Conservation of magnetic helicity during plasma relaxation

H. Ji, S. C. Prager, J. S. Sarff

Research output: Contribution to journalArticlepeer-review

61 Scopus citations


The change in magnetic energy and magnetic helicity has been measured during the sawtooth relaxation in the Madison Symmetric Torus reversed-field pinch. The larger decay of the energy (4.0%-10.5%), relative to helicity decay (1.3%-5.1%), modestly supports the helicity conservation hypothesis in Taylor's relaxation theory. However, the observed helicity change is larger than the simple magnetohydrodynamics prediction. Enhanced fluctuation-induced helicity transport during the relaxation is observed.

Original languageEnglish (US)
Pages (from-to)2945-2948
Number of pages4
JournalPhysical review letters
Issue number15
StatePublished - 1995

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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