1. VTT Technical Research Centre of Finland 1 , FI-02044 VTT, Finland
2. University of Helsinki 2 , FI-00014 Helsinki, Finland
3. École Polytechnique Fédérale de Lausanne, Swiss Plasma Center 3 , CH-1015 Lausanne, Switzerland
4. Eindhoven University of Technology, Mathematics and Computer Science 4 , NL-5600MB Eindhoven, The Netherlands
5. Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik 5 , DE-52425 Jülich, Germany
6. Division of Fusion Plasma Physics, KTH Royal Institute of Technology 6 , SE-100 44 Stockholm, Sweden
7. Max-Planck-Institut für Plasmaphysik 7 , D-85748 Garching, Germany