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Springer (part of Springer Nature), Brazilian Journal of Physics, 4b(34), p. 1638-1644
DOI: 10.1590/s0103-97332004000800024
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The dispersion relation for electrostatic fluctuations in weakly inhomogeneous plasmas
Journal article published in 2004 by
Silveira,O J. G.,
O. J. G. Silveira,
L. F. Ziebell 
,
Ziebell,L F.,
R. S. Schneider,
Schneider,R S.,
R. Gaelzer ,
Gaelzer,R
,
Ziebell,L F.,
R. S. Schneider,
Schneider,R S.,
R. Gaelzer ,
Gaelzer,R
This paper is made freely available by the publisher.
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Abstract
We compare and discuss several approximations to the dispersion relation for electrostatic waves in inhomogeneous plasmas, either obtained directly from Poisson's equation, or from the dielectric constant obtained using a dielectric tensor derived using the plane wave approximation, or from the dielectric constant derived using the effective dielectric tensor.