Electrostatic waves in dusty plasmas with variable charge on dust particles
- Instituto de Astronomia, Geofisica e Ciencias Atmosfericas, Universidade de Sao Paulo, Rua do Matao 1226, Cidade Universitaria, CEP: 05508-900, Sao Paulo, SP (Brazil)
- Instituto de Fisica, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, CEP: 91501-970, Porto Alegre, RS (Brazil)
In this work we present results obtained using a kinetic approach for parallel propagation of waves in a homogeneous magnetized dusty plasma. In this magnetized plasma we consider embedded spherical dust grains with constant radius and variable charge. We consider that the principal process of dust charging is by capture of electrons and ions of the plasma, and use a cross-section derived from the orbital motion limited theory to describe this process. We concentrate on electrostatic waves and obtain the dispersion relation, which is applied to Langmuir oscillations, taking into account those effects due to charge fluctuation which do not contain terms with the derivative of the charging cross-section, and using an approximation for the collision frequency between plasma particles and dust particles. We also analyse the competition between Landau damping and the damping that results from the electric charge variation of the dust particles.
- OSTI ID:
- 20719378
- Journal Information:
- AIP Conference Proceedings, Vol. 784, Issue 1; Conference: International conference on magnetic fields in the universe: From laboratory and stars to primordial structures, Angra dos Reis (Brazil), 28 Nov - 3 Dec 2004; Other Information: DOI: 10.1063/1.2077213; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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