Tokamak geometry (IMAGE) National Research Council of Science & Technology Caption Plasma configuration of a FIRE mode in Korea Superconducting Tokamak Advanced Research(KSTAR). The colour of lines indicates the ion temperature in keV, where 10 keV corresponds to ~120 million Kelvin. Credit Korea Institute of Fusion Energy (KFE) Usage Restrictions The sources of photos and research results from the KFE must be specified. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.