[1] Max Planck Inst Plasmaphys, EFDA, D-85748 Garching, Germany
[2] Max Planck Inst Plasmaphys, ITER Garching Joint Work Site, D-85748 Garching, Germany
[3] Argonne Natl Lab, Fus Power Program, Tecnol Dev Div, Argonne, IL 60439 USA
[4] Japan Atom Energy Res Inst, Dept Fus Engn Res, Naka, Ibaraki 3110193, Japan
[5] RDIPE ENTEK, Res & Dev Inst Power Engn, Moscow 107140, Russia