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11/09/2008
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A superconducting test coil for ITER, the next generation nuclear fusion reactor that many hope will open the way to almost limitless cheap, fairly clean power, has been tested successfully
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1.5m across and weighing 6 tons, the niobium titanium poloidal field coil reached a stable operation at 52,000A in a magnetic field of 6.4 Tesla. Poloidal coils will be used to maintain the plasma equilibrium and shape inside the ITER Tokomak reactor.
The 0.73mm niobium titanium strands were made in Russia, where they were bundled into a cable consisting of 1,440 strands. Europe assembled the cable into a steel jacket to make the final conductor and also wound it, insulated the turns and bonded them together to form the coil.
Japan was in charge of testing the coil at the JAEA site in Naka, with experts from the ITER Organisation, Europe, Japan, Russia and the United States. Nuclear fusion is the power source of the stars.
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Author
Tom Shelley
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