Journal
EUROPEAN PHYSICAL JOURNAL D
Volume 31, Issue 1, Pages 91-100Publisher
SPRINGER
DOI: 10.1140/epjd/e2004-00121-4
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In this research paper, the authors have studied the properties of ion-acoustic solitons and double-layers in a plasma consisting of warm positive and negative ions with different concentration of masses, charged states and non-thermal electrons using small amplitude approximation. Reductive perturbation method is used to derive KdV and m- KdV equations. Existence of ion-acoustic solitons and double-layer is explored over a wide range of parameter space. The role of non-thermal electrons characterized by finite beta is investigated. It is observed that for a particular value of beta, there is a transition from compressive to rarefactive solitons. However, when beta is increased beyond a critical value, no double-layers are obtained. The significance of relative ion masses is also investigated.
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