Compressive ion acoustic double layer and its transitional properties for a two electron temperature warm, multi-ion plasma

2018 ◽  
Vol 25 (1) ◽  
pp. 012307 ◽  
Author(s):  
S. V. Steffy ◽  
S. S. Ghosh
Keyword(s):  
Electron Temperature ◽  
Double Layer ◽  
Ion Plasma ◽  
Ion Acoustic

Ion-acoustic instabilities driven by an ion velocity ring

1985 ◽  
Vol 34 (3) ◽  
pp. 467-479 ◽  
Author(s):  
K. Akimoto ◽  
K. Papadopoulos ◽  
D. Winske
Keyword(s):  
Magnetic Field ◽  
Electron Temperature ◽  
Dispersion Equation ◽  
Plasma Frequency ◽  
Ion Temperature ◽  
Ion Distribution ◽  
Electrostatic Waves ◽  
Ion Plasma ◽  
Ion Acoustic ◽  
Acoustic Instabilities

A ring distribution of ions in velocity space can generate electrostatic waves which propagate predominantly along an ambient magnetic field at frequencies comparable with the ion plasma frequency. A dispersion equation which accounts for these waves is presented, and solved analytically and numerically. It was found that ion-acoustic-like waves are excited in a plasma even if the electron temperature is comparable with the ion temperature under the assumption of an anisotropic ion distribution.

Large Mach number ion acoustic rarefactive solitary waves for a two electron temperature warm ion plasma

1996 ◽  
Vol 3 (11) ◽  
pp. 3939-3946 ◽  
Author(s):  
S. S. Ghosh ◽  
K. K. Ghosh ◽  
A. N. Sekar Iyengar
Keyword(s):  
Mach Number ◽  
Electron Temperature ◽  
Solitary Waves ◽  
Ion Plasma ◽  
Ion Acoustic

Ion-acoustic solitary structures at the acoustic speed in a collisionless magnetized nonthermal dusty plasma

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Debdatta Debnath ◽  
Anup Bandyopadhyay
Keyword(s):  
Double Layer ◽  
Negative Polarity ◽  
Critical Value ◽  
Magnetized Plasma ◽  
Double Layers ◽  
Nonthermal Electrons ◽  
Solitary Structures ◽  
Ion Acoustic ◽  
Density Of Electrons ◽  
Acoustic Speed

Abstract At the acoustic speed, we have investigated the existence of ion-acoustic solitary structures including double layers and supersolitons in a collisionless magnetized plasma consisting of negatively charged static dust grains, adiabatic warm ions, and nonthermal electrons. At the acoustic speed, for negative polarity, the system supports solitons, double layers, supersoliton structures after the formation of double layer, supersoliton structures without the formation of double layer, solitons after the formation of double layer whereas the system supports solitons and supersolitons without the formation of double layer for the case of positive polarity. But it is not possible to get the coexistence of solitary structures (including double layers and supersolitons) of opposite polarities. For negative polarity, we have observed an important transformation viz., soliton before the formation of double layer → double layer → supersoliton → soliton after the formation of double layer whereas for both positive and negative polarities, we have observed the transformation from solitons to supersolitons without the formation of double layer. There does not exist any negative (positive) potential solitary structures within 0 < μ < μ c (μ c < μ < 1) and the amplitude of the positive (negative) potential solitary structure decreases for increasing (decreasing) μ and the solitary structures of both polarities collapse at μ = μ c, where μ c is a critical value of μ, the ratio of the unperturbed number density of electrons to that of ions. Similarly there exists a critical value β e2 of the nonthermal parameter β e such that the solitons of both polarities collapse at β e = β e2.

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