Lower hybrid wave nonlinear saturation and turbulence in the magnetopause

The proposed work presents a model to understand the lower hybrid turbulence in the magnetic reconnection regions of magnetopause by the energetic electron beams (generated by the magnetic reconnection process). The magnetic reconnection process has been substituted by the energetic electron beam so...

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Bibliographic Details
Published in:Astrophysics and space science 2023-04, Vol.368 (4), p.30, Article 30
Main Authors: Upadhyay, Manoj K., Pathak, Neha, Uma, R., Sharma, R. P.
Format: Article
Language:English
Subjects:
Amplitudes
Astrobiology
Astronomy
Astrophysics
Astrophysics and Astroparticles
Cosmology
Electron beams
Energy
Fluid dynamics
Fluid flow
Hydrodynamics
Localization
Magnetic fields
Magnetic reconnection
Magnetopause
Mathematical models
Modelling
Numerical simulations
Observations and Techniques
Perturbation
Physics
Physics and Astronomy
Plasma
Ponderomotive forces
Simulation
Space Exploration and Astronautics
Space Sciences (including Extraterrestrial Physics
Turbulence
Two dimensional models
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Summary:The proposed work presents a model to understand the lower hybrid turbulence in the magnetic reconnection regions of magnetopause by the energetic electron beams (generated by the magnetic reconnection process). The magnetic reconnection process has been substituted by the energetic electron beam source in this model. Due to beam energy, lower hybrid waves (LHW) evolve from very small to large amplitude (saturation) and then to LHW localization and the turbulent state. A nonlinear two-dimensional model with the help of two-fluid dynamics has been developed. The mathematical model considers the interaction between pump LHW and low frequency magnetosonic wave (MSW). The MSW, present in the background, has been contemplated as the source of density perturbations in LHW dynamics. The ponderomotive force components arise due to high-frequency LHW. With the help of the growth term associated with the electron beam, dynamical equations for LHW and MSW have been derived. The two coupled equations, thus obtained, are solved with the help of numerical simulation techniques. The results show the LHW’s temporal evolution (growth) from a very small amplitude and then the formation of localized structures and turbulence.
ISSN:0004-640X
1572-946X
DOI:10.1007/s10509-023-04186-2