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Home / Publications / Journals / Fusion Science and Technology / Volume 53 / Number 2T

Neoclassical Transport Properties of Tokamak Plasmas

B. Weyssow

Fusion Science and Technology / Volume 53 / Number 2T / February 2008 / Pages 314-321

Technical Paper / Transport Theory /

The classical transport theory is strictly valid for a plasma in a homogeneous and stationary magnetic field. In the '60, experiments have shown that this theory does not apply as a local theory of transport in Tokamaks. It was shown that global geometric characteristics of the confining elements have a strong influence on the transport. Three regimes of collisionality are characteristic of the neoclassical transport theory: the banana regime (the electronic diffusion coefficient increases starting from zero), the plateau regime (the diffusion coefficient is almost independent of the collisionality) and the Pfirsch-Schl├╝ter regime (the electronic diffusion coefficient again increases with collisionality).

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