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Title:
Importance of Magnetic Helicity in Dynamos
Authors:
Brandenburg, Axel
Publication:
Cosmic Magnetic Fields. Editor: Richard Wielebinski, Rainer Beck, Lecture Notes in Physics, vol. 664, p.219
Publication Date:
00/2005
Origin:
LNP
DOI:
10.1007/11369875_9
Bibliographic Code:
2005LNP...664..219B

Abstract

Magnetic helicity is nearly conserved and its evolution equation provides a dynamical feedback on the alpha effect that is distinct from the conventional algebraic alpha quenching. The seriousness of this dynamical alpha quenching is particularly evident in the case of closed or periodic boxes. The explicit connection with catastrophic alpha quenching is reviewed and the alleviating effects of magnetic and current helicity fluxes are discussed.
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