1. Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics; Dalian University of Technology; Dalian PR China
2. Institut für Energie- und Klimaforschung - Plasmaphysik, Forschungszentrum Jülich; Association EURATOM-FZJ, Trilateral Euregio Cluster; Jülich Germany