Improvement of the magnetic configuration in the reversed field pinch through successive bifurcations

R. Lorenzini, M. Agostini, A. Alfier, V. Antoni, L. Apolloni, F. Auriemma, O. Barana, M. Baruzzo, P. Bettini, D. Bonfiglio, T. Bolzonella, F. Bonomo, M. Brombin, A. Buffa, A. Canton, S. Cappello, L. Carraro, R. Cavazzana, G. Chitarin, S. Dal BelloA. De Lorenzi, G. De Masi, D.F. Escande, A. Fassina, P. Franz, E. Gaio, E. Gazza, L. Giudicotti, F. Gnesotto, M. Gobbin, L. Grando, S.C. Guo, P. Innocente, A. Luchetta, G. Manduchi, G. Marchiori, D. Marcuzzi, L. Marrelli, P. Martin, S. Martini, E. Martines, F. Milani, M. Moresco, L. Novello, S. Ortolani, R. Paccagnella, R. Pasqualotto, S. Peruzzo, R. Piovan, P. Piovesan, L. Piron, A. Pizzimenti, N. Pomaro, I. Predebon, M.E. Puiatti, G. Rostagni, F. Sattin, P. Scarin, G. Serianni, P. Sonato, E. Spada, A. Soppelsa, S. Spagnolo, G. Spizzo, M. Spolaore, C. Taliercio, D. Terranova, V. Toigo, M. Valisa, P. Veltri, N. Vianello, P. Zaccaria, B. Zaniol, L. Zanotto, E. Zilli, M. Zuin

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Abstract

The reversed field pinch (RFP) is a magnetic configuration alternative to the tokamak that can be considered for a second generation of reactors. In this paper new remarkable results obtained in the RFP experiment RFX-mod are presented, showing that an internal transport barrier delimitates a large fraction of the plasma volume in a RFP when the current is raised to ∼1.5 MA. The formation of this transport barrier is related to a profound, spontaneous modification of the magnetic topology. Due to the occurrence of a saddle node bifurcation the plasma enters in the single helical axis state, which is theoretically known to be more resilient to chaos. This bifurcation is driven by the amplitude of the helical perturbation which dominates the mode spectrum. © 2009 American Institute of Physics.
Original languageEnglish
Article number056109
Pages (from-to)-
JournalPhysics of Plasmas
Volume16
Issue number5
DOIs
Publication statusPublished - 1 Jan 2009
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Lorenzini, R., Agostini, M., Alfier, A., Antoni, V., Apolloni, L., Auriemma, F., ... Zuin, M. (2009). Improvement of the magnetic configuration in the reversed field pinch through successive bifurcations. Physics of Plasmas, 16(5), -. [056109]. https://doi.org/10.1063/1.3082821