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Drift-Kinetic Simulations of Neoclassical Transport
AIP Conference Proceedings, 2008We present results from numerical studies of neoclassical transport for multi‐species plasmas. The code, NEO, provides a first‐principles based calculation of the neoclassical transport coefficients directly from solution of the distribution function by solving a hierarchy of equations derived by expanding the fundamental drift‐kinetic equation in ...
E. A. Belli +4 more
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Neoclassical Transport In The Stellarator And Heliotron
1998Abstract In neoclassical diffusion theory, the essential mechanism is the existence of a trapped particle with a velocity component perpendicular to the magnetic surfaces due to VB drift motion. From this point of view, neoclassical diffusion exists even in straight stellarators with perfect helical symmetry.
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On the relation between neoclassical transport and turbulent transport
Physics of Plasmas, 2005It is demonstrated through the flux-force relationship in the neoclassical theory that when neoclassical transport fluxes are improved, the damping rate of the radial electric field of the zonal flow is reduced. This, in turn, leads to improved turbulent transport fluxes.
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Neoclassical transport in a rotating impure plasma
Physics of Plasmas, 1998In a toroidally rotating tokamak plasma, heavy impurity ions accumulate on the outside of each flux surface under the action of the centrifugal force. The collision frequency therefore varies over the flux surface. This circumstance is shown to enhance the neoclassical transport processes, including the bootstrap current, by making collisions occur ...
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On neoclassical transport near the magnetic axis
Physics of Plasmas, 2000The theory of neoclassical transport near the magnetic axis in a tokamak is discussed. It is shown that the ordinary treatment of transport in the plateau regime holds in most of the region within a trapped orbit width of the magnetic axis, and is not modified by “potato” orbits.
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Neoclassical bootstrap current and transport in optimized stellarator configurations
Physics of Fluids B, 1993Nührenberg J, Maassberg H
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Neoclassical Transport Modeling Compatible with a Two-Fluid Transport Equation System
Plasma and Fusion Research, 2011Atsushi Fukuyama +2 more
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Neoclassical and anomalous transport in axisymmetric toroidal plasmas with electrostatic turbulence
Physics of Plasmas, 1995Horton W, Sugama H
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