Small Amplitude Dust–Electron-Acoustic Shock Waves and Double Layers in a Nonextensive Complex Plasma With Viscous Electron Fluids

2016 ◽  
Vol 44 (4) ◽  
pp. 492-500 ◽  
Author(s):  
M. R. Hossen ◽  
S. A. Ema ◽  
A. A. Mamun
Keyword(s):  
Shock Waves ◽  
Small Amplitude ◽  
Double Layers ◽  
Complex Plasma ◽  
Electron Acoustic

Weak Double Layers: Existence, Stability, Evidence

1983 ◽  
Vol 38 (11) ◽  
pp. 1170-1183 ◽  
Author(s):  
H. Schamel
Keyword(s):  
Phase Space ◽  
Small Amplitude ◽  
Tuning Fork ◽  
Hot Electrons ◽  
Double Layers ◽  
Slow Electron ◽  
One Dimensional ◽  
Acoustic Branch ◽  
Beam Type ◽  
Electron Acoustic

Two more classes of monotonic double layers complementing the class of beam-type double layers are investigated analytically, and their range of existence is explored in the small amplitude limit. One class preferentially exists for hot ions and electron drifts of the order of electron thermal velocity. The second one, instead, assumes hot electrons and needs almost current-free conditions. The first class, called SEADL, is based on the slow electron acoustic branch and exhibits a tuning-fork configuration in the electron phase space. Its density decreases with increasing potential. The second one (SIADL) rests on the slow ion acoustic branch and. consequently, has a tuning-fork pattern in the ion phase space. Its density increases with the potential. Both classes are found to be linearly stable with respect to one-dimensional, but unstable with respect to two-dimensional electrostatic perturbations. A comparison with experiments suggests an identification of the second type with the double layers obtained by Hollenstein

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.

Theory of small amplitude electron acoustic double layers

1986 ◽  
Vol 28 (1B) ◽  
pp. 289-297 ◽  
Author(s):  
K S Goswami ◽  
M K Kalita ◽  
S Bujarbarua
Keyword(s):  
Small Amplitude ◽  
Double Layers ◽  
Electron Acoustic

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

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.

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