Nonlinear stabilization of tokamak microturbulence by fast ions

J. Citrin, F. Jenko, P. Mantica, D. Told, C. Bourdelle, J. Garcia, J. W. Haverkort, G. M.D. Hogeweij, T. Johnson, M. J. Pueschel

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117 Citations (Scopus)

Abstract

Nonlinear electromagnetic stabilization by suprathermal pressure gradients found in specific regimes is shown to be a key factor in reducing tokamak microturbulence, augmenting significantly the thermal pressure electromagnetic stabilization. Based on nonlinear gyrokinetic simulations investigating a set of ion heat transport experiments on the JET tokamak, described by Mantica et al., this result explains the experimentally observed ion heat flux and stiffness reduction. These findings are expected to improve the extrapolation of advanced tokamak scenarios to reactor relevant regimes.

Original languageEnglish
Article number155001
JournalPhysical Review Letters
Volume111
Issue number15
DOIs
Publication statusPublished - 7 Oct 2013
Externally publishedYes

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