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Greenwald limit: Difference between revisions
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The Greenwald limit is an operational limit for the density in magnetic confinement devices: | The Greenwald limit is an operational limit for the density in magnetic confinement devices: | ||
<ref>[ | <ref>[[doi:10.1088/0741-3335/44/8/201|M. Greenwald, ''Density limits in toroidal plasmas'', Plasma Phys. Control. Fusion '''44''' (2002) R27-R53]]</ref> | ||
:<math>n_G = \frac{I_p}{\pi a^2}</math> | :<math>n_G = \frac{I_p}{\pi a^2}</math> | ||
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The mechanism behind this phenomenological limit is not understood, but probably associated with edge gradient limits. | The mechanism behind this phenomenological limit is not understood, but probably associated with edge gradient limits. | ||
Recently, an explanation based on the formation of magnetic island was proposed. <ref>[[doi:10.1103/PhysRevLett.108.165004|D.A. Gates and L. Delgado-Aparicio, ''Origin of Tokamak Density Limit Scalings'', Phys. Rev. Lett. '''108''' (2012) 165004]]</ref> | |||
== References == | == References == | ||
<references /> | <references /> | ||