Nonlinear acoustic waves in nonthermal dusty or pair plasmas

Journal Article · Tue Jun 15 04:00:00 EDT 2010 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3435275· OSTI ID:21378023

Verheest, Frank ^[1]

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1. Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281, B-9000 Gent (Belgium) and School of Physics, University of KwaZulu-Natal, Private Bag X54001, Durban 4000 (South Africa)

Using a Sagdeev pseudopotential formalism where nonlinear structures are stationary in a comoving frame, large dust-acoustic solitary waves and double layers have been studied in plasmas with negative cold dust or heavier ions, in the presence of nonthermal electrons and protons/positrons. The existence domain of negative solitary waves is limited by infinite compression of the negative dust or heavy ion species, that of positive solitary waves by the occurrence of positive double layers. These double layers require a sufficient degree of nonthermality of the hot species. There are parameter ranges where both negative and positive solitary structures can occur; sometimes both of the solitary wave type or sometimes one solitary wave and the other a double layer. Great emphasis is placed on the determination of the existence domains in compositional parameter space, with the help of strong analytical results, before typical Sagdeev pseudopotentials and solitary wave profiles are presented. Subject to simple adjustments, these results apply equally to a conjugate plasma model of positive dust or heavy ions, together with nonthermal electrons and protons/positrons.

• OSTI ID: 21378023
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 6 Vol. 17; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BARYONS
CHARGED PARTICLES
DUSTS
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
HADRONS
HEAVY IONS
IONS
LEPTONS
MATTER
NONLINEAR PROBLEMS
NUCLEONS
PLASMA
POSITRONS
PROTONS
QUASI PARTICLES
SOLITONS
SOUND WAVES