Ivlev A V, Morfill G
Max-Planck-Institut für Extraterrestrische Physik, D-85740 Garching, Germany.
Phys Rev E Stat Nonlin Soft Matter Phys. 2001 Jan;63(1 Pt 2):016409. doi: 10.1103/PhysRevE.63.016409. Epub 2000 Dec 22.
Dust lattice (DL) wave modes in a one-dimensional plasma crystal suspended in the plasma sheath are studied. The ion flow in the sheath introduces an anisotropy, in particular "ion wakes" below the crystal particles. This leads to two types of transverse wave mode. It is shown that the "horizontal transverse mode" remains independent, but the "vertical transverse mode" and the longitudinal mode are coupled due to the particle-wake interaction. The coupling can drive an instability of the modes close to the point where their branches intersect. In addition, the particle-wake interaction might decrease the frequencies of the DL modes considerably.
研究了悬浮在等离子体鞘层中的一维等离子体晶体中的尘埃晶格（DL）波模式。鞘层中的离子流引入了一种各向异性，特别是在晶体颗粒下方形成了“离子尾迹”。这导致了两种类型的横向波模式。结果表明，“水平横向模式”保持独立，但“垂直横向模式”和纵向模式由于颗粒 - 尾迹相互作用而耦合。这种耦合可以在模式分支相交点附近驱动模式的不稳定性。此外，颗粒 - 尾迹相互作用可能会显著降低DL模式的频率。
