[1] CEA, IRFM, F-13108 St Paul Les Durance, France
[2] Assoc EURATOM ENEA Fus, CR Frascati, Rome, Italy
[3] Ecole Polytech, CPT, F-91128 Palaiseau, France
[4] Univ Sci & Technol, INRIA CNRS, UMR5800, UMR5466, Bordeaux, France
[5] INRIA Sophia Antipolis, F-06902 Sophia Antipolis, France
[6] Assoc EURATOM IPP CR, IPP, Prague 18221, Czech Republic
[7] Univ Strasbourg, IRMA, Strasbourg, France
[8] Univ Aix Marseille 1, CNRS, IUSTI, Marseille, France
[9] Univ Lyon, Ecole Cent Lyon, Lab Ampere, CNRS,UMR 5005, Ecully, France
[10] Univ Nice, LJAD, CNRS, UMR 6621, Sophia, Antipolis, France
[11] Ecole Normale Super, CNRS, LMD, Paris, France
[12] Univ Henri Poincare, LPMIA, CNRS, UMR 7040, Paris, France
[13] Ecole Polytech, LPTP, F-91128 Palaiseau, France
[14] EURATOM, Max Planck Inst Plasmaphys, D-85748 Garching, Germany
[15] Moscow Phys & Engn Inst MEPhI, Moscow 115409, Russia
[16] Dublin City Univ, Sch Phys Sci, Glasnevin 9, Ei Dublin, Ireland
[17] Univ Aix Marseille 1, CNRS, UMR 6633, Marseille, France
[18] Univ Paul Cezanne, CNRS, MSNM GP, UMR 6181, Marseille, France