Self-organized helical equilibria as a new paradigm for ohmically heated fusion plasmas

R. Lorenzini, E. Martines, P. Piovesan, D. Terranova, P. Zanca, M. Zuin, A. Alfier, D. Bonfiglio, F. Bonomo, A. Canton, S. Cappello, L. Carraro, R. Cavazzana, D.F. Escande, A. Fassina, P. Franz, M. Gobbin, P. Innocente, L. Marrelli, R. PasqualottoM.E. Puiatti, M. Spolaore, M. Valisa, N. Vianello, P. Martin, L. Apolloni, M.E. Puiatti, J. Adamek, M. Agostini, A. Alfier, S.V. Annibaldi, V. Antoni, F. Auriemma, O. Barana, M. Baruzzo, P. Bettini, T. Bolzonella, D. Bonfiglio, F. Bonomo, M. Brombin, J. Brotankova, A. Buffa, P. Buratti, A. Canton, S. Cappello, L. Carraro, R. Cavazzana, M. Cavinato, B.E. Chapman, G. Chitarin, S. Dal Bello, A. De Lorenzi, G. De Masi, D.F. Escande, A. Fassina, A. Ferro, P. Franz, E. Gaio, E. Gazza, L. Giudicotti, F. Gnesotto, M. Gobbin, L. Grando, L. Guazzotto, S.C. Guo, V. Igochine, P. Innocente, Y.Q. Liu, R. Lorenzini, A. Luchetta, G. Manduchi, G. Marchiori, D. Marcuzzi, L. Marrelli, S. Martini, E. Martines, K. McCollam, F. Milani, M. Moresco, L. Novello, S. Ortolani, R. Paccagnella, R. Pasqualotto, S. Peruzzo, R. Piovan, L. Piron, A. Pizzimenti, N. Pomaro, I. Predebon, J.A. Reusch, G. Rostagni, G. Rubinacci, J.S. Sarff, F. Sattin, P. Scarin, G. Serianni, P. Sonato, E. Spada, A. Soppelsa, S. Spagnolo, M. Spolaore, G. Spizzo, C. Taliercio, D. Terranova, V. Toigo, M. Valisa, N. Vianello, F. Villone, R.B. White, D. Yadikin, P. Zaccaria, A. Zamengo, P. Zanca, B. Zaniol, L. Zanotto, E. Zilli, H. Zohm, M. Zuin Zuin

Research output: Contribution to journalLetter

229 Citations (Scopus)

Abstract

In the quest for new energy sources, the research on controlled thermonuclear fusion has been boosted by the start of the construction phase of the International Thermonuclear Experimental Reactor (ITER). ITER is based on the tokamak magnetic configuration, which is the best performing one in terms of energy confinement. Alternative concepts are however actively researched, which in the long term could be considered for a second generation of reactors. Here, we show results concerning one of these configurations, the reversed-field pinch (RFP). By increasing the plasma current, a spontaneous transition to a helical equilibrium occurs, with a change of magnetic topology. Partially conserved magnetic flux surfaces emerge within residual magnetic chaos, resulting in the onset of a transport barrier. This is a structural change and sheds new light on the potential of the RFP as the basis for a low-magnetic-field ohmic fusion reactor. © 2009 Macmillan Publishers Limited.
Original languageEnglish
Pages (from-to)570 - 574
Number of pages5
JournalNature Physics
Volume5
Issue number8
DOIs
Publication statusPublished - Aug 2009
Externally publishedYes

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Lorenzini, R., Martines, E., Piovesan, P., Terranova, D., Zanca, P., Zuin, M., Alfier, A., Bonfiglio, D., Bonomo, F., Canton, A., Cappello, S., Carraro, L., Cavazzana, R., Escande, D. F., Fassina, A., Franz, P., Gobbin, M., Innocente, P., Marrelli, L., ... Zuin, M. Z. (2009). Self-organized helical equilibria as a new paradigm for ohmically heated fusion plasmas. Nature Physics, 5(8), 570 - 574. https://doi.org/10.1038/nphys1308