1. UKAEA/CCFE, Culham Science Centre, Abingdon, Oxon OX14 3DB, United Kingdom
2. Department of Applied Physics, Aalto University School of Science, P.O. Box 11100, FI-00076 Aalto, Finland
3. Max-Planck-Institut für Plasmaphysik, 85748 Garching, Germany
4. Department of Physics, York Plasma Institute, University of York, Heslington, York, United Kingdom
5. Forschungszentrum Jülich GmbH, Institut für Energie-und Klimaforschung - Plasmaphysik, 52425 Jülich, Germany
6. Max-Planck-Institut für Plasmaphysik, Greifswald, Germany