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Are ghost surfaces quadratic-flux-minimizing?

Hudson, Stuart R; Dewar, Robert


Two candidates for "almost-invariant" toroidal surfaces passing through magnetic islands, namely quadratic-flux-minimizing (QFMin) surfaces and ghost surfaces, use families of periodic pseudo-orbits (i.e. paths for which the action is not exactly extremal). QFMin pseudo-orbits, which are coordinate-dependent, are field lines obtained from a modified magnetic field, and ghost-surface pseudo-orbits are obtained by displacing closed field lines in the direction of steepest descent of magnetic...[Show more]

CollectionsANU Research Publications
Date published: 2009
Type: Journal article
Source: Physics Letters A
DOI: 10.1016/j.physleta.2009.10.005


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