Wave-particle dynamics of waveform and defect evolutions in undulated nonlinear self-excited dust acoustic waves

Jun Yi Tsai, Ya Yi Tsai, I. Lin

研究成果: 雜誌貢獻期刊論文同行評審

4 引文 斯高帕斯(Scopus)

摘要

The wave-particle dynamics for the evolutions of defects and surrounding pitchfork type waveforms of a weakly disordered self-excited dust acoustic wave is experimentally investigated in an rf dusty plasma system. Particle trajectories are tracked and correlated with waveform evolution to construct an Eulerian-Lagrangian wave-particle dynamical picture. It is found that the local accumulation and depletion of particles in the wave crest and rear, respectively, determines the local crest speed, and the growth and decay of the local crest height, which in turn determine the waveform evolution. The local crest height and the focusing and defocusing of particle trajectories due to the transverse force fields from the tilted wave crest and the non-uniform crest height along the wave crest are the key factors to determine the above particle accumulation and depletion. It explains the observations such as the lower speed of smaller crests, the straightening of the leading front of the pitchfork waveform associated with the transverse motion of defect to the open side, and the vertical defect gliding in the wave frame through the detachment of the strongly kinked pitchfork branch followed by its reconnection with the trailing crest.

原文???core.languages.en_GB???
文章編號013701
期刊Physics of Plasmas
22
發行號1
DOIs
出版狀態已出版 - 1 1月 2015

指紋

深入研究「Wave-particle dynamics of waveform and defect evolutions in undulated nonlinear self-excited dust acoustic waves」主題。共同形成了獨特的指紋。

引用此