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Abstract

The neoclassical ion transport in tokamak plasma with circular cross section is studied with guiding centre particle simulations. A Monte Carlo model of pitch-angle scattering, which includes momentum conservation, is employed. The model includes the whole plasma inside closed flux surfaces, but the focus is on the near-axis transport due to particles with wide orbits, which lead to a different heat flux than in the standard theory. Neither of two recent theories of banana regime transport near the axis is confirmed by the simulations, nor do the numerical results for the plateau regime agree with a recent theory of wide-orbit transport in this regime.

Additional information

Authors: BERGMANN A, Max-Planck-Institut fur Plasmaphysik, IPP-EURATOM Association, Garching (DE);PEETERS A G, Max-Planck-Institut fur Plasmaphysik, IPP-EURATOM Association, Garching (DE);PINCHES S D, Max-Planck-Institut fur Plasmaphysik, IPP-EURATOM Association, Garching (DE)
Bibliographic Reference: An article published in:Physics of Plasmas, 8 (12), (2001), pp. 5192-5198
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