1. Forschungszentrum Jülich, EURATOM Association, Jülich, D-52425, Germany
2. Nuclear Fuel Plant, Pitesti, Romania
3. Max-Planck-Institut für Plasmaphysik, EURATOM Association, D-85748 Garching, Germany
4. dForschungszentrum Jülich, EURATOM Association, D-52425 Jülich, Germany; Presently at ITER Organization Route de Vinon sur Verdon, F-13115 St Paul Lez Durance, France
5. National Institute for Laser, Plasma and Radiation Physics, Association EURATOM-MEdC, Bucharest, Romania
6. EURATOM-CCFE Fusion Association, Culham Science Centre, Abingdon OX14 3DB, United Kingdom
7. Alfvén Laboratory, Royal Institute of Technology (KTH), Association EURATOM-VR, 10044, Stockholm, Sweden
8. hSCK CEN, Belgian Nuclear Research Centre, Boeretang 200, B-2400 Mol, Belgium