Phys.org  May 30, 2023 An international team of researchers (Ireland, USA – Princeton Plasma Physics Laboratory, Oak Ridge National Laboratory, Germany) has produced ion temperatures of over 100 million degrees Kelvin (8.6 keV) in the ST40 compact high-field spherical tokamak (ST). Ion temperatures more than 5 keV have not previously been reached in any ST and have only been obtained in much larger devices with substantially more plasma heating power. The corresponding fusion triple product was calculated. These results demonstrated for the first time that ion temperatures relevant for commercial magnetic confinement fusion can be obtained in a compact high-field […]