1. On the Equilibrium and Stability of ITER Relevant Plasmas
- Author
-
Henri Tasso, G. N. Throumoulopoulos, and Ap Kuiroukidis
- Subjects
Physics ,Tokamak ,media_common.quotation_subject ,Rotational symmetry ,Plasma ,Mechanics ,Asymmetry ,Magnetic field ,law.invention ,Physics::Fluid Dynamics ,Classical mechanics ,Physics::Plasma Physics ,law ,Plasma shaping ,Magnetohydrodynamics ,Linear stability ,media_common - Abstract
We present recent results on steady states of translational symmetric and axisymmetric ITER relevant plasmas with incompressible sheared flow in connection with a generalized Grad-Shafranov (GGS) equation and on their stability. On the basis of a vari- ety of ITER pertinent solutions of the GGS equation constructed it turns out that the flow affects noticeably the equilibrium quantities in qualitative agreement with the advanced confinement regimes phenomenology. Also, application of a sufficient condition for linear stability indicates that stabilization is mainly caused by the variation of the magnetic field in the direction perpendicular to the magnetic surfaces, related to the magnetic shear, depends on the plasma shaping and is sensitive to the up-down asymmetry. In certain cases the sheared flow has a weaker stabilizing effect enhanced by the equilibrium nonlinearity.
- Published
- 2015
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