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Journal Articles Physical Review Letters Year : 2015

Finding the Elusive E × B Staircase in Magnetized Plasmas

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L Vermare
P H Diamond
  • Function : Author
Özgür D. Gürcan
P Hennequin
Pierre Morel

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.
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Dates and versions

cea-01468384 , version 1 (15-02-2017)

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Guilhem Dif-Pradalier, G Hornung, Philippe Ghendrih, Yanick Sarazin, F Clairet, et al.. Finding the Elusive E × B Staircase in Magnetized Plasmas. Physical Review Letters, 2015, 114, pp.085004. ⟨10.1103/PhysRevLett.114.085004⟩. ⟨cea-01468384⟩
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