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Magnetic island: Difference between revisions
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== Island birth == | == Island birth == | ||
The rupture of the assumed initial topology of toroidally nested flux surfaces needed to produce the island requires the reconnection of magnetic field lines, which can only occur with finite resistivity. | The rupture of the assumed initial topology of toroidally nested flux surfaces needed to produce the island requires the [[reconnection]] of magnetic field lines, which can only occur with finite resistivity. | ||
<ref>F.L. Waelbroeck, ''Theory and observations of magnetic islands'', [[doi:10.1088/0029-5515/49/10/104025|Nucl. Fusion '''49''' (2009) 104025]]</ref> | <ref>F.L. Waelbroeck, ''Theory and observations of magnetic islands'', [[doi:10.1088/0029-5515/49/10/104025|Nucl. Fusion '''49''' (2009) 104025]]</ref> | ||
[[Stellarator]]s may have a vacuum magnetic field structure that already contains some islands (so-called 'natural islands'). | [[Stellarator]]s may have a vacuum magnetic field structure that already contains some islands (so-called 'natural islands'). | ||
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The interaction of neighbouring island chains causes the magnetic field to become stochastic (according to the Chirikov criterion <ref>B.V. Chirikov, ''A universal instability of many-dimensional oscillator systems'', [[doi:10.1016/0370-1573(79)90023-1|Phys. Rep. '''52''', Issue 5 (1979) 263]]</ref>), resulting in enhanced (anomalous) radial transport. | The interaction of neighbouring island chains causes the magnetic field to become stochastic (according to the Chirikov criterion <ref>B.V. Chirikov, ''A universal instability of many-dimensional oscillator systems'', [[doi:10.1016/0370-1573(79)90023-1|Phys. Rep. '''52''', Issue 5 (1979) 263]]</ref>), resulting in enhanced (anomalous) radial transport. | ||
<ref>C.W. Horton, Y.H. Ichikawa, ''Chaos and structures in nonlinear plasmas'', World Scientific, 1996 ISBN 9789810226367</ref> | <ref>C.W. Horton, Y.H. Ichikawa, ''Chaos and structures in nonlinear plasmas'', World Scientific, 1996 {{ISBN|9789810226367}}</ref> | ||
== Island control == | == Island control == | ||
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== See also == | == See also == | ||
* [[MHD equilibrium]] | * [[MHD equilibrium]] | ||
* [[Island Divertor]] | |||
== References == | == References == | ||
<references /> | <references /> | ||