Quantitative simulations of ratchet potential in a dusty plasma ratchet  

作　　者：Shuo Wang Ning Zhang Shun-Xin Zhang Miao Tian Ya-Wen Cai Wei-Li Fan Fu-Cheng Liu Ya-Feng He 王硕;张宁;张顺欣;田淼;蔡雅文;范伟丽;刘富成;贺亚峰(College of Physics Science and Technology,Institute for Life Sciences and Green Development,Hebei University,Baoding 071002,China)

机构地区：[1]College of Physics Science and Technology,Institute for Life Sciences and Green Development,Hebei University,Baoding 071002,China

出　　处：《Chinese Physics B》2022年第6期518-521,共4页中国物理B（英文版）

基　　金：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);the Hebei Natural Science Fund(Grant Nos.A2021201003 and A2021201010)。

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 

分 类 号：O53[理学—等离子体物理]