1. Institute for Plasma Science and Technology (ISTP), CNR 1 , Bari, Italy
2. Fusion and Technology for Nuclear Safety and Security Department (FSN), ENEA 2 , Frascati, Italy
3. Institute of Theoretical Electrical Engineering, Ruhr University Bochum 3 , Universitätsstraße 150, 44801 Bochum, Germany
4. LAPLACE, Université de Toulouse, CNRS, INPT, UPS 4 , Toulouse, France