1. CEA, IRFM, F-13108 Saint Paul Lez Durance, France
2. IJL UMR 7198 CNRS, Université de Lorraine, F-54000 Nancy, France
3. Department of Applied Physics, Ghent University, 9000 Gent, Belgium
4. EUROfusion Programme Management Unit, Culham Science Centre, Culham OX14 3DB, United Kingdom
5. LPP-ERM/KMS, B-1000 Brussels, Belgium