1. Consorzio CREATE, c/o Università degli Studi di Napoli Federico II Dipartimento di Ingegneria Elettrica, Via Claudio 21, I-80125 Naples, Italy
2. Max Planck Institute für Plasmaphysik, ASDEX-Upgrade Postfach 1533, D-85740 Garching bei Miinchen, Germany
3. University College of Cork, Department of Physics College Road, Cork, Ireland