Critically balanced ion temperature gradient turbulence in fusion plasmas

M. Barnes, F. I. Parra, A. A. Schekochihin

Research output: Contribution to journalArticlepeer-review

86 Scopus citations


Scaling laws for ion temperature gradient driven turbulence in magnetized toroidal plasmas are derived and compared with direct numerical simulations. Predicted dependences of turbulence fluctuation amplitudes, spatial scales, and resulting heat fluxes on temperature gradient and magnetic field line pitch are found to agree with numerical results in both the driving and inertial ranges. Evidence is provided to support the critical balance conjecture that parallel streaming and nonlinear perpendicular decorrelation times are comparable at all spatial scales, leading to a scaling relationship between parallel and perpendicular spatial scales. This indicates that even strongly magnetized plasma turbulence is intrinsically three dimensional.

Original languageEnglish (US)
Article number115003
JournalPhysical review letters
Issue number11
StatePublished - Sep 8 2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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