作者机构:[1]Sino-UNIted Spherical Tokamak Laboratory, Department of Engineering Physics, Tsinghua University, Beijing 100084, China
相关基金:supported by National Science Foundation of China (No. 10535020) and the Foundation for the Authors of National Excellent Doctoral Dissertation of China (No. 200456)Acknowledgements The authors would like to thank Mr. SUN Youwen for the help in the numerical calculation.