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

doi:10.1103/PhysRevLett.111.155001

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

Scientific Computing

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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.

Originele taal-2	Engels
Artikelnummer	155001
Aantal pagina's	5
Tijdschrift	Physical Review Letters
Volume	111
Nummer van het tijdschrift	15
DOI's	https://doi.org/10.1103/PhysRevLett.111.155001
Status	Gepubliceerd - 2013

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10.1103/PhysRevLett.111.155001

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AU - Garcia, J.

AU - Haverkort, J.W.

AU - Hogeweij, G.M.D.

AU - Johnson, T.

AU - Pueschel, M.J.

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