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Neoclassical Transport Properties of Tokamak Plasmas
Fusion Science and Technology, 2004 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.
Weyssow, Boris, B. Weyssow
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Large orbit neoclassical transport
Physics of Plasmas, 1997Neoclassical transport in the presence of large ion orbits is investigated. The study is motivated by the recent experimental results that ion thermal transport levels in enhanced confinement tokamak plasmas fall below the “irreducible minimum level” predicted by standard neoclassical theory.
Z Lin, W M Tang, W W Lee
exaly +2 more sources
Development of a Non-Local Neoclassical Transport Code for Helical Configurations
Plasma and Fusion Research, 2008 The progress in a 3-dimensional, non-local neoclassical transport simulation code “FORTEC-3D” is described. The main purpose of the code is to solve the drift-kinetic equation in general a 3-dimensional configuration using the δf Monte Carlo method, and ...
Shinsuke Satake +2 more
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Impurity transport and neoclassical predictions
Plasma Physics and Controlled Fusion, 1991The authors present a brief review of collisional (classical and neoclassical) and anomalous transport. Particular emphasis is devoted to the question of charge independence of the anomalous transport coefficients and the combined action of anomalous and collisional transport.
Fussmann, G. +5 more
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Neoclassical Transport in the Helical Reversed-Field Pinch
Physical Review Letters, 2010Test particle evaluation of the diffusion coefficient in a fusion plasma in the reversed-field pinch (RFP) configuration shows distinct similarities with stellarators when the plasma spontaneously evolves towards a helical shape. The almost total absence of superbanana particles at the levels of helical deformation seen in experiment (Bh/B=10%) causes ...
Gobbin M, Spizzo G, Marrelli L, White R
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Internal Transport Barrier Triggered by Neoclassical Transport in W7-AS
Physical Review Letters, 2001Physical Review ...
U. Stroth +6 more
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Studies of the neoclassical transport for CNT
Plasma Physics and Controlled Fusion, 2007The original optimization of the Columbia Nonneutral Torus (CNT) considering only volume (and error field resilience) was also successful in optimizing the stored energy. To assess the general confinement properties of a device, studies of the 1/ν neoclassical transport (effective ripple eff) are important.
B Seiwald +3 more
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Thermodynamics of neoclassical and turbulent transport
Plasma Physics and Controlled Fusion, 2012A variational principle based on the calculation of the entropy production rate is derived, which covers particle, momentum and heat transport. This principle is used to define proper thermodynamical forces and fluxes. When turbulent parallel wavenumbers are small, and fluctuations are ballooned, it is found that the forces are the gradients of density,
Garbet X. +9 more
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Neoclassical ripple transport in tokamaks
Nuclear Fusion, 1982The usual ripple transport calculations lead to a ν−1 scaling of the transport coefficients with collision frequency ν. The paper extends and clarifies this scaling by taking into account the fact that the dominant contributions to transport come from particles in the high-energy tail of the distribution function.
K.C. Shaing, J.D. Callen
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