S Korean fusion reactor sustains plasma for record 70 sec
The Korean Superconducting Tokamak Advanced Research nuclear fusion reactor in South Korea has sustained high performance plasma in a stable state for 70 seconds, the longest ever recorded time for this type of reaction. The reactor used superconducting magnets cooled to -269°C to maintain plasma at temperatures up to 300 million°C, nearly 20 times that in the Sun's core.