Article Dans Une Revue Physical Review Letters Année : 2010

Existence of metastable kinetic modes

Résumé

The nonlinear evolution of resonantly driven systems, such as suprathermal particle driven modes in magnetically confined plasmas, is shown to strongly depend on the existence and nature of an underlying damping mechanism. When background resonant damping is present, subcritical states can take place. In particular, purely nonlinear steady-state regimes are found, whose destabilization threshold and saturation levels are calculated and validated using numerical simulations. This nonlinear behavior can be of relevance for acoustic modes in magnetically confined plasmas.

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hal-03319149 , version 1 (28-02-2025)

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Christine Nguyen, Hinrich Lütjens, Xavier Garbet, Virginie Grandgirard, Maxime Lesur. Existence of metastable kinetic modes. Physical Review Letters, 2010, 105 (20), pp.205002. ⟨10.1103/PhysRevLett.105.205002⟩. ⟨hal-03319149⟩
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