Ion acoustic solitary waves and double layers with nonextensive electrons and thermal positrons

Journal Article · Mon Aug 15 04:00:00 EDT 2011 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3620413· OSTI ID:22043387

Sahu, Biswajit ^[1]

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1. Department of Mathematics, West Bengal State University, Barasat, Kolkata 700126 (India)

By using Sagdeev's pseudopotential technique, the problem of arbitrary amplitude ion acoustic solitary waves (IASWs) is discussed for a plasma comprising nonextensive electrons and thermal positrons. The standard normal-mode analysis is used to study the dispersion relation for linear waves. It is found that the present plasma model supports IASWs having positive as well as negative potential well. The influence of nonextensive electrons on the present plasma model is investigated for the existence of solitary waves. The investigation shows that the solitary structure ceases to exist when the parameter q crosses a certain limit. It is also found that both the small amplitude compressive and rarefactive double layer solution can exist in such a plasma system in some parametric region. It is shown that solitary structures and double layers are affected by nonextensivity, as well as by relevant plasma parameters.

• OSTI ID: 22043387
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 8 Vol. 18; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AMPLITUDES
DISPERSION RELATIONS
ELECTRONS
ION ACOUSTIC WAVES
IONS
LAYERS
NORMAL-MODE ANALYSIS
PLASMA
PLASMA SHEATH
POSITRONS
SOLITONS