Interaction of electrostatic–acoustic solitary waves in a three-component pair-plasma: Oblique collision

2010 ◽  
Vol 374 (15-16) ◽  
pp. 1721-1727 ◽  
Author(s):  
M. Akbari-Moghanjoughi
Keyword(s):  
Solitary Waves ◽  
Oblique Collision ◽  
Pair Plasma ◽  
Component Pair

Study of solitary waves in e-p pair plasma: Effect of weakly relativistic species

2013 ◽  
Author(s):  
Rakhee Malik ◽  
Hitendra K. Malik ◽  
Subhash C. Kaushik
Keyword(s):  
Solitary Waves ◽  
Pair Plasma ◽  
Plasma Effect

Comment on ‘Propagation of solitary waves and shock wavelength in the pair plasma (J. Plasma Phys. 78, 525–529, 2012)’

2014 ◽  
Vol 80 (3) ◽  
pp. 513-516
Author(s):  
Frank Verheest
Keyword(s):  
Shock Wave ◽  
Solitary Wave ◽  
Solitary Waves ◽  
Plasma Phys ◽  
Theoretical Underpinning ◽  
Pair Plasma ◽  
Electrons And Positrons ◽  
Small Dissipation ◽  
Pseudopotential Approach ◽  
Wave Properties

In a recent paper ‘Propagation of solitary waves and shock wavelength in the pair plasma (J. Plasma Phys. 78, 525–529, 2012)’, Malekolkalami and Mohammadi investigate nonlinear electrostatic solitary waves in a plasma comprising adiabatic electrons and positrons, and a stationary ion background. The paper contains two parts: First, the solitary wave properties are discussed through a pseudopotential approach, and then the influence of a small dissipation is intuitively sketched without theoretical underpinning. Small dissipation is claimed to lead to a shock wave whose wavelength is determined by linear oscillator analysis. Unfortunately, there are errors and inconsistencies in both the parts, and their combination is incoherent.

On existence of solitary waves in unmagnetized neutral hot pair plasma

2013 ◽  
Vol 20 (11) ◽  
pp. 112109 ◽  
Author(s):  
Bai-Song Xie ◽  
Zi-Liang Li ◽  
Ding Lu ◽  
Hai-Bo Sang
Keyword(s):  
Solitary Waves ◽  
Pair Plasma

Laboratory experiments on counter-propagating collisions of solitary waves. Part 1. Wave interactions

2014 ◽  
Vol 749 ◽  
pp. 577-596 ◽  
Author(s):  
Yongshuai Chen ◽  
Harry Yeh
Keyword(s):  
Solitary Waves ◽  
Water Surface ◽  
Laboratory Experiments ◽  
Wave Amplitude ◽  
Relative Reduction ◽  
Wave Interactions ◽  
Oblique Collision ◽  
Laboratory Results ◽  
Surface Profiles ◽  
Good Agreement

AbstractCollisions of counter-propagating solitary waves are investigated experimentally. Precision measurements of water-surface profiles are made with the use of the laser induced fluorescence (LIF) technique. During the collision, the maximum wave amplitude exceeds that calculated by the superposition of the incident solitary waves, and agrees well with both the asymptotic prediction of Su & Mirie (J. Fluid Mech., vol. 98, 1980, pp. 509–525) and the numerical simulation of Craig et al. (Phys. Fluids, vol. 18, 2006, 057106). The collision causes attenuation in wave amplitude: the larger the wave, the greater the relative reduction in amplitude. The collision also leaves imprints on the interacting waves with phase shifts and small dispersive trailing waves. Maxworthy’s (J. Fluid Mech., vol. 76, 1976, pp. 177–185) experimental results show that the phase shift is independent of incident wave amplitude. On the contrary, our laboratory results exhibit the dependence of wave amplitude that is in support of Su & Mirie’s theory. Though the dispersive trailing waves are very small and transient, the measured amplitude and wavelength are in good agreement with Su & Mirie’s theory. Furthermore, we investigate the symmetric head-on collision of the highest waves possible in our laboratory. Our laboratory results show that the runup and rundown of the collision are not simple reversible processes. The rundown motion causes penetration of the water surface below the still-water level. This penetration causes the post-collision waveform to be asymmetric, with each departing wave tilting slightly backward with respect to the direction of its propagation; the penetration is also the origin of the secondary dispersive trailing wavetrain. The present work extends the studies of head-on collisions to oblique collisions. The theory of Su & Mirie, which was developed only for head-on collisions, predicts well in oblique collision cases, which suggests that the obliqueness of the collision may not be important for this ‘weak’ interaction process.

Dressed electrostatic solitary excitations in three component pair-plasmas: Application in isothermal pair-plasma with stationary ions

2009 ◽  
Vol 16 (10) ◽  
pp. 102302 ◽  
Author(s):  
A. Esfandyari-Kalejahi ◽  
M. Akbari-Moghanjoughi ◽  
B. Haddadpour-Khiaban
Keyword(s):  
Pair Plasma ◽  
Component Pair

Propagation of solitary waves and shock wavelength in the pair plasma

2012 ◽  
Vol 78 (5) ◽  
pp. 525-529 ◽  
Author(s):  
BEHROOZ MALEKOLKALAMI ◽  
TAIMUR MOHAMMADI
Keyword(s):  
Solitary Waves ◽  
Critical Value ◽  
Minimal Point ◽  
Sagdeev Potential ◽  
Plasma Parameters ◽  
Plasma System ◽  
Electrostatic Waves ◽  
Pair Plasma ◽  
The Media ◽  
Generate Shock Wave

AbstractThe propagation of electrostatic waves is studied in plasma system consisting of pair-ions and stationary additional ions in presence of the Sagdeev potential (pseudopotential) as function of electrostatic potential (pseudoparticle). It is remarked that both compressive and rarefective solitary waves can be propagated in this plasma system. These electrostatic solitary waves, however, cannot be propagated if the density of stationary ions increases from one critical value or decreases from another when the temperature and the Mach number are fixed. Also, when pseudoparticle is affected with a little dissipation of energy, it is trapped in potential well and can oscillate. Oscillations generate shock wave in the media, and in the negative minimal point of the well it is possible to compute numerically the shock wavelength for the allowed values of the plasma parameters.

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