Island Stability in Phase Space

A. V. Dudkovskaia; X. Garbet; M. Lesur; H. R. Wilson

doi:10.1088/1742-6596/1125/1/012009

Island Stability in Phase Space

A. V. Dudkovskaia, X. Garbet, M. Lesur, H. R. Wilson

Research output: Contribution to journal › Conference article › peer-review

Abstract

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.

Original language	English
Article number	012009
Journal	Journal of Physics: Conference Series
Volume	1125
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/1125/1/012009
Publication status	Published - 23 Nov 2018
Event	2018 Joint Varenna-Lausanne International Workshop on the Theory of Fusion Plasmas - Varenna, Italy Duration: 27 Aug 2018 → 31 Aug 2018

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10.1088/1742-6596/1125/1/012009

Dudkovskaia_2018_J._Phys.__Conf._Ser._1125_012009
© Copyright 2019 IOP Publishing
Final published version, 1.68 MBLicence: CC BY

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AU - Dudkovskaia, A. V.

AU - Garbet, X.

AU - Lesur, M.

AU - Wilson, H. R.

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Y1 - 2018/11/23

N2 - 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.

AB - 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.

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DO - 10.1088/1742-6596/1125/1/012009

M3 - Conference article

AN - SCOPUS:85058294977

SN - 1742-6588

VL - 1125

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

IS - 1

M1 - 012009

T2 - 2018 Joint Varenna-Lausanne International Workshop on the Theory of Fusion Plasmas

Y2 - 27 August 2018 through 31 August 2018

ER -

Island Stability in Phase Space

Abstract

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