Projectile channeling in chain bundle dusty plasma liquids: Wave excitation and projectile-wave interaction

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题名:	Projectile channeling in chain bundle dusty plasma liquids: Wave excitation and projectile-wave interaction
作者:	Chang,MC;Tseng,YP;Lin,I
贡献者:	物理學系
关键词:	CHARGED-PARTICLES;COMPLEX PLASMA;INSTABILITIES;CRYSTALS
日期:	2011
上传时间:	2012-06-11 10:51:17 (UTC+8)
出版者:	國立中央大學
摘要:	The microscopic channeling dynamics of projectiles in subexcitable chain bundle dusty plasma liquids consisting of long chains of negatively charged dusts suspended in low pressure glow discharges is investigated experimentally using fast video-microscopy. The long distance channeling of the projectile in the channel formed by the surrounding dust chain bundles and the excitation of a narrow wake associated with the elliptical motions of the background dusts are demonstrated. In the high projectile speed regime, the drag force due to wake wave excitation increases with the decreasing projectile speed. The excited wave then leads the slowed down projectile after the projectile speed is decreased below the resonant speed of wave excitation. The wave-projectile interaction causes the increasing projectile drag below the resonant speed and the subsequent oscillation around a descending average level, until the projectile settles down to the equilibrium point. Long distance projectile surfing through the resonant crest trapping by the externally excited large amplitude solitary wave is also demonstrated. (C) 2011 American Institute of Physics. [doi:10.1063/1.3568839]
關聯:	PHYSICS OF PLASMAS
显示于类别:	[物理學系] 期刊論文

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