Island Stability in Phase Space

Autor: Xavier Garbet, A. V. Dudkovskaia, H. R. Wilson, Maxime Lesur
Přispěvatelé: York Plasma Institute (YPI), University of York [York, UK], Institut de Recherche sur la Fusion par confinement Magnétique (IRFM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut Jean Lamour (IJL), Université de Lorraine (UL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Culham Centre for Fusion Energy (CCFE), Institut de Chimie du CNRS (INC)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: Journal of Physics: Conference Series
Journal of Physics: Conference Series, IOP Publishing, 2018, 1125, pp.012009. ⟨10.1088/1742-6596/1125/1/012009⟩
Journal of Physics: Conference Series, 2018, 1125, pp.012009. ⟨10.1088/1742-6596/1125/1/012009⟩
ISSN: 1742-6588
1742-6596
0741-3335
0029-5515
0038-5646
Popis: International audience; Starting with a conventional bump on tail problem, which is equivalent to finding a solution of the Vlasov/Fokker-Planck equation in the presence of the phase space island, we obtain a primary equilibrium state. The stability of this state is investigated as a function of the effective velocity-space drag and diffusion, as well as the width of these phase space islands. The secondary instabilities have been found in a certain range of plasma parameters and wave numbers. Solving the full Vlasov/Fokker-Planck-Poisson system, we obtain the dispersion function, which provides information about the secondary mode onset and allows an estimate of the secondary mode growth rate for different input plasma parameters.
Databáze: OpenAIRE
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