Cylindrical ion-acoustic solitary waves in electronegative plasmas with superthermal electrons

Journal Article · Fri Jun 15 04:00:00 EDT 2012 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4731690· OSTI ID:22072449

Eslami, Parvin ^[1]; Mottaghizadeh, Marzieh ^[2]

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1. Department of Physics, Ferdowsi University of Mashhad, Mashhad (Iran, Islamic Republic of)
2. Department of Physics, Mashhad Branch, Islamic Azad University, Mashhad (Iran, Islamic Republic of)

By using the standard reductive perturbation technique, a three-dimensional cylindrical Kadomtsev-Petviashvili equation (CKPE), which governs the dynamics of ion acoustic solitary waves (IASWs), is derived for small but finite amplitude ion-acoustic waves in cylindrical geometry in a collisionless unmagnetized plasma with kappa distributed electrons, thermal positrons, and cold ions. The generalized expansion method is used to solve analytically the CKPE. The existence regions of localized pulses are investigated. It is found that the solution of the CKPE supports only compressive solitary waves. Furthermore, the effects of superthermal electrons, the ratio of the electron temperature to positron temperature, the ratio of the positron density to electron density and direction cosine of the wave propagation on the profiles of the amplitudes, and widths of the solitary structures are examined numerically. It is shown these parameters play a vital role in the formation of ion acoustic solitary waves.

• OSTI ID: 22072449
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 6 Vol. 19; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AMPLITUDES
CYLINDRICAL CONFIGURATION
ELECTRON DENSITY
ELECTRON TEMPERATURE
ELECTRONS
ION ACOUSTIC WAVES
MATHEMATICAL SOLUTIONS
PERTURBATION THEORY
PLASMA
POSITRONS
THREE-DIMENSIONAL CALCULATIONS
WAVE PROPAGATION