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The topology of stochastic magnetic fields in the edge region of Wendelstein 7-X (W7-X) is investigated. The Kolmogorov lengths to the plasma-facing components. It is shown that the mean Kolmogorov length decreases with increasing beta, and that stochastic layers exist in the considered cases. The field line diffusion coefficient in dependancy of the Kolmogorov length is estimated from the radial displacements of flux tubes and the corresponding heat diffusion coefficients are also given.

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Authors: STRUMBERGER E, Max-Planck-Institut fur Plasmaphysik, Garching bei Munchen (DE)
Bibliographic Reference: Article: Journal of Nuclear Materials, 266-269 (1999), 1207-1211
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