[1] Max Planck Inst Plasma Phys, D-17491 Greifswald, Germany
[2] Leonard Vinci Pole Univ, Res Ctr, F-92916 Paris, France
[3] Max Planck Inst Plasma Phys, D-85748 Garching, Germany
[4] ENEA C R Frascati, I-00044 Frascati, Italy
[5] IRFM, CEA, F-13108 Durance, France
[6] Inst Super Tecn, IPFN, P-1049001 Lisbon, Portugal
[7] Ecole Polytech Fed Lausanne, Swiss Plasma Ctr, CH-1015 Lausanne, Switzerland
[8] Ecole Polytech Fed Lausanne, SCITAS, CH-1015 Lausanne, Switzerland
[9] CNRS CPhT IP Paris, F-91128 Palaiseau, France
[10] Univ Warwick, Coventry CV4 7AL, England
[11] Univ Lorraine, Inst Jean Lamour, UMR 7198, CNRS, Nancy, France
[12] Natl Inst Nat Sci NINS, IRCC, Tokyo 1818588, Japan