KU Long-Poe | Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543-0451, USA

National Institute for Fusion Science

Princeton Plasma Physics Laboratory

Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA

Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6169, USA

Princeton Plasma Physics Laboratory, Princeton University

Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6169, USA

Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543-0451, USA

Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543-0451, USA

National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan