Multiphase nonlinear electron plasma waves

We present a method for constructing multiphase excitations in the generally non-integrable system of warm fluid equations describing plasma oscillations. It is based on autoresonant excitation of nonlinear electron plasma waves by phase locking with small amplitude chirped-frequency ponderomotive d...

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Bibliographic Details
Published in:arXiv.org 2022-11
Main Authors: Munirov, Vadim R, Friedland, Lazar, Wurtele, Jonathan S
Format: Article
Language:English
Subjects:
Electron plasma
Excitation
Locking
Mathematical models
Multiphase
Plasma
Plasma oscillations
Plasma waves
Online Access:Get full text
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Summary:We present a method for constructing multiphase excitations in the generally non-integrable system of warm fluid equations describing plasma oscillations. It is based on autoresonant excitation of nonlinear electron plasma waves by phase locking with small amplitude chirped-frequency ponderomotive drives. We demonstrate the excitation of these multiphase waves by performing fully nonlinear numerical simulations of the fluid equations. We develop a simplified model based on a weakly nonlinear analytical theory by applying Whitham's averaged Lagrangian procedure. The simplified model predictions are in good agreement with the results from the warm fluid simulations. Such autoresonantly excited multiphase waves form coherent quasicrystalline structures, which can potentially be used as plasma photonic or accelerating devices. Finally, we discuss the laser parameters required for the autoresonant excitation of nonlinear waves in a plasma.
ISSN:2331-8422
DOI:10.48550/arxiv.2205.14511