1. FOM-Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM, Trilateral Euregio Cluster, Nieuwegein, The Netherlands
2. Dept. of Applied Physics, UC Davis, USA
3. Institut für Energieforschung - Plasmaphysik, Forschungszentrum Jülich, Association EURATOM-FZJ, Trilateral Euregio Cluster, 52425 Jülich, Germany
4. National Technical University of Athens, Association Euratom-Hellenic Republic, Greece
5. Princeton Plasma Physics Laboratory, Princeton, New Jersey, USA