Nonlinear dynamics of multiple neoclassical tearing modes in tokamaks
- 1. Institute for Plasma Research, Bhat, Gandhinagar 382428 (India)
- 2. France-Japan Magnetic Fusion Lab, LIA 336, CNRS/Lab PIIM, UMR 6633, CNRS-Universite de Provence, 13397 Marseille (France)
- 3. Association Euratom-CEA, DRFC, CEA Cadarache, 13108 St-Paul-Lez-Durance (France)
Description
Numerical simulations investigating the interaction of co-existent 2/1 and 3/1 neoclassical tearing modes are presented. The results obtained from an initial value 3D toroidal code that solves a set of generalized reduced MHD equations exhibit a host of complex phenomena arising from the coupling of the two modes. These include a modification of the island saturation widths of the two modes, a significant modification in the perpendicular flow patterns in the vicinity of the islands, and the excitation of geodesic acoustic mode like oscillations that lead to concomitant oscillations in the kinetic and magnetic energies of the islands. These oscillations only occur in the presence of the neoclassical stress tensor contribution and are absent for two coupled classical tearing modes.
Additional details
Identifiers
- DOI
- 10.1063/1.4799823;
Publishing Information
- Journal Title
- Physics of Plasmas
- Journal Volume
- 20
- Journal Issue
- 4
- Journal Page Range
- p. 042505-042505.8
- ISSN
- 1070-664X
- CODEN
- PHPAEN
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 44085570
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY; S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
- Descriptors DEI
- COMPUTERIZED SIMULATION; EQUATIONS; EXCITATION; ION ACOUSTIC WAVES; MAGNETOHYDRODYNAMICS; MODIFICATIONS; NEOCLASSICAL TRANSPORT THEORY; NONLINEAR PROBLEMS; NUMERICAL ANALYSIS; OSCILLATIONS; PLASMA CONFINEMENT; TEARING INSTABILITY; THREE-DIMENSIONAL CALCULATIONS; TOKAMAK DEVICES
- Descriptors DEC
- CHARGED-PARTICLE TRANSPORT THEORY; CLOSED PLASMA DEVICES; CONFINEMENT; ENERGY-LEVEL TRANSITIONS; FLUID MECHANICS; HYDRODYNAMICS; INSTABILITY; ION WAVES; MATHEMATICS; MECHANICS; PLASMA INSTABILITY; PLASMA MACROINSTABILITIES; PLASMA WAVES; SIMULATION; THERMONUCLEAR DEVICES; TRANSPORT THEORY
Optional Information
- Notes
- (c) 2013 American Institute of Physics