含负离子尘埃等离子体中非绝热尘埃电荷起伏对尘埃声波调制不稳定的影响（英文）

The effects of nonadiabatic dust charge variation on the modulational instability of dust acoustic wave in dusty plasmas with negative ions

研究了包含波尔兹曼分布的电子、负离子、正离子以及带正电尘埃颗粒的等离子体中非绝热尘埃电荷起伏对非线性尘埃声波调制不稳定的影响。利用约化摄动方法得到了修正的非线性薛定谔方程。结果表明尘埃电荷的非绝热起伏、负离子的温度、负离子的比重等物理参量对尘埃声波的调制不稳定有显著的影响。

The effects of nonadiabatic dust charge fluctuation on the modulational instability of non- linear dust acoustic （DA） waves were investigated in dusty plasmas consisting of Bohzmann-distributed e- lectrons, negative ions, positive ions as well as positively charged dust grain. By using the reductive per- turbation technique, a modified nonlinear Schr^dinger （mNLS） equation was derived. It shows that the modulation properties of the DA waves were strongly affected by the nonadiabatic dust charge variation, the temperature of the negative ions and the ratio of negative ions number density to the electrons number density.