Dominant electrostatic nature of the reversed field pinch dynamo

D. Bonfiglio, S. Cappello, D.F. Escande

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Abstract

The origin of the dynamo velocity field of the reversed field pinch within the visco-resistive MHD modeling is uncovered. The main component of this field is an electrostatic drift. The corresponding electrostatic field is related to a small charge separation which is consistent with the quasineutrality approximation, and which should be present in real plasmas, too. While quite natural in the stationary single helicity state, this analysis is shown to extend also to the nonstationary multiple helicity regime. Numerical simulations provide the spatial distribution of fields and of charge separation. © 2005 The American Physical Society.
Original languageEnglish
Article number145001
Pages (from-to)-
JournalPhysical Review Letters
Volume94
Issue number14
DOIs
Publication statusPublished - 15 Apr 2005
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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