Article (Scientific journals)
Ion- and dust-acoustic solitons in dusty plasmas: Existence conditions for positive and negative potential solutions
Verheest, F.; Cattaert, Tom; Hellberg, M. A.
2005In Physics of Plasmas, 12 (8), p. 8
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Keywords :
ELECTROSTATIC SOLITONS; WAVES
Abstract :
[en] The usual description of dust-modified ion-acoustic and dust-acoustic solitons in plasmas containing negative dust is in terms of Boltzmann distributions for the hotter species. In the dust-modified ion-acoustic regime, besides positive potential solitons, negative structures can also be generated, for electrons with a polytropic index gamma(e)not equal 1, as well as for Boltzmann electrons, subject to conditions that are not too stringent. These general conditions were previously either ignored or given for weakly nonlinear solutions only. In the dust-acoustic domain in plasmas with negatively charged dust, however, only negative potential solitons can occur, even when the lighter species have non-Boltzmann distributions. For Boltzmann electrons only an infinite dust compression limits the soliton amplitudes and corresponding Mach numbers, whereas for gamma(e)not equal 1, the electron density, too, can be a limiting factor for the existence domain of such solitons. (c) 2005 American Institute of Physics.
Disciplines :
Physics
Author, co-author :
Verheest, F.
Cattaert, Tom ;  Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Bioinformatique
Hellberg, M. A.
Language :
English
Title :
Ion- and dust-acoustic solitons in dusty plasmas: Existence conditions for positive and negative potential solutions
Publication date :
2005
Journal title :
Physics of Plasmas
ISSN :
1070-664X
eISSN :
1089-7674
Publisher :
American Institute of Physics
Volume :
12
Issue :
8
Pages :
8
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 24 December 2009

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