Long-time evolution of charged grains in plasma under harmonic external force and after being withdrawn

doi:10.1088/1674-1056/ac0e27

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plasma under a spatially harmonic external force, in particular, their long-time behaviors after the force has been withdrawn, is studied by using molecular dynamics simulation.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 After the external force is withdrawn, the disk moves initially with its size and shape nearly unchanged until it rapidly stops moving, and eventually the disk grain rotates like a vortex.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.

Keywords: dusty plasma external force long-time behavior molecular dynamics (MD) simulation

Received: 08 April 2021
Revised: 20 June 2021
Accepted manuscript online: 24 June 2021

PACS:	52.27.Lw	(Dusty or complex plasmas; plasma crystals)
	52.65.Yy	(Molecular dynamics methods)
	52.25.Dg	(Plasma kinetic equations)
	52.20.Dq	(Particle orbits)

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and Ming-Yang Yu(郁明阳) Long-time evolution of charged grains in plasma under harmonic external force and after being withdrawn 2022 Chin.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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Long-time evolution of charged grains in plasma under harmonic external force and after being withdrawn

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