Improved particle confinement in transition from multiple-helicity to quasi-single-helicity regimes of a reversed-field pinch

L. Frassinetti, I. Predebon, H. Koguchi, Y. Yagi, Y. Hirano, H. Sakakita, G. Spizzo, R.B. White

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Abstract

The quasi-single-helicity (QSH) state of a reversed-field pinch (RFP) plasma is a regime in which the RFP configuration can be sustained by a dynamo produced mainly by a single tearing mode and in which a helical structure with well-defined magnetic flux surfaces arises. In this Letter, we show that spontaneous transitions to the QSH regime enhance the particle confinement. This improvement is originated by the simultaneous and cooperative action of the increase of the magnetic island and the reduction of the magnetic stochasticity. © 2006 The American Physical Society.
Original languageEnglish
Article number175001
Pages (from-to)-
JournalPhysical Review Letters
Volume97
Issue number17
DOIs
Publication statusPublished - 2006
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Frassinetti, L., Predebon, I., Koguchi, H., Yagi, Y., Hirano, Y., Sakakita, H., ... White, R. B. (2006). Improved particle confinement in transition from multiple-helicity to quasi-single-helicity regimes of a reversed-field pinch. Physical Review Letters, 97(17), -. [175001]. https://doi.org/10.1103/PhysRevLett.97.175001