Formation of tripolar vortices in toroidal ion-temperature-gradient driven modes in the presence of dust contamination
- Theoretical Plasma Physics Group, Department of Physics, Quaid-i-Azam University, Islamabad 45320 (Pakistan)
A system of nonlinear equations that governs the dynamics of toroidal-ion-temperature-gradient (TITG) driven modes in the presence of dust contamination is presented. In the linear limit, a local dispersion relation is derived and analyzed for a flat density profile case. In the nonlinear case, and by taking some specific profiles of equilibrium density, ion temperature, magnetic field, and sheared plasma flows, the stationary solutions of the nonlinear system can be represented in the form of a tripolar vortex solution. Numerical results obtained in the present study show that the inclusion of dust modifies the nonlinear vortical structures, and the amplitude of the normalized potential is found to be increased in the presence of negatively charged dust grains. The results of our present investigation would be useful to understand some linear as well as nonlinear properties of TITG modes in a dust-contaminated tokamak plasma.
- OSTI ID:
- 21072656
- Journal Information:
- Physics of Plasmas, Vol. 14, Issue 8; Other Information: DOI: 10.1063/1.2753465; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
AMPLITUDES
DISPERSION RELATIONS
DUSTS
ELECTRON TEMPERATURE
ION DENSITY
ION TEMPERATURE
MAGNETIC FIELDS
MATHEMATICAL SOLUTIONS
NONLINEAR PROBLEMS
PLASMA
PLASMA CONFINEMENT
PLASMA DENSITY
PLASMA INSTABILITY
POTENTIALS
SHEAR
TEMPERATURE GRADIENTS
TOKAMAK DEVICES
VORTICES