物理学报2025，Vol.74Issue(7)：171-178,8.DOI:10.7498/aps.74.20241740
尘埃等离子体金属直棘轮中尘埃颗粒的整流
Rectification of dust particles in a dusty plasma metal straight ratchet
摘要
Abstract
Using Feynman ratchet principle,it is possible to rectify the random motion into directed flow of particles in a nonequilibrium environment.In this work,an experimental setup for a dusty plasma metal straight ratchet is designed to create an asymmetric plasma environment along the ratchet channel,achieving controllable rectification of micron-sized dust particles.Monodispersed dust particles can form a directional flow in the ratchet channel,and the transport direction can be precisely controlled by adjusting the discharge power and the gas pressure.Research on the transport of dust particles with varying sizes proves that the rectification effect is universal.To reveal the rectification mechanism of dust particles,a fluid model of plasma is adopted to calculate the two-dimensional distribution of plasma parameters within the ratchet channel.Further research through Langevin simulation shows that dust particles experience ratchet potentials with different asymmetric orientations at different suspension heights within the ratchet channel,leading to different transport directions.The results of this work lays a theoretical and experimental foundation for further realizing the separation of bi-disperse particles in dusty plasma metal straight ratchets.关键词
尘埃等离子体/棘轮/整流Key words
dusty plasma/ratchet/rectification引用本文复制引用
张顺欣,王硕,刘雪,王新占,刘富成,贺亚峰..尘埃等离子体金属直棘轮中尘埃颗粒的整流[J].物理学报,2025,74(7):171-178,8.基金项目
国家自然科学基金(批准号:12275064,12475203)、河北省自然科学基金(批准号:A2024201020)、河北大学科研创新团队(批准号:IT2023B03)和河北大学研究生创新资助项目(批准号:HBU2025BS016,HBU2025BS017)资助的课题. Project supported by the Nation Natural Science Foundation of China(Grant Nos.12275064,12475203),the Natural Science Fundation of Hebei Province,China(Grant No.A2024201020),the Scientific Research and Innovation Team Project of Hebei University,China(Grant No.IT2023B03),and the Post-graduate's Innovation Fund Project of Hebei University,China(Grant Nos.HBU2025BS016,HBU2025BS017). （批准号:12275064,12475203）
