Laser-excited waves in a plasma crystal

被引：13
|
作者：
Piel, A [1 ]
Homann, A [1 ]
Melzer, A [1 ]
机构：
[1] Univ Kiel, Inst Expt & Angew Phys, D-24098 Kiel, Germany
来源：
PLASMA PHYSICS AND CONTROLLED FUSION | 1999年 / 41卷
关键词：
D O I：
10.1088/0741-3335/41/3A/038
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
The radiation pressure of a chopped laser beam is used to excite low-frequency (f = 0.4-5 Hz) waves in plasma crystals. The first system studied is a linear chain of spherical plastic particles of 9.47 mu m diameter. The second system is a single-layer crystal with hexagonal structure made of the same kind of particles. The measured dispersion and damping of longitudinal compressional waves is compared with a model for dust lattice waves in a system of particles interacting by Yukawa-type potentials. From the best fit the shielding factor is determined. The finding that the measured shielding length is comparable with the interparticle distance is supported by Monte Carlo simulations.
引用
收藏
页码：A453 / A461
页数：9
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