Nonlinear Stabilization of Tokamak Microturbulence by Fast Ions

TitleNonlinear Stabilization of Tokamak Microturbulence by Fast Ions
Publication TypeJournal Article
Year of Publication2013
AuthorsJ. Citrin, F. Jenko, P. Mantica, D. Told, C. Bourdelle, J. Garcia, J.W Haverkort, G.MD Hogeweij, T. Johnson, M.J Pueschel
JournalPhysical Review Letters
Volume111
Pagination155001
Date PublishedOct
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. [ Phys. Rev. Lett. 107 135004 (2011)], 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.

DOI10.1103/PhysRevLett.111.155001
Division

FP

Department

CPP-HT

PID

b79552ae74a4f49813ab40d1fa18d6b3

Alternate TitlePhys. Rev. Lett.
LabelOA
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