Solitary wake field microdynamics of the pulsed laser induced microbubbles in three-dimensional dusty plasma liquids

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/38975

Title:	Solitary wake field microdynamics of the pulsed laser induced microbubbles in three-dimensional dusty plasma liquids
Authors:	Tsai,CY;Teng,LW;Chang,MC;Tseng,YP;I,L
Contributors:	物理研究所
Keywords:	SUBEXCITABLE MEDIA;WAVES;INSTABILITIES
Date:	2009
Issue Date:	2010-07-08 14:01:00 (UTC+8)
Publisher:	中央大學
Abstract:	The Eulerian/Lagrangian dynamics in the narrow wake field of the dusty plasma bubble is explored by directly tracking dust motion at the microscopic level. The bubble is induced by the focused laser pulse ablation in three-dimensional quiescent dusty plasma liquids operated in the pressure higher than the critical pressure for the self-excitation of dust acoustic wave by the downward ion wind. It is found that, after bubble expansion ceases, the collective excitation maintains its width and travels downward as a solitary wave, led by an ultrasonic rarefaction front contributed by the dust motion below the lower boundary, and trailed by the few compressional crests with descending crest heights and speeds in the narrow wake, under the symmetry breaking by the downward ion flow. The quick damping of the waves propagating along other directions leads to a narrow wake. Increasing the background pressure causes the more isotropic collapsing of the bubble without wake field oscillation. The role played by dust motion on interacting with and sustaining the wake field evolution is identified and discussed.
Relation:	PHYSICS OF PLASMAS
Appears in Collections:	[Graduate Institute of Physics] journal & Dissertation

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