On some properties of linear and nonlinear waves in pair-ion plasmas

Saleem, H.; Vranjes, Jovo; Poedts, Stefaan

doi:10.1016/j.physleta.2005.10.040

Cited by 56 publications

(55 citation statements)

References 8 publications

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“…There are four modes in case of a PIE plasma, all contained in Eq. (11). Two frequencies are purely real and the other two are complex conjugate.…”

Section: Discussionmentioning

confidence: 99%

“…1 and 2. Equation (11) reduces to the electron-ion case for n À0 ¼ 0. In the PIE plasma case, the instability arises for a homogeneous plasma as well.…”

Section: Discussionmentioning

confidence: 99%

“…Some authors have expressed their doubts about these observations. [11][12][13][14] It has been pointed out by one of the present authors 15 that the produced pair-ion fullerene plasma contains electrons as well and it is important to invent some technique to measure the electron density in a PI plasma. A theoretical criterion to define the system as a pure PI plasma has also been presented in this work.…”

Section: Introductionmentioning

confidence: 91%

“…Several theoretical investigations on the linear and nonlinear dynamics of PI plasmas have been carried out. [7][8][9][10][11] A few authors 11 tried, for instance, to explain the observations of the so-called ion acoustic wave (IAW) in Ref. 1 and argued that it was due to the presence of electrons in the fullerene pair plasma.…”

Section: Introductionmentioning

confidence: 99%

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Shear flow-driven electrostatic instabilities in low density and low temperature pair-ion plasmas with and without electrons

2011

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The shear flow-driven electrostatic instabilities are investigated in ideal low density, low temperature pair-ion-electron and pure pair-ion plasmas in several different cases, including homogeneous and inhomogeneous density effects. In uniform pair-ion-electron plasma, when the shear flow is of the order of the acoustic speed, the purely growing D'Angelo mode can give rise to electrostatic fields. In the case of an inhomogeneous plasma, the drift wave becomes unstable. The presence of negative ions, however, reduces the growth rate. If the positive and negative ions are not in thermal equilibrium with each other, then the shear flow also gives rise to an electrostatic instability in pure pair-ion plasma.

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“…There are four modes in case of a PIE plasma, all contained in Eq. (11). Two frequencies are purely real and the other two are complex conjugate.…”

Section: Discussionmentioning

confidence: 99%

“…1 and 2. Equation (11) reduces to the electron-ion case for n À0 ¼ 0. In the PIE plasma case, the instability arises for a homogeneous plasma as well.…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Shear flow-driven electrostatic instabilities in low density and low temperature pair-ion plasmas with and without electrons

2011

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“…This has resulted in numerous theoretical studies [6][7][8][9][10][11][12][13][14][15][16] dealing with various aspects of linear and nonlinear waves and instabilities in pair plasmas. The IF wave has been particularly in focus in a number of works, because the behavior of this mode does not fit into the standard plasma theory.…”

Section: Introductionmentioning

confidence: 99%

Electrostatic modes in multi-ion and pair-ion collisional plasmas

et al. 2008

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The physics of plasmas containing positive and negative ions is discussed with special attention to the recently produced pair-ion plasma containing ions of equal mass and opposite charge. The effects of the density gradient in the direction perpendicular to the ambient magnetic field vector are discussed. The possible presence of electrons is discussed in the context of plasma modes propagating at an angle with respect to the magnetic field vector. It is shown that the electron plasma mode may become a backward mode in the presence of a density gradient, and this behavior may be controlled either by the electron number density or the mode number in the perpendicular direction. In plasmas with hot electrons an instability may develop, driven by the combination of electron collisions and the density gradient, and in the regime of a sound ions' response. In the case of a pure pair-ion plasma, for lower frequencies and for parameters close to those used in the recent experiments, the perturbed ions may feel the effects of the magnetic field. In this case the plasma mode also becomes backward, resembling features of an experimentally observed but yet unexplained backward mode.

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A study of ions' shear flow instabilities and parallel electron current in pure pair‐ion and pair‐ion‐electron plasmas

Shahzad

Rehman

2022

Contributions to Plasma Physics

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The pair-ion plasma has attained special attention due to equal masses and equal but opposite charges. The electrostatic fluctuations with sheared effect are investigated in ideal low-density and low-temperature pure pair-ion (PI) and pair-ion electron (PIE) plasmas in different cases. These instabilities are also studied with homogeneous and inhomogeneous density effects. The growing D'Angelo mode can become the electrostatic instability with shear flow in uniform PIE plasma. It is observed that the shear flow also gives rise to an electrostatic instability in temperature anisotropic pure pair-ion plasma. It is also seen that in pair-ion plasma, the presence of small concentration of electrons results in significant changings in real frequency and growth rate of ion acoustic waves (IAWs). The effect of current driven field aligned flow of electrons on IAWs is also discussed in this article. Kinetic and fluid models are used to study the growth rate of IAWs when both the ionic species have similar shear flow and when both the ionic species have different shear flow.

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On some properties of linear and nonlinear waves in pair-ion plasmas

Cited by 56 publications

References 8 publications

Shear flow-driven electrostatic instabilities in low density and low temperature pair-ion plasmas with and without electrons

Shear flow-driven electrostatic instabilities in low density and low temperature pair-ion plasmas with and without electrons

Electrostatic modes in multi-ion and pair-ion collisional plasmas

A study of ions' shear flow instabilities and parallel electron current in pure pair‐ion and pair‐ion‐electron plasmas

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