Finding the Elusive E×B Staircase in Magnetized Plasmas

G. Dif-Pradalier, G. Hornung, Ph Ghendrih, Y. Sarazin, F. Clairet, L. Vermare, P. H. Diamond, J. Abiteboul, T. Cartier-Michaud, C. Ehrlacher, D. Estève, X. Garbet, V. Grandgirard, O. D. Gürcan, P. Hennequin, Y. Kosuga, G. Latu, P. Maget, P. Morel, C. NorsciniR. Sabot, A. Storelli

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Abstract

Turbulence in hot magnetized plasmas is shown to generate permeable localized transport barriers that globally organize into the so-called "ExB staircase" [G. Dif-Pradalier et al., Phys. Rev. E, 82, 025401(R) (2010)]. Its domain of existence and dependence with key plasma parameters is discussed theoretically. Based on these predictions, staircases are observed experimentally in the Tore Supra tokamak by means of high-resolution fast-sweeping X-mode reflectometry. This observation strongly emphasizes the critical role of mesoscale self-organization in plasma turbulence and may have far-reaching consequences for turbulent transport models and their validation.

Original languageEnglish
Article number085004
JournalPhysical Review Letters
Volume114
Issue number8
DOIs
Publication statusPublished - Feb 27 2015

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Dif-Pradalier, G., Hornung, G., Ghendrih, P., Sarazin, Y., Clairet, F., Vermare, L., ... Storelli, A. (2015). Finding the Elusive E×B Staircase in Magnetized Plasmas. Physical Review Letters, 114(8), [085004]. https://doi.org/10.1103/PhysRevLett.114.085004