S. Ishida     Naka Fusion Institute, Naka-shi, Ibaraki-Ken, Japan


JT-60 (JAERI Tokamak-60) started operating at the Naka Fusion Institute in 1985 as one of the world’s largest tokamaks with an outboard diverter configuration using hydrogen plasmas in Japan. Its modification to achieve higher plasma current with a single null open divertor was completed in 1991 (JT-60U, U = Upgrade), allowing it to use deuterium plasmas. Since then, JT-60U has addressed the physics issues of reactor plasmas, including ITER (International Thermonuclear Experimental Reactor) physics R&D (Research and Development), and has explored advanced tokamak regimes with high-βp and reversed shear modes for a commercially attractive fusion reactor—work which ...

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