1. FOM Institute for Plasma Physics Rijnhuizen, Association Euratom-FOM, Partner in the Trilateral Euregio Cluster Nieuwegein, Netherlands
2. Princeton Plasma Physics Laboratory, Princeton, New Jersey, U.S.A
3. University of California at Davis, Dept. of Applied Science, Davis, California, U.S.A
4. Forschungszentrum Jülich, Institut für Plasmaphysik, Association EURATOM-FZJ, Partner in the Trilateral Euregio Cluster, D-52425 Jülich,Germany