Effect of Second Harmonic on Recurrence of Ion Acoustic Wave

Abstract

The amplitude oscillation of a nonlinearly generated second harmonic wave is studied both experimentally and theoretically. Not only a fundamental but also a small amplitude second harmonic signal is applied to the exciter. The spatial wavepatterns are found to depend on the initial phase of the second harmonic. The amplitude oscillation disappears under certain conditions and the fundamental and second harmonic waves propagate as if they were independent of each other.