Hudson, S. R.; Hole, M. J.; Dewar, R. L.
A generalized energy principle for finite-pressure, toroidalmagnetohydrodynamic(MHD) equilibria in general three-dimensional configurations is proposed. The full set of ideal-MHD constraints is applied only on a discrete set of toroidal magnetic surfaces (invariant tori), which act as barriers against leakage of magnetic flux, helicity, and pressure through chaotic field-line transport. It is argued that a necessary condition for such invariant tori to exist is that they have fixed, irrational...[Show more]
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