Detuning effect of negative ions on ion-acoustic-decay instabilities of electromagnetic waves

Abstract

It is proved analytically in the fluid-Maxwell theory of plasma that negative ions can stabilize the ion-acoustic-decay instability of electromagnetic waves by changing and making off-resonant the electron plasma wave frequency. The number density ratio of negative to positive ions that is needed to suppress the instability scales with the square root of the pump intensity difference from the minimum threshold.

Effects of ion streaming and propagation direction on ion-acoustic solitary waves

“…16 Several effects such as density gradient, ion temperature, etc., on nonlinear ion-acoustic waves have been studied in the presence of third species ͑dust͒, which modify the results as obtained in the case of electron ion plasma. [17][18][19][20] There are many situations where a relative motion between different plasma species can occur. Therefore it seems necessary to look for the effects of ion streaming on the nonlinear ion-acoustic solitary structures.…”