1. ENEA, Department of Fusion and Technology for Nuclear Safety and Security, I-00044 Frascati, Rome, Italy
2. CCFE, Culham Science Centre, Abingdon, Oxon OX14 3DB, United Kingdom
3. Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden
4. Reactor Physics Division, Jožef Stefan Institute, Jamova cesta 39, SI-1000 Ljubljana, Slovenia
5. Institute for Plasma Research, Bhat, Gandhinagar 382428, Gujarat, India
6. JET Exploitation Unit, Culham Science Centre, Abingdon, Oxon OX14 3DB, United Kingdom