Directional motion of dust particles at different gear structuresin a plasma  

作　　者：Chao-Xing Dai Chao Song Zhi-Xiang Zhou Wen-Tao Sun Zhi-Qiang Guo Fu-Cheng Liu Ya-Feng He 戴超星;宋超;周志向;孙文涛;郭志强;刘富成;贺亚峰(Hebei Key Laboratory of Optic-electronic Information Materials,College of Physics Science and Technology,Hebei University,Baoding 071002,China)

机构地区：[1]Hebei Key Laboratory of Optic-electronic Information Materials,College of Physics Science and Technology,Hebei University,Baoding 071002,China

出　　处：《Chinese Physics B》2020年第2期362-365,共4页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.11975089);the Program for National Defense Science and Technology Innovation Special Zone of China;the Program for Young Top-Notch Talents of Hebei Province of China.

摘　　要：Directional motion of dust particles in a dusty plasma ratcnet is observed experimentally.The dusty plasma ratcnet consists of two concentric gears with asymmetric sawtooth.It is found that the sawtooth number affects the directional motion of dust particles along the saw channel.With the inerease of the sawtooth number,the particle velocity increases firstly and then decreases,and there is an optimum number of the sawtooth which could induce fast rotation of dust particles.The velocities of dust particles change as they are flowing along the saw channel.We also explore the force acting on the dust particle experimentally.Directional motion of dust particles in a dusty plasma ratchet is observed experimentally.The dusty plasma ratchet consists of two concentric gears with asymmetric sawtooth.It is found that the sawtooth number affects the directional motion of dust particles along the saw channel.With the increase of the sawtooth number,the particle velocity increases firstly and then decreases,and there is an optimum number of the sawtooth which could induce fast rotation of dust particles.The velocities of dust particles change as they are flowing along the saw channel.We also explore the force acting on the dust particle experimentally.

关 键 词：DUSTY PLASMA RATCHET 

分 类 号：O53[理学—等离子体物理]