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Oscillation regimes of the internal kink mode in tokamak plasmas
- Source :
- Plasma Physics and Controlled Fusion, Plasma Physics and Controlled Fusion, IOP Publishing, 2011, 53 (1), pp.015011. ⟨10.1088/0741-3335/53/1/015011⟩
- Publication Year :
- 2011
- Publisher :
- HAL CCSD, 2011.
-
Abstract
- The long-term dynamics of the internal kink mode are studied using the non-linear, two-fluid magnetohydrodynamics (MHD) code XTOR-2F (Lutjens et al 2010 J. Comput. Phys. 229 8130). The dynamics of the internal kink are studied in resistive MHD plus transport, and, in addition, also including some two-fluid effects. The simulation results yield a pattern of kink cycles or stationary states with m/n = 1/1 helicity. The threshold for sustained (non-decaying) kink cycles, which characterize sawtooth oscillations, is shown to depend on the plasma pressure, the current and energy diffusion times, and the ion and electron diamagnetic drifts. In particular, the diamagnetic flow stabilization extends the cyclic kink regime into a parameter space that is adequate to carry out studies of sawtooth oscillations in ohmic tokamak discharges.
- Subjects :
- Physics
Tokamak
Condensed matter physics
Oscillation
Atmospheric-pressure plasma
Plasma
Sawtooth wave
Condensed Matter Physics
01 natural sciences
Helicity
010305 fluids & plasmas
law.invention
[PHYS.PHYS.PHYS-COMP-PH]Physics [physics]/Physics [physics]/Computational Physics [physics.comp-ph]
Nuclear Energy and Engineering
Physics::Plasma Physics
law
[PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph]
0103 physical sciences
Atomic physics
Magnetohydrodynamics
010306 general physics
Stationary state
ComputingMilieux_MISCELLANEOUS
Subjects
Details
- Language :
- English
- ISSN :
- 07413335 and 13616587
- Database :
- OpenAIRE
- Journal :
- Plasma Physics and Controlled Fusion, Plasma Physics and Controlled Fusion, IOP Publishing, 2011, 53 (1), pp.015011. ⟨10.1088/0741-3335/53/1/015011⟩
- Accession number :
- edsair.doi.dedup.....d7a05a52a75de82e623796bf4d76994b
- Full Text :
- https://doi.org/10.1088/0741-3335/53/1/015011⟩