Competition of Weakly Collisional and Neighboring Wave Effects for the Destruction of Amplitude Oscillations

摘要

The destruction mechanism of the amplitude oscillation in the system of a cold beam and a weakly collisional plasma are examined. The amplitude oscillation can be destroyed either by the weak collision effects or by the effects of the neighboring waves of the most unstable mode. Either of them competes with another in playing a decisive role for the destruction. If an expansion parameter s = ((N sub(b) v sub(b)sup(2))/(6n sub(p) v sub(t)sup(2)))sup(1/3) is constant, the system becomes stable for the growth of the neighboring waves, as the beam velocity increases. (Atomindex citation 11:536846)