论文标题
未磁化的4组分等离子体中的尘埃离子声波
Dust-Ion-Acoustic Waves in unmagnetized 4-component plasma
论文作者
论文摘要
提出了一项理论研究，用于在未磁化的四组分等离子体中传播灰尘离子声波，包括麦克斯韦负离子，冷移动阳性离子，$κ$分布的电子和带电阳性的灰尘晶粒组成。基于Sagdeev伪电势和相肖像的特征，观察到三种类型的非线性波---孤子，双层和超纤维。存在这种非线性波的条件对等离子体参数高度敏感。在这项研究中获得的结果可能与实验室中的空间等离子体以及超肌半导体设备具有广泛的相关性。
A theoretical study is presented for the propagation of Dust Ion Acoustic Waves in an unmagnetized four-component plasma, consisting of Maxwellian negative ions, cold mobile positive ions, $κ$-distributed electrons and positively charged dust grains. Based on the characteristics of Sagdeev pseudopotential and phase portraits, three types of nonlinear waves are observed --- solitons, double layers and supersolitons. The conditions for the existence of such nonlinear waves are highly sensitive to the plasma parameters. The results obtained in this study may be of wide relevance in the field of space plasma as well as ultrasmall semiconductor devices in the laboratory.
