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Localized coherent nonlinear wave structures in dusty plasma with non-thermal ions

Published online by Cambridge University Press:  01 December 2007

TARSEM SINGH GILL
Affiliation:
Department of Physics, Guru Nanak Dev University, Amritsar–143005, India (nspst99@yahoo.com)
CHANCHAL BEDI
Affiliation:
Department of Physics, Guru Nanak Dev University, Amritsar–143005, India (nspst99@yahoo.com)
NARESHPAL SINGH SAINI
Affiliation:
Department of Physics, Guru Nanak Dev University, Amritsar–143005, India (nspst99@yahoo.com)
HARVINDER KAUR
Affiliation:
Department of Physics, Khalsa College, Amritsar–143002, India
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Abstract

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In the present research paper, the characteristics of dust-acoustic solitary waves (DASWs) and double layers (DLs) are studied. Ions are treated as non-thermal and variable dust charge is considered. The Korteweg–de Vries equation is derived using a reductive perturbation method. It is noticed that compressive solitons are obtained up to a certain range of relative density δ (=ni0/ne0) beyond which rarefactive solitons are observed. The study is further extended to investigate the possibility of DLs. Only compressive DLs are permissible. Both DASWs and DLs are sensitive to variation of the non-thermal parameter.

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Papers
Copyright
Copyright © Cambridge University Press 2007