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The diffusive heat transport is considered numerically taking into account magnetic field line stochasticity in the ergodic divertor configuration on Tore Supra. In the 3D non-linear simulations the transport coefficients can have a non-linear dependence on the temperature: Spitzer for parallel and Bohm-like for transverse heat conductivities. The simulations reproduce the main experimental features of tile temperature field with ergodic divertor: flattening of the averaged temperature profile in ergodic zone, steep gradient near separatrix and small radial modulations, which exhibit the same angle periodicity as the edge resonant harmonics (q = m/n) of the ergodic divertor spectrum.

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Authors: BECOULET M ET AL, Association EURATOM-CEA, CE Cadarache, DRFC, F-13108 St. Paul-lez-Durance (FR)
Bibliographic Reference: Article: Contribution to Plasma Physics, vol. 40 (2000) No 3-4, pp. 251-255
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