Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/102092
Title: Extreme driven ion acoustic waves
Authors: Friedland, L.
Shagalov, A. G.
Issue Date: 2017
Publisher: American Institute of Physics Inc.
Citation: Friedland L. Extreme driven ion acoustic waves / L. Friedland, A. G. Shagalov. — DOI 10.1063/1.4986031 // Physics of Plasmas. — 2017. — Vol. 24. — Iss. 8. — 082106.
Abstract: The excitation of large amplitude, strongly nonlinear ion acoustic waves from trivial equilibrium by a chirped frequency drive is discussed. Under certain conditions, after passage through the linear resonance in this system, the nonlinearity and the variation of parameters work in tandem to preserve the phase-locking with the driving wave via excursion of the excited ion acoustic wave in its parameter space, yielding controlled growth of the wave amplitude. We study these autoresonant waves via a fully nonlinear warm fluid model and predict the formation of sharply peaked (extreme) ion acoustic excitations with local ion density significantly exceeding the unperturbed plasma density. The driven wave amplitude is bound by the kinetic wave-breaking, as the local maximum fluid velocity of the wave approaches the phase velocity of the drive. The Vlasov-Poisson simulations are used to confirm the results of the fluid model, and Whitham's averaged variational principle is applied for analyzing the evolution of autoresonant ion acoustic waves. © 2017 Author(s).
Keywords: ION ACOUSTIC WAVES
IONS
LOCKS (FASTENERS)
PLASMA DENSITY
ACOUSTIC EXCITATION
CONTROLLED GROWTH
FLUID VELOCITIES
STRONGLY NONLINEAR
TRIVIAL EQUILIBRIUM
VARIATION OF PARAMETERS
VARIATIONAL PRINCIPLES
VLASOV-POISSON SIMULATIONS
ACOUSTIC WAVES
URI: http://hdl.handle.net/10995/102092
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85026807617
PURE ID: 1971809
5d11bfb2-dcc0-4892-b5ef-9ea74148ae8d
ISSN: 1070664X
DOI: 10.1063/1.4986031
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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