Influence of gas pressure on the pattern evolutions of dust clusters and fractals in a dusty plasma system

doi:10.1088/1009-1963/13/11/023

中国物理B ›› 2004, Vol. 13 ›› Issue (11): 1896-1901.doi: 10.1088/1009-1963/13/11/023

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇下一篇

Influence of gas pressure on the pattern evolutions of dust clusters and fractals in a dusty plasma system

黄峰, 叶茂福, 王龙, 江南

Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China

收稿日期:2003-11-03 修回日期:2004-06-17 出版日期:2005-06-20 发布日期:2005-06-20

Influence of gas pressure on the pattern evolutions of dust clusters and fractals in a dusty plasma system

Huang Feng (黄峰), Ye Mao-Fu (叶茂福), Wang Long (王龙), Jiang Nan (江南)

Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China

Received:2003-11-03 Revised:2004-06-17 Online:2005-06-20 Published:2005-06-20

摘要/Abstract

摘要： Dusty plasma has been produced through chemical reaction in a capacitively coupled radio frequency (rf) discharge system. Dust clusters with a few particles and dust fractals are observed. As gas pressure is increased, the suspended height of dust particles descends and the average interparticle distance decreases accordingly. The influence of gas pressure on the pattern evolutions is investigated. Dust clusters or fractals not only can evolve regularly on a horizontal plane, but also can evolve from a horizontal plane to a vertical line array. Under appropriate conditions, the evolutions are reversible. When the evolution is from a symmetrical pattern with a centre particle to another pattern, the centre particle will first show its unsteadiness.

Abstract: Dusty plasma has been produced through chemical reaction in a capacitively coupled radio frequency (rf) discharge system. Dust clusters with a few particles and dust fractals are observed. As gas pressure is increased, the suspended height of dust particles descends and the average interparticle distance decreases accordingly. The influence of gas pressure on the pattern evolutions is investigated. Dust clusters or fractals not only can evolve regularly on a horizontal plane, but also can evolve from a horizontal plane to a vertical line array. Under appropriate conditions, the evolutions are reversible. When the evolution is from a symmetrical pattern with a centre particle to another pattern, the centre particle will first show its unsteadiness.

Key words: dusty plasma, pressure, pattern evolution

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

52.27.Lw

52.80.Pi (High-frequency and RF discharges) 05.45.Df (Fractals) 82.33.Xj (Plasma reactions (including flowing afterglow and electric discharges))

黄峰, 叶茂福, 王龙, 江南. Influence of gas pressure on the pattern evolutions of dust clusters and fractals in a dusty plasma system[J]. 中国物理B, 2004, 13(11): 1896-1901.

Huang Feng (黄峰), Ye Mao-Fu (叶茂福), Wang Long (王龙), Jiang Nan (江南). Influence of gas pressure on the pattern evolutions of dust clusters and fractals in a dusty plasma system[J]. Chinese Physics, 2004, 13(11): 1896-1901.

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Influence of gas pressure on the pattern evolutions of dust clusters and fractals in a dusty plasma system

Influence of gas pressure on the pattern evolutions of dust clusters and fractals in a dusty plasma system

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