Toroidal L and H equilibria with axisymmetric rotations

Details Toroidal L and H equilibria with axisymmetric rotations Toroidal L and H equilibria with axisymmetric rotations

2009-02-04

arxiv.org/abs/0902.0725v1

Physics

Plasma Physics

Scientific paper

Axisymmetric toroidal equilibria with toroidal and poloidal rotations are solved with a specific set of source functions. The two independent solutions are associated to L and H modes. The L/H transition is regarded as a bifurcation from one equilibrium configuration to another, under strong external heating and pellet injection to shape temperature and density profiles. Because of the steep edge gradient of the H solution, large static radial electric field, zonal flow, and improved confinements, come as consequences, not causes, of the H mode.

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