Arbitrary amplitude electron-acoustic solitons and double layers with Cairns–Tsallis-distributed hot electrons

Pramana ◽  
2021 ◽  
Vol 95 (1) ◽  
Author(s):  
Parveen Bala ◽  
Arshpreet Kaur ◽  
Kirandeep Kaur
Keyword(s):  
Hot Electrons ◽  
Double Layers ◽  
Arbitrary Amplitude ◽  
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

scholarly journals Electron acoustic solitons in the presence of an electron beam and superthermal electrons

2011 ◽  
Vol 18 (5) ◽  
pp. 627-634 ◽  
Author(s):  
S. Devanandhan ◽  
S. V. Singh ◽  
G. S. Lakhina ◽  
R. Bharuthram
Keyword(s):  
Electron Beam ◽  
Mach Number ◽  
Electric Field ◽  
Potential Method ◽  
Hot Electrons ◽  
Superthermal Electron ◽  
Electrons And Ions ◽  
Arbitrary Amplitude ◽  
Unmagnetized Plasma ◽  
Electron Acoustic

Abstract. Arbitrary amplitude electron acoustic solitons are studied in an unmagnetized plasma having cold electrons and ions, superthermal hot electrons and an electron beam. Using the Sagdeev pseudo potential method, theoretical analysis is carried out by assuming superthermal hot electrons having kappa distribution. The results show that inclusion of an electron beam alters the minimum value of spectral index, κ, of the superthermal electron distribution and Mach number for which electron-acoustic solitons can exist and also changes their width and electric field amplitude. For the auroral region parameters, the maximum electric field amplitudes and soliton widths are found in the range ~(30–524) mV m−1 and ~(329–729) m, respectively, for fixed Mach number M = 1.1 and for electron beam speed of (660–1990) km s−1.

Arbitrary amplitude double layers in a four component dusty plasma with kappa distributed electron

2012 ◽  
Vol 342 (1) ◽  
pp. 125-129 ◽  
Author(s):  
Kaushik Roy ◽  
Taraknath Saha ◽  
Prasanta Chatterjee
Keyword(s):  
Dusty Plasma ◽  
Double Layers ◽  
Arbitrary Amplitude

Nonplanar Electron - Acoustic Shock Waves with Superthermal Hot Electrons

2018 ◽  
Vol 48 (6) ◽  
pp. 638-644 ◽  
Author(s):  
Sona Bansal ◽  
Munish Aggarwal ◽  
Tarsem Singh Gill
Keyword(s):  
Shock Waves ◽  
Hot Electrons ◽  
Electron Acoustic

Density and temperature effects on a surface electron-acoustic wave in a semi-bounded dusty plasma of two-temperature electrons

2007 ◽  
Vol 73 (4) ◽  
pp. 433-438 ◽  
Author(s):  
DAE-HAN KI ◽  
YOUNG-DAE JUNG
Keyword(s):  
Acoustic Wave ◽  
Phase Velocity ◽  
Dusty Plasma ◽  
Plasma Wave ◽  
Hot Electrons ◽  
Surface Electron ◽  
Electron Acoustic Wave ◽  
Cold Electrons ◽  
Electron Acoustic ◽  
Two Temperature

AbstractThe effects of density and temperature on a surface electron-acoustic plasma wave are investigated in a semi-bounded dusty plasma of two-temperature electrons. The dispersion relation of the surface electron-acoustic plasma wave is obtained by the plasma dielectric function with the specular reflection boundary condition. The phase velocity is found to be decreased when increasing the ratio of the temperature of hot electrons to that of cold electrons for large wave numbers. It is also found that the phase velocity increases with an increase in the ratio of the density of hot electrons to that of cold electrons and that the phase velocity of the surface electron-acoustic wave increases with an increase in the density of the dust grains.

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