中国物理B ›› 2022, Vol. 31 ›› Issue (6): 65202-065202.doi: 10.1088/1674-1056/ac46c4

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Quantitative simulations of ratchet potential in a dusty plasma ratchet

Shuo Wang(王硕), Ning Zhang(张宁), Shun-Xin Zhang(张顺欣), Miao Tian(田淼), Ya-Wen Cai(蔡雅文), Wei-Li Fan(范伟丽), Fu-Cheng Liu(刘富成)†, and Ya-Feng He(贺亚峰)‡   

  1. College of Physics Science and Technology, Institute for Life Sciences and Green Development, Hebei University, Baoding 071002, China
  • 收稿日期:2021-11-23 修回日期:2021-12-28 接受日期:2021-12-29 出版日期:2022-05-17 发布日期:2022-05-17
  • 通讯作者: Fu-Cheng Liu, Ya-Feng He E-mail:hdlfc@hbu.edu.cn;heyf@hbu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11975089 and 11875014), the Interdisciplinary Research Program of Natural Science of Hebei University (Grant No. DXK202010), and the Hebei Natural Science Fund (Grant Nos. A2021201003 and A2021201010).

Quantitative simulations of ratchet potential in a dusty plasma ratchet

Shuo Wang(王硕), Ning Zhang(张宁), Shun-Xin Zhang(张顺欣), Miao Tian(田淼), Ya-Wen Cai(蔡雅文), Wei-Li Fan(范伟丽), Fu-Cheng Liu(刘富成)†, and Ya-Feng He(贺亚峰)‡   

  1. College of Physics Science and Technology, Institute for Life Sciences and Green Development, Hebei University, Baoding 071002, China
  • Received:2021-11-23 Revised:2021-12-28 Accepted:2021-12-29 Online:2022-05-17 Published:2022-05-17
  • Contact: Fu-Cheng Liu, Ya-Feng He E-mail:hdlfc@hbu.edu.cn;heyf@hbu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11975089 and 11875014), the Interdisciplinary Research Program of Natural Science of Hebei University (Grant No. DXK202010), and the Hebei Natural Science Fund (Grant Nos. A2021201003 and A2021201010).

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摘要： Using a dusty plasma ratchet, one can realize the rectification of charged dust particle in a plasma. To obtain the ratchet potential dominating the rectification, here we perform quantitative simulations based on a two-dimensional fluid model of capacitively coupled plasma. Plasma parameters are firstly calculated in two typical cross sections of the dusty plasma ratchet which cut vertically the saw channel at different azimuthal positions. The balance positions of charged dust particle in the two cross sections then can be found exactly. The electric potentials at the two balance positions have different values. Using interpolation in term of a double-sine function from previous experimental measurement, an asymmetrical ratchet potential along the saw channel is finally obtained. The asymmetrical orientation of the ratchet potential depends on discharge conditions. Quantitative simulations further reproduce our previous experimental phenomena such as the rectification of dust particle in the dusty plasma ratchet.

关键词: dusty plasma, ratchet potential

Abstract: Using a dusty plasma ratchet, one can realize the rectification of charged dust particle in a plasma. To obtain the ratchet potential dominating the rectification, here we perform quantitative simulations based on a two-dimensional fluid model of capacitively coupled plasma. Plasma parameters are firstly calculated in two typical cross sections of the dusty plasma ratchet which cut vertically the saw channel at different azimuthal positions. The balance positions of charged dust particle in the two cross sections then can be found exactly. The electric potentials at the two balance positions have different values. Using interpolation in term of a double-sine function from previous experimental measurement, an asymmetrical ratchet potential along the saw channel is finally obtained. The asymmetrical orientation of the ratchet potential depends on discharge conditions. Quantitative simulations further reproduce our previous experimental phenomena such as the rectification of dust particle in the dusty plasma ratchet.

Key words: dusty plasma, ratchet potential

中图分类号:  (Dusty or complex plasmas; plasma crystals)

  • 52.27.Lw
52.27.Gr (Strongly-coupled plasmas) 52.65.Kj (Magnetohydrodynamic and fluid equation)