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Confirmation of the topology of the Wendelstein 7-X magnetic field to better than 1:100,000

Author

Listed:
  • T. Sunn Pedersen

    (Max Planck Institute for Plasma Physics
    University of Greifswald)

  • M. Otte

    (Max Planck Institute for Plasma Physics)

  • S. Lazerson

    (Princeton Plasma Physics Laboratory)

  • P. Helander

    (Max Planck Institute for Plasma Physics
    University of Greifswald)

  • S. Bozhenkov

    (Max Planck Institute for Plasma Physics)

  • C. Biedermann

    (Max Planck Institute for Plasma Physics)

  • T. Klinger

    (Max Planck Institute for Plasma Physics
    University of Greifswald)

  • R. C. Wolf

    (Max Planck Institute for Plasma Physics
    Technical University Berlin)

  • H. -S. Bosch

    (Max Planck Institute for Plasma Physics
    Technical University Berlin)

Abstract

Fusion energy research has in the past 40 years focused primarily on the tokamak concept, but recent advances in plasma theory and computational power have led to renewed interest in stellarators. The largest and most sophisticated stellarator in the world, Wendelstein 7-X (W7-X), has just started operation, with the aim to show that the earlier weaknesses of this concept have been addressed successfully, and that the intrinsic advantages of the concept persist, also at plasma parameters approaching those of a future fusion power plant. Here we show the first physics results, obtained before plasma operation: that the carefully tailored topology of nested magnetic surfaces needed for good confinement is realized, and that the measured deviations are smaller than one part in 100,000. This is a significant step forward in stellarator research, since it shows that the complicated and delicate magnetic topology can be created and verified with the required accuracy.

Suggested Citation

  • T. Sunn Pedersen & M. Otte & S. Lazerson & P. Helander & S. Bozhenkov & C. Biedermann & T. Klinger & R. C. Wolf & H. -S. Bosch, 2016. "Confirmation of the topology of the Wendelstein 7-X magnetic field to better than 1:100,000," Nature Communications, Nature, vol. 7(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms13493
    DOI: 10.1038/ncomms13493
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