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Title: | Ion- and electron-acoustic solitons and double layers in multi-component space plasmas |
Authors: | Lakhina, G.S. Singh, S.V. Kakad, Amar |
Keywords: | Electrostatic solitary waves Solitons and double layers in space plasmas Nonlinear ion- and electron-acoustic waves Space plasmas Sagdeev pseudo-potential techniques Poisson equation Multi-fluid equations Magnetosphere |
Issue Date: | 2011 |
Citation: | Adv. Sp. Res., v.47, p.1558-1567, 2011, doi: 10.1016/j.asr.2010.12.013 |
Abstract: | A general model for the ion- and electron-acoustic solitons and double layers in a multi-component unmagnetized plasma consisting of background electrons, counter-streaming electron beams and ions is discussed. The model is based on the multi-fluid equations and the Poisson equation, and uses the Sagdeev pseudo-potential techniques. For identical counter-streaming electron beams and depending upon the plasma parameters, three types of solutions, namely, ion-acoustic, slow and fast electron-acoustic soliton/double layer, are possible. Generally, the ion acoustic solitons have positive potentials, slow-electron acoustic solitons have negative potentials and fast electron-acoustic solitons and double layers can have either positive or negative potentials depending on the core electron density. As beam speed is increased, first ion-acoustic and then slow electron-acoustic solitons disappear. At large beam speed, only fast electron-acoustic solitons/double layers survive. The results may be relevant to the observations of the electrostatic solitary waves (ESWs) observed in the Earth’s magnetosphere. |
URI: | http://localhost:8080/xmlui/handle/123456789/655 |
Appears in Collections: | UAS_Reprints |
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LakhinaGS_SinghSV_KakadAP_AdvancesSpaceResearch_2011.pdf Restricted Access | 454.18 kB | Adobe PDF | View/Open Request a copy |
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