Helicity-flux-driven α effect in laboratory and astrophysical plasmas

F. Ebrahimi, A. Bhattacharjee

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

The constraint imposed by magnetic helicity conservation on the α effect is considered for both magnetically and flow dominated self-organizing plasmas. Direct numerical simulations are presented for a dominant contribution to the α effect, which can be cast in the functional form of a total divergence of an averaged helicity flux, called the helicity-flux-driven α (Hα) effect. Direct numerical simulations of the Hα effect are presented for two examples - the magnetically dominated toroidal plasma unstable to tearing modes, and the flow-dominated accretion disk.

Original languageEnglish (US)
Article number125003
JournalPhysical review letters
Volume112
Issue number12
DOIs
StatePublished - Dec 1 2013

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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