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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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.
Original languageEnglish
Article number155001
Pages (from-to)155001-1/5
Number of pages5
JournalPhysical Review Letters
Volume111
Issue number15
DOIs
Publication statusPublished - 2013

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stabilization
electromagnetism
pressure gradients
extrapolation
heat flux
stiffness
ions
reactors
heat
simulation

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Citrin, J., Jenko, F., Mantica, P., Told, D., Bourdelle, C., Garcia, J., ... Pueschel, M. J. (2013). Nonlinear stabilization of tokamak microturbulence by fast ions. Physical Review Letters, 111(15), 155001-1/5. [155001]. https://doi.org/10.1103/PhysRevLett.111.155001
Citrin, J. ; Jenko, F. ; Mantica, P. ; Told, D. ; Bourdelle, C. ; Garcia, J. ; Haverkort, J.W. ; Hogeweij, G.M.D. ; Johnson, T. ; Pueschel, M.J. / Nonlinear stabilization of tokamak microturbulence by fast ions. In: Physical Review Letters. 2013 ; Vol. 111, No. 15. pp. 155001-1/5.
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Citrin, J, Jenko, F, Mantica, P, Told, D, Bourdelle, C, Garcia, J, Haverkort, JW, Hogeweij, GMD, Johnson, T & Pueschel, MJ 2013, 'Nonlinear stabilization of tokamak microturbulence by fast ions', Physical Review Letters, vol. 111, no. 15, 155001, pp. 155001-1/5. https://doi.org/10.1103/PhysRevLett.111.155001

Nonlinear stabilization of tokamak microturbulence by fast ions. / Citrin, J.; Jenko, F.; Mantica, P.; Told, D.; Bourdelle, C.; Garcia, J.; Haverkort, J.W.; Hogeweij, G.M.D.; Johnson, T.; Pueschel, M.J.

In: Physical Review Letters, Vol. 111, No. 15, 155001, 2013, p. 155001-1/5.

Research output: Contribution to journalArticleAcademicpeer-review

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AU - Citrin, J.

AU - Jenko, F.

AU - Mantica, P.

AU - Told, D.

AU - Bourdelle, C.

AU - Garcia, J.

AU - Haverkort, J.W.

AU - Hogeweij, G.M.D.

AU - Johnson, T.

AU - Pueschel, M.J.

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AB - 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.

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DO - 10.1103/PhysRevLett.111.155001

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Citrin J, Jenko F, Mantica P, Told D, Bourdelle C, Garcia J et al. Nonlinear stabilization of tokamak microturbulence by fast ions. Physical Review Letters. 2013;111(15):155001-1/5. 155001. https://doi.org/10.1103/PhysRevLett.111.155001