1. CCFE, Culham Science Centre, Abingdon OX14 3DB, United Kingdom
2. Institut für Energie- und Klimaforschung - Plasmaphysik, Forschungszentrum Jülich, 52425 Jülich, Germany
3. VTT, Association Euratom-Tekes, PO Box 1000, FI-02044 VTT, Finland
4. Alfvén Laboratory, School of Electrical Engineering, Royal Institute of Technology (KTH), Association EURATOM-VR, Stockholm, Sweden