Neoclassical ion thermal conductivity modified by finite banana effects in a tokamak plasma

Journal Article · Sun Jun 01 00:00:00 EDT 1997 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.872387· OSTI ID:503657

Chang, C S ^[1]

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1. Courant Institute of Mathematical Sciences, New York University, New York, New York 10012 (United States)

A finite-banana-width correction to the neoclassical ion thermal conductivity is obtained in a tokamak plasma under the conventional assumption that the particle flow parallel to magnetic-field lines dominates the trapped particle{close_quote}s orbital dynamics. It is found that the finite-banana-width effect makes ion thermal conductivity itself be a function of radial plasma density gradient and magnetic shear. Negative radial gradients in plasma density and/or safety factor can reduce the neoclassical ion thermal conductivity when the banana width is a significant fraction of the gradient scale length. {copyright} {ital 1997 American Institute of Physics.}

• DOE Contract Number: FG02-86ER53223
• OSTI ID: 503657
• Journal Information: Physics of Plasmas, Vol. 4, Issue 6; Other Information: PBD: Jun 1997
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION
TOKAMAK DEVICES
THERMAL CONDUCTIVITY
IONIC CONDUCTIVITY
PLASMA DENSITY
DYNAMICS
TRAPS