Effects of Broken Symmetry in Tokamaks: Global Braking of Toroidal Rotation and Self-consistent Determination of Neoclassical Magnetic Islands Velocity

Journal Article · Thu Oct 08 00:00:00 EDT 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3253964· OSTI ID:21322945

Lazzaro, Enzo ^[1]

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1. Istituto di Fisica del Plasma, D.E.T.-C.N.R., EUR-ENEA-CNR Association, Milan (Italy)

Established results of neoclassical kinetic theory are used in a fluid model to show that in low collisionality regimes ({nu} and 1/{nu}) the propagation velocity of Neoclassical Tearing Modes (NTM) magnetic islands of sufficient width is determined self-consistently by the Neoclassical Toroidal Viscosity (NTV) appearing because of broken symmetry. The NTV effect on bulk plasma rotation, may also explain recent observations on momentum transport. At the same time this affects the role of the neoclassical ion polarization current on neoclassical tearing modes (NTM) stability.

• OSTI ID: 21322945
• Journal Information: AIP Conference Proceedings, Vol. 1177, Issue 1; Conference: Workshop on from Leonardo to ITER: Nonlinear and coherence aspects, Goeteborg (Sweden), 18-19 May 2009; Other Information: DOI: 10.1063/1.3253964; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
IONS
MAGNETIC ISLANDS
NEOCLASSICAL TRANSPORT THEORY
PLASMA
PLASMA FLUID EQUATIONS
POLARIZATION
ROTATION
STABILITY
SYMMETRY BREAKING
TEARING INSTABILITY
TOKAMAK DEVICES
VISCOSITY