center for Fusion Theory, NFRI, Daejeon, South Korea