1. Istituto di Fisica del Plasma, EURATOM-ENEA-CNR Association, Milano, Italy
2. CRPP, EURATOM-Confédération Suisse, EPFL, CH-1015, Lausanne, Switzerland
3. Max-Planck-Institut für Plasmaphysik, D-85748 Garching, Germany
4. European Fusion Development Agreement, Close Support Unit, Boltzmannstrasse 2, D-85748 Garching, Germany