Stabilization of a magnetic island by localized heating in a tokamak with stiff temperature profile | Zendy

P. Maget | Zendy; Fabien Widmer | Zendy; O. Février | Zendy; X. Garbet | Zendy; H. Lütjens | Zendy

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Stabilization of a magnetic island by localized heating in a tokamak with stiff temperature profile

Author(s) -

P. Maget,

Fabien Widmer,

O. Février,

X. Garbet,

H. Lütjens

Publication year - 2018

Publication title -

physics of plasmas

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.75

H-Index - 160

eISSN - 1089-7674

pISSN - 1070-664X

DOI - 10.1063/1.5021759

Subject(s) - physics , tokamak , turbulence , plasma , amplitude , mechanics , temperature gradient , magnetic field , computational physics , nuclear physics , optics , meteorology , quantum mechanics

In tokamaks plasmas, turbulent transport is triggered above a threshold in the temperature gradient and leads to stiff profiles. This particularity, neglected so far in the problem of magnetic island stabilization by a localized heat source, is investigated analytically in this paper. We show that the efficiency of the stabilization is deeply modified compared to the previous estimates due to the strong dependence of the turbulence level on the additional heat source amplitude inside the island.

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