Nonlinear stabilization of tokamak microturbulence by fast ions

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Nonlinear stabilization of tokamak microturbulence by fast ions

Journal Article (2013)

Author(s)

J. Citrin (CEA Cadarache, FOM Institute DIFFER - Dutch Institute for Fundamental Energy Research)

F. Jenko (Max Planck Institute)

P. Mantica (Associazione Euratom-ENEA-CNR)

D. Told (Max Planck Institute)

C. Bourdelle (CEA Cadarache)

J. Garcia

J. W. Haverkort (Centrum Wiskunde & Informatica (CWI), FOM Institute DIFFER - Dutch Institute for Fundamental Energy Research)

G. M.D. Hogeweij (FOM Institute DIFFER - Dutch Institute for Fundamental Energy Research)

T. Johnson (KTH Royal Institute of Technology)

M. J. Pueschel (University of Wisconsin-Madison)

DOI related publication

https://doi.org/10.1103/PhysRevLett.111.155001 Final published version

To reference this document use

https://resolver.tudelft.nl/uuid:6e3c8a23-cece-4082-b1b6-8c15a081a029

More Info

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Publication Year

2013

Language

English

Issue number

15

Volume number

111

Article number

155001

Downloads counter

182

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.