1 Department of Physics, School of Science, Hangzhou Dianzi University, Hangzhou 310016, China; 2 College of Engineering Physics, CAMDT, Shenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology, Shenzhen Technology University, Shenzhen 518118, China; 3 Institute for Fusion Theory and Simulation, Zhejiang University, Hangzhou 310007, China; 4 Theoretical Physics I, Ruhr University, Bochum D-44780, Germany
Abstract Evolution of the charged grains in a two-dimensional dusty plasma under a spatially harmonic external force, in particular, their long-time behaviors after the force has been withdrawn, is studied by using molecular dynamics simulation. Under an external force and a grain-grain interaction force, initially homogeneously distributed grains can reach a quasi-stationary state in the form of a disk crystal. After the external force is withdrawn, the disk moves initially with its size and shape nearly unchanged until it rapidly stops moving, and eventually the disk grain rotates like a vortex. The time needed to reach the final state increases with the strength of the initial external force increasing.
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11975088 and 11705041) and the Natural Science Foundation of Zhejiang Province, China (Grant No. LY15A050001).
Corresponding Authors:
You-Mei Wang
E-mail: ymwang0618@163.com
Cite this article:
Miao Guan(管苗), Zhi-Dong Chen(陈志东), Meng-Die Li(李梦蝶), Zhong-Mao Liu(刘忠茂), You-Mei Wang(汪友梅), and Ming-Yang Yu(郁明阳) Long-time evolution of charged grains in plasma under harmonic external force and after being withdrawn 2022 Chin. Phys. B 31 025201
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