Global dust density in two-dimensional complex plasma  

作　　者：赵逸真 刘松芬 孔伟 杨芳 Yi-Zhen Zhao;Song-Fen Liu;Wei Kong;Fang Yang(School of Physics,Nankai University,Tianjin 300071,China;College of Science,Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]School of Physics,Nankai University,Tianjin 300071,China [2]College of Science,Civil Aviation University of China,Tianjin 300300,China

出　　处：《Chinese Physics B》2024年第6期445-450,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos. 12275354 and 11805272);the Civil Aviation University of China (Grant No. 3122023PT08)。

摘　　要：The driven-dissipative Langevin dynamics simulation is used to produce a two-dimensional(2D) dense cloud, which is composed of charged dust particles trapped in a quadratic potential. A 2D mesh grid is built to analyze the center-to-wall dust density. It is found that the local dust density in the outer region relative to that of the inner region is more nonuniform,being consistent with the feature of quadratic potential. The dependences of the global dust density on equilibrium temperature, particle size, confinement strength, and confinement shape are investigated. It is found that the particle size, the confinement strength, and the confinement shape strongly affect the global dust density, while the equilibrium temperature plays a minor effect on it. In the direction where there is a stronger confinement, the dust density gradient is bigger.

关 键 词：dust particles quadratic potential two-dimensional mesh grid 

分 类 号：O53[理学—等离子体物理]