Abstract.
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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Received: 9 July 2004, Published online: 21 September 2004
PACS:
52.35.-g Waves, oscillations, and instabilities in plasmas and intense beams
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Gill, T.S., Bala, P., Kaur, H. et al. Ion-acoustic solitons and double-layers in a plasma consisting of positive and negative ions with non-thermal electrons. Eur. Phys. J. D 31, 91–100 (2004). https://doi.org/10.1140/epjd/e2004-00121-4
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DOI: https://doi.org/10.1140/epjd/e2004-00121-4