Dual equilibrium in a finite aspect ratio tokamak

Details Dual equilibrium in a finite aspect ratio tokamak Dual equilibrium in a finite aspect ratio tokamak

2008-03-29

arxiv.org/abs/0803.4286v1

Physics

Plasma Physics

Scientific paper

10.1016/j.physleta.2008.08.004

A new approach to high pressure magnetically-confined plasmas is necessary to design efficient fusion devices. This paper presents an equilibrium combining two solutions of the Grad-Shafranov equation, which describes the magnetohydrodynamic equilibrium in toroidal geometry. The outer equilibrium is paramagnetic and confines the inner equilibrium, whose strong diamagnetism permits to balance large pressure gradients. The existence of both equilibria in the same volume yields a dual equilibrium structure. Their combination also improves free-boundary mode stability.

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