Mode couplings and resonance instabilities in finite dust chains

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dc.contributor.authorQiao, Ke
dc.contributor.authorKong, Jie
dc.contributor.authorMatthews, Lorin Swint.
dc.contributor.authorHyde, Truell Wayne.
dc.date.accessioned2015-06-15T21:33:08Z
dc.date.available2015-06-15T21:33:08Z
dc.date.issued2015-05-08
dc.description.abstractEmploying a numerical simulation, the normal modes are investigated for finite, one-dimensional horizontal dust chains in complex plasma. Mode couplings induced by the ion flow within the sheath are identified in the mode spectra and the coupling rules are determined. Two types of resonance-induced instabilities are observed, one bidirectional and one unidirectional. Bidirectional instability is found to cause melting of the chain with the melting proceeding via a two-step process which obeys the Lindemann criterion. The relationship between the normal mode spectra observed in finite systems and the wave dispersion relations seen in larger systems was also examined using a dust chain model. For this case, the dispersion relation was obtained through multiplication of the mode spectra matrix by a transition matrix. The resulting dispersion relations exhibit both the general features observed in larger crystals as well as several characteristics unique to finite systems, such as discontinuities and strong energy-density fluctuations.en_US
dc.description.keywordsdusty plasmasen_US
dc.description.keywordsdust chainsen_US
dc.description.keywordsmode spectraen_US
dc.identifier.citationPhysical Review E, 91(5), 053101, May, 2015en_US
dc.identifier.doi10.1103/PhysRevE.91.053101
dc.identifier.urihttp://hdl.handle.net/2104/9400
dc.language.isoenen
dc.publisherAmerican Physical Societyen_US
dc.titleMode couplings and resonance instabilities in finite dust chainsen_US
dc.typeArticleen

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