Electrostatic waves in superthermal dusty plasmas: review of recent advancement

Journal Article · Tue Nov 29 04:00:00 EST 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3659745· OSTI ID:21612251

Kourakis, I; Sultana, S ^[1]

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1. Centre for Plasma Physics, School of Mathematics and Physics, Queen's University Belfast BT7 1NN Belfast, Northern Ireland (United Kingdom)

Real plasmas are often caracterized by the presence of excess energetic particle populations, resulting in a long-tailed non-Maxwellian distribution. In Space plasma physics, this phenomenon is usually modelled via a kappa-type distribution. This presentation is dedicated to an investigation, from first principles, of the effect of superthermality on the characteristics of dusty plasma modes. We employ a kappa distribution function to model the superthermality of the background components (electrons and/or ions). Background superthermality is shown to modify the charge screening mechanism in dusty plasmas, thus affecting the linear dispersion laws of both low-and higher frequency DP modes substantially. Various experimentally observed effects may thus be interpreted as manifestations of superthermality. Focusing on the features of nonlinear excitations (solitons) as they occur in different dusty plasma modes, we investigate the role of superthermality in their propagation dynamics (existence laws, stability profile) and characteristics (geometry).

• OSTI ID: 21612251
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1397; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
79 ASTRONOMY AND ASTROPHYSICS
CHARGED PARTICLES
COLLISIONS
DISTRIBUTION
DISTRIBUTION FUNCTIONS
DOCUMENT TYPES
ELECTRON COLLISIONS
ELECTRONS
ELEMENTARY PARTICLES
ENERGY-LEVEL TRANSITIONS
EXCITATION
FERMIONS
FUNCTIONS
INTERSTELLAR SPACE
IONS
LEPTONS
NONLINEAR PROBLEMS
PLASMA
PLASMA WAVES
QUASI PARTICLES
REVIEWS
SOLITONS
SPACE
WAVE PROPAGATION