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Dif-Pradalier, G; Hornung, G; Ghendrih, Ph; Sarazin, Y; Clairet, F; Vermare, L; Diamond, P H; Abiteboul, J; Cartier-Michaud, T; Ehrlacher, C; Estève, D; Garbet, X; Grandgirard, V; Gürcan, Ö D; Hennequin, P; Kosuga, Y; Latu, G; Maget, P; Morel, P; Norscini, C; Sabot, R; Storelli, A
Physical review letters, 02/2015, Letnik: 114, Številka: 8Journal Article
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.
