PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Directional motion of dust particles at different gear structuresin a plasma |
Chao-Xing Dai(戴超星), Chao Song(宋超), Zhi-Xiang Zhou(周志向), Wen-Tao Sun(孙文涛), Zhi-Qiang Guo(郭志强), Fu-Cheng Liu(刘富成), Ya-Feng He(贺亚峰) |
Hebei Key Laboratory of Optic-electronic Information Materials, College of Physics Science and Technology, Hebei University, Baoding 071002, China |
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Abstract 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.
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Received: 21 August 2019
Revised: 29 October 2019
Accepted manuscript online:
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PACS:
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52.27.Lw
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(Dusty or complex plasmas; plasma crystals)
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Fund: 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, and the Program for Young Top-Notch Talents of Hebei Province of China. |
Corresponding Authors:
Fu-Cheng Liu, Ya-Feng He
E-mail: hdlfc@hbu.edu.cn;heyf@hbu.edu.cn
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Cite this article:
Chao-Xing Dai(戴超星), Chao Song(宋超), Zhi-Xiang Zhou(周志向), Wen-Tao Sun(孙文涛), Zhi-Qiang Guo(郭志强), Fu-Cheng Liu(刘富成), Ya-Feng He(贺亚峰) Directional motion of dust particles at different gear structuresin a plasma 2020 Chin. Phys. B 29 025203
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