Nuclear Physics and Atomic Energy

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Nuclear Physics and Atomic Energy

  ISSN: 1818-331X (Print), 2074-0565 (Online)
  Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine
  Languages: Ukrainian, English
  Periodicity: 4 times per year

  Open access peer reviewed journal

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Nucl. Phys. At. Energy 2001, volume 2, issue 4, pages 119-125.
Section: Plasma Physics.
Published online: 30.12.2001.
PDF Full text (en)
https://doi.org/10.15407/jnpae2001.04.119

Energy confinement in W7-AS and extrapolation to a Helias reactor

H. Wobig1, SSS-Group

1Max-Planck Institut für Plasmaphysik, IPP-EURATOM Association, Garching bei München, Germany

Abstract: The energy confinement time in Wendelstein 7-AS shows a strong dependence on the rotational transform, which makes it difficult to establish a universal scaling laws for energy confinement. Under optimum conditions the scaling of confinement follows Lackner-Gottardi scaling with an improvement factor of 1.2. This holds in the very neighbourhood of low order rational surfaces (ι = 0.34 and ι = 0.52). The scaling law together with other ones published in the literature are applied to the Helias reactor HSR4/18 (R = 18 m, a = 2 m, B = 5 T) showing that the conditions of self-sustained burn can be satisfied. In a second part the one-dimensional heat conduction equation is solved for the temperature profile taking into account alpha-particle heating and bremsstrahlung losses. The non-linearity of the equation leads to multiple solutions, the scaling of the stable solution is studied in detail.

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