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A parametric study of the influence of non-thermal ions on linear dust-acoustic waves in an unmagnetized dusty plasma

Published online by Cambridge University Press:  10 May 2005

S. K. MAHARAJ
Affiliation:
Hermanus Magnetic Observatory, Hermanus 7200, South Africa
S. R. PILLAY
Affiliation:
University of KwaZulu-Natal, Durban 4041, South Africa
R. BHARUTHRAM
Affiliation:
University of KwaZulu-Natal, Durban 4041, South Africa
S. V. SINGH
Affiliation:
Indian Institute of Geomagnetism, Plot No. 5, Sector-18, New Panvel (W), Navi Mumbai, 410218, India
G. S. LAKHINA
Affiliation:
Indian Institute of Geomagnetism, Plot No. 5, Sector-18, New Panvel (W), Navi Mumbai, 410218, India

Abstract

The influence of non-thermal ions on linear dust-acoustic waves is studied in an unmagnetized plasma consisting of ions which have a non-thermal velocity distribution, Boltzmann-distributed electrons and streaming dust particles. A detailed examination is conducted of the dependence of the real frequency and growth rate of the excited instability on the dust drift speed, temperature, particle densities and the parameter $\alpha$ that determines the non-thermal nature of the energetic ions. Comparisons with approximate analytical solutions are also made.

Type
Papers
Copyright
2005 Cambridge University Press

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