Long-time evolution of charged grains in plasma under harmonic external force and after being withdrawn

doi:10.1088/1674-1056/ac0e27

中国物理B ›› 2022, Vol. 31 ›› Issue (2): 25201-025201.doi: 10.1088/1674-1056/ac0e27

Long-time evolution of charged grains in plasma under harmonic external force and after being withdrawn

Miao Guan(管苗)¹, Zhi-Dong Chen(陈志东)¹, Meng-Die Li(李梦蝶)¹, Zhong-Mao Liu(刘忠茂)¹, You-Mei Wang(汪友梅)^1,†, and Ming-Yang Yu(郁明阳)^2,3,4

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

收稿日期:2021-04-08 修回日期:2021-06-20 接受日期:2021-06-24 出版日期:2022-01-13 发布日期:2022-01-18
通讯作者: You-Mei Wang E-mail:ymwang0618@163.com
基金资助:
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).

Long-time evolution of charged grains in plasma under harmonic external force and after being withdrawn

Miao Guan(管苗)¹, Zhi-Dong Chen(陈志东)¹, Meng-Die Li(李梦蝶)¹, Zhong-Mao Liu(刘忠茂)¹, You-Mei Wang(汪友梅)^1,†, and Ming-Yang Yu(郁明阳)^2,3,4

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

Received:2021-04-08 Revised:2021-06-20 Accepted:2021-06-24 Online:2022-01-13 Published:2022-01-18
Contact: You-Mei Wang E-mail:ymwang0618@163.com
Supported by:
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).

摘要/Abstract

摘要： 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plasma under a spatially harmonic external force, in particular, their long-time behaviors after the force has been withdrawn, is studied by using molecular dynamics simulation.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.

关键词: dusty plasma, external force, long-time behavior, molecular dynamics (MD) simulation

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.

Key words: dusty plasma, external force, long-time behavior, molecular dynamics (MD) simulation

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

52.27.Lw

52.65.Yy (Molecular dynamics methods) 52.25.Dg (Plasma kinetic equations) 52.20.Dq (Particle orbits)

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[J]. 中国物理B, 2022, 31(2): 25201-025201.

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Long-time evolution of charged grains in plasma under harmonic external force and after being withdrawn

Long-time evolution of charged grains in plasma under harmonic external force and after being withdrawn

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