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JT-60 (JT stands for Japan Torus) is the flagship of Japan's magnetic fusion program, run by the Japan Atomic Energy Research Institute (JAERI), Naka Fusion Research Establishment, in Ibaraki Prefecture, Japan. It is currently the world's most powerful fusion reactor, producing fusion power in excess of 50 MW, with the ion temperature reaching above 520 million K. JT-60 is a typical Tokamak with a D-shaped poloidal cross-section, similar to JET.