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A new formulation for the dielectric tensor for magnetized dusty plasmas with variable charge on the dust particles

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A new formulation for the dielectric tensor for magnetized dusty plasmas with variable charge on the dust particles

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Título A new formulation for the dielectric tensor for magnetized dusty plasmas with variable charge on the dust particles
Autor Ziebell, Luiz Fernando
Schneider, Ruth de Souza
Juli, Marcelo Camargo de
Gaelzer, Rudi
Abstract A kinetic approach to the problem of wave propagation in dusty plasmas, which takes into account the variation of the charge of the dust particles due to inelastic collisions with electrons and ions, is utilized as a starting point for the development of a new formulation, which writes the components of the dielectric tensor in terms of a finite and an infinite series, containing all effects of harmonics and Larmor radius. The formulation is quite general and valid for the whole range of frequencies above the plasma frequency of the dust particles, which were assumed motionless. The formulation is employed to the study of electrostatic waves propagating along the direction of the ambient magnetic field, in the case for which ions and electrons are described by Maxwellian distributions. The results obtained in a numerical analysis corroborate previous analysis, about the important role played by the inelastic collisions between electrons and ions and the dust particles, particularly on the imaginary part of the dispersion relation. The numerical analysis also show that additional terms in the components of the dielectric tensor, which are entirely due these inelastic collisions, play a very minor role in the case of electrostatic waves, under the conditions considered in the present analysis.
Contido em Brazilian journal of physics. São Paulo. Vol. 38, no. 3A (Sept. 2008), p. 297-322
Assunto Fisica de plasmas
Ondas de Langmuir em plasmas
Ondas eletrostáticas em plasmas
Propagacao de ondas
Teoria cinetica
[en] Dust charge fluctuation
[en] Electrostatic waves
[en] Kinetic theory
[en] Langmuir waves
[en] Magnetized dusty plasmas
[en] Wave propagation
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/75802
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