Externally Excited Waves in Low-Pressure Plasma Columns

Barrett, P. J.; Little, P. F.

doi:10.1103/physrevlett.14.356

Cited by 31 publications

(2 citation statements)

References 10 publications

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“…It is worth mentioning that this transition from forward to backward modes by increasing the pressure, has in fact been observed experimentally in rare gases as was reported long ago in Ref. 21, but without any explanation about the source of that behavior.…”

Section: Modes In Cold Plasmamentioning

confidence: 58%

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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Section: Modes In Cold Plasmamentioning

confidence: 58%

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

et al. 2008

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“…The theoretical prediction of IA waves was carried out in 1929 by Tonks and Langmuir [2] whereas their experimental verification was done in 1933 by Rewans [3]. Subsequently, other scientists [4][5][6] performed many experiments and confirmed the existence of these waves. Their discovery has motivated the researchers towards investigation of their propagation and excitation in different plasma environments, e.g., see references [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Ion-acoustic waves with non-planar wavefronts

BUKHARI,

SHAHID,

RAHMAN

2024

Plasma Sci. Technol.

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The ion-acoustic (IA) mode exhibiting various orbital angular momentum (OAM) states is examined in a plasma with drifting electrons. The constituent plasma species are modeled with a non-gyrotropic Maxwellian distribution and discussion of dispersion relation and growth rate of twisted IA waves under various conditions are presented. In the domain of kinetic model, the twisted IA waves are characterized by Laguerre-Gaussian (LG) solutions, where plasma distribution function and electric field are decomposed into axial and azimuthal components. The plasma response function is obtained under paraxial approximations and investigated for threshold condition of instability growth rate with helical electric field structures. The impact of an extra electron specie on the instability is demonstrated through a comparison of twisted waves for single and double electron species.

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Diagnostics of L.F. Plasma Fluctuations by Probes and Optical Line Radiation

Prinzler

Savchenko

1978

Contrib Plasma Phys

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Two wide spreuded methods for the measurement of plasma fluctuations are investigated both theoretically and experimentally. In limited regions of frequency and wave number, the fluctuation amplitudes obtained by probes and optical line radiation show sufficient good agreement; in general, however, different effects must be eliminated in order t~ obtain quantitative values. As an application, a transition from isothermal ion acoustic turbulence to a hybrid turbulent state including temperature fluctuations in a low pressure d.c. plasm;\ has been discovered.

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Externally Excited Waves in Low-Pressure Plasma Columns

Cited by 31 publications

References 10 publications

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

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

Ion-acoustic waves with non-planar wavefronts

Diagnostics of L.F. Plasma Fluctuations by Probes and Optical Line Radiation

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