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Nonlinear stabilization of tokamak microturbulence by fast ions
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2013 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 111, no 15, 155001- p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2013. Vol. 111, no 15, 155001- p.
Keyword [en]
Transport, Plasma, Simulations, Turbulence, Jet
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-133153DOI: 10.1103/PhysRevLett.111.155001ISI: 000325371500006ScopusID: 2-s2.0-84885350797OAI: diva2:659999

QC 20131028

Available from: 2013-10-28 Created: 2013-10-28 Last updated: 2013-11-08Bibliographically approved

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Johnson, Thomas
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Fusion Plasma Physics
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