Propagation of three-dimensional electron-acoustic solitary waves

Shalaby, M.; El-Labany, S. K.; Sabry, R.; El-Sherif, L. S.
June 2011
Physics of Plasmas;Jun2011, Vol. 18 Issue 6, p062305
Academic Journal
Theoretical investigation is carried out for understanding the properties of three-dimensional electron-acoustic waves propagating in magnetized plasma whose constituents are cold magnetized electron fluid, hot electrons obeying nonthermal distribution, and stationary ions. For this purpose, the hydrodynamic equations for the cold magnetized electron fluid, nonthermal electron density distribution, and the Poisson equation are used to derive the corresponding nonlinear evolution equation, Zkharov-Kuznetsov (ZK) equation, in the small- but finite- amplitude regime. The ZK equation is solved analytically and it is found that it supports both solitary and blow-up solutions. It is found that rarefactive electron-acoustic solitary waves strongly depend on the density and temperature ratios of the hot-to-cold electron species as well as the nonthermal electron parameter. Furthermore, there is a critical value for the nonthermal electron parameter, which decides whether the electron-acoustic solitary wave's amplitude is decreased or increased by changing various plasma parameters. Importantly, the change of the propagation angles leads to miss the balance between the nonlinearity and dispersion; hence, the localized pulses convert to explosive/blow-up pulses. The relevance of this study to the nonlinear electron-acoustic structures in the dayside auroral zone in the light of Viking satellite observations is discussed.


Related Articles

  • Effect of Dust Grains on Solitary Kinetic Alfvén Wave. Li, Yang-fang; Wu, D. J.; Morfill, G. E. // AIP Conference Proceedings;9/7/2008, Vol. 1041 Issue 1, p275 

    Solitary kinetic Alfvén wave has been studied in dusty plasmas. The effect of the dust charge-to-mass ratio is considered. We derive the Sagdeev potential for the soliton solutions based on the hydrodynamic equations. A singularity in the Sagdeev potential is found and this singularity...

  • Fully nonlinear solitary waves in a dusty electronegative multispecies plasmas. El-Labany, S. K.; Moslem, W. M.; Shnishin, Kh. A.; El-Tantawy, S. A.; Shukla, P. K. // Physics of Plasmas;Apr2011, Vol. 18 Issue 4, p042306 

    The formation and dynamics of fully nonlinear ion-acoustic solitary waves, which accompany electronegative plasmas composed of positive ions, two-negative ions, isothermal electrons, as well as a fraction of stationary charged (positive or negative) dust impurities are investigated. By using the...

  • Ion acoustic solitons in a plasma with two-temperature kappa-distributed electrons. Baluku, T. K.; Hellberg, M. A. // Physics of Plasmas;Jan2012, Vol. 19 Issue 1, p012106 

    Existence domains and characteristics of ion acoustic solitons are studied in a two-temperature electron plasma with both electron components being kappa-distributed, as found in Saturn's magnetosphere. As is the case for double-Boltzmann electrons, solitons of both polarities can exist over...

  • Effective charge and effective radius of water droplet in dropwise cluster. Shavlov, A. V.; Romanyuk, S. N.; Dzhumandzhi, V. A. // Physics of Plasmas;Feb2013, Vol. 20 Issue 2, p023703 

    A particle with large electric charge Z (Z > 1) and radius R0 inserted into plasma is surrounded by a plasma shell, which is stable to weak and short-term external exposures. As a result, during experiments the particle can reveal an effective charge Z* lower than the true one (Z* ≤ Z),...

  • Arbitrary amplitude dust ion acoustic solitary waves in dense Fermi plasmas. Mahmood, S. // Physics of Plasmas;Jan2008, Vol. 15 Issue 1, p014502 

    The arbitrary amplitude dust ion acoustic solitary waves are investigated in unmagnetized quantum plasmas. The quantum hydrodynamic model is employed with the Sagdeev potential approach to describe the nonlinear dust ion acoustic waves in dense Fermi plasmas. It is found that electron density...

  • Dressed electrostatic solitary excitations in three component pair-plasmas: Application in isothermal pair-plasma with stationary ions. Esfandyari-Kalejahi, A.; Akbari-Moghanjoughi, M.; Haddadpour-Khiaban, B. // Physics of Plasmas;Oct2009, Vol. 16 Issue 10, p102302 

    In this work electrostatic solitary waves in a three component pair-plasma consisting of hot isothermal electrons (or negative fullerene ions), positrons (or positive fullerene ions), and stationary positive ions (say, dust particulates) are studied. Using reductive perturbation method, plasma...

  • Towards a complete parametrization of the ordinary-mode electromagnetic instability in counterstreaming plasmas. I. Minimizing ion dynamics. Ibscher, D.; Lazar, M.; Michno, M. J.; Schlickeiser, R. // Physics of Plasmas;Jan2013, Vol. 20 Issue 1, p012103 

    The ordinary mode instability can be driven by drifting bi-Maxwellian plasma particle distributions with and without temperature anisotropy. Here, the linear instability analysis is generalized for realistic settings, when the plasma streams are magnetized and hot enough. The new parametrization...

  • Transitions to improved confinement regimes induced by changes in heating in zero-dimensional models for tokamak plasmas. Zhu, H.; Chapman, S. C.; Dendy, R. O.; Itoh, K. // Physics of Plasmas;Jun2014, Vol. 21 Issue 6, p1 

    It is shown that rapid substantial changes in heating rate can induce transitions to improved energy confinement regimes in zero-dimensional models for tokamak plasma phenomenology. We examine for the first time the effect of step changes in heating rate in the models of Kim and Diamond [Phys....

  • Multi electron species and shielding potentials in plasmas. Khan, Arroj A.; Rasheed, A.; Jamil, M.; Murtaza, G. // Physics of Plasmas;Nov2012, Vol. 19 Issue 11, p114501 

    The phenomenon of Debye shielding is investigated in electron ion plasmas using the approach of two temperature electrons. We get different profiles of potential for different parameters and observe that the potentials fall very slowly than the standard Coulomb and Debye potentials. The...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics