Research Article

Ion-Acoustic Instabilities in a Multi-Ion Plasma

Figure 8

Plot of frequency versus wave vector . The panel at the top is for the fast wave ( ; , ) of Figure 1: curve (a) is for the case when there are no heavier ions ( , ) while curve (b) depicts the situation when negatively charged oxygen is also added ( , , and ). The lower panel is for the slow wave ( ; , ) of Figure 1: curve (c) is for the case where only the lighter ions are present ( ,   ) and curve (d) depicts the situation when is also added ( , , and ). Other relevant parameters are the same as in Figure 1.
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