scholarly journals Electron acoustic solitons in the Earth's magnetotail

2004 ◽  
Vol 11 (2) ◽  
pp. 215-218 ◽  
Author(s):  
S. G. Tagare ◽  
S. V. Singh ◽  
R. V. Reddy ◽  
G. S. Lakhina
Keyword(s):  
Electron Beam ◽  
Small Amplitude ◽  
Low Frequency ◽  
Frequency Component ◽  
Magnetized Plasma ◽  
Cold Electron ◽  
Ion Plasma ◽  
Electron Acoustic ◽  
Two Temperature ◽  
Perpendicular Polarization

Abstract. Small amplitude electron - acoustic solitons are studied in a magnetized plasma consisting of two types of electrons, namely cold electron beam and background plasma electrons and two temperature ion plasma. The analysis predicts rarefactive solitons. The model may provide a possible explanation for the perpendicular polarization of the low-frequency component of the broadband electrostatic noise observed in the Earth's magnetotail.

Small amplitude nonlinear electron acoustic solitary waves in weakly magnetized plasma

2013 ◽  
Vol 20 (1) ◽  
pp. 012113 ◽  
Author(s):  
Manjistha Dutta ◽  
Samiran Ghosh ◽  
Rajkumar Roychoudhury ◽  
Manoranjan Khan ◽  
Nikhil Chakrabarti
Keyword(s):  
Solitary Waves ◽  
Small Amplitude ◽  
Magnetized Plasma ◽  
Electron Acoustic

Nonlinear interaction of electron acoustic waves with Langmuir waves in presence of magnetic field in plasmas

2014 ◽  
Vol 81 (1) ◽  
Author(s):  
Manjistha Dutta ◽  
Manoranjan Khan ◽  
Nikhil Chakrabarti
Keyword(s):  
Magnetic Field ◽  
Nonlinear Interaction ◽  
Acoustic Waves ◽  
Low Frequency ◽  
Acoustic Mode ◽  
Magnetized Plasma ◽  
Langmuir Waves ◽  
Coupled Equations ◽  
Electron Acoustic Wave ◽  
Electron Acoustic

Nonlinear interaction between Langmuir waves and Electron Acoustic Wave (EAW) is being studied in a warm magnetized plasma in presence of two intermingled fluids, hot electrons, and cold electrons while ions forming static background. Two-fluid, two-timescale theory is performed to derive modified Zakharov's equations in a magnetized plasma. These coupled equations describe low-frequency response of electron density due to high-frequency electric field along with magnetic field perturbations. Linear analysis shows coupling between acoustic mode, upper hybrid mode, and cyclotron modes. These modes are found to be modified due to the presence of two electron components. These equations are significant in the context of weak and strong turbulence.

Electron acoustic solitary waves in a magnetized plasma with nonthermal electrons and an electron beam

2016 ◽  
Vol 23 (8) ◽  
pp. 082310 ◽  
Author(s):  
S. V. Singh ◽  
S. Devanandhan ◽  
G. S. Lakhina ◽  
R. Bharuthram
Keyword(s):  
Electron Beam ◽  
Solitary Waves ◽  
Magnetized Plasma ◽  
Nonthermal Electrons ◽  
Electron Acoustic

Effect of electron beam on the properties of electron-acoustic rogue waves

2014 ◽  
Vol 81 (2) ◽  
Author(s):  
E. K. El-Shewy ◽  
S. A. Elwakil ◽  
A. M. El-Hanbaly ◽  
A. I. Kassem
Keyword(s):  
Electron Beam ◽  
Rogue Waves ◽  
Auroral Zone ◽  
Wave Number ◽  
Hot Electron ◽  
Cold Electron ◽  
Carrier Wave ◽  
Basic Set ◽  
Component Plasma ◽  
Electron Acoustic

The properties of nonlinear electron-acoustic rogue waves have been investigated in an unmagnetized collisionless four-component plasma system consisting of a cold electron fluid, Maxwellian hot electrons, an electron beam and stationary ions. It is found that the basic set of fluid equations is reduced to a nonlinear Schrodinger equation. The dependence of rogue wave profiles and the associated electric field on the carrier wave number, normalized density of hot electron and electron beam, relative cold electron temperature and relative beam temperature are discussed. The results of the present investigation may be applicable in auroral zone plasma.

Electron acoustic double layers in a magnetized plasma in the presence of superthermal particles

2019 ◽  
Vol 85 (3) ◽  
Author(s):  
D. Dutta ◽  
K. S. Goswami
Keyword(s):  
Acoustic Waves ◽  
Small Amplitude ◽  
Analytical Study ◽  
Potential Method ◽  
Magnetized Plasma ◽  
Double Layers ◽  
Electrons And Ions ◽  
Mach Numbers ◽  
Electron Acoustic ◽  
Pseudo Potential

An analytical study of the small amplitude electron acoustic double layers in a magnetized plasma consisting of superthermal electrons and ions along with cold fluid electrons is discussed. The dispersion relation allows electron acoustic waves with the frequency within electron and ion gyro-frequency in the modelled plasma. In the process of study of the nonlinear structures, the Sagdeev pseudo-potential method for small amplitude regions is employed. The existence domains for the double layers are investigated in terms of the Mach numbers of the structures and the temperature ratios of the species for different ratios of their concentration. The effects of the compositional parameters on the nature and size of the double layers are also explored and it is observed that the plasma can support both compressive and rarefactive double layers depending on the values of those parameters and the Mach numbers.

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