Correlation buildup during recrystallization in three-dimensional dusty plasma clusters

The recrystallization process of finite three-dimensional dust clouds after laser heating is studied experimentally. The time-dependent Coulomb coupling parameter is presented, showing that the recrystallization starts with an exponential cooling phase where cooling is slower than damping by the neu...

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Bibliographic Details
Published in:Physics of plasmas 2014-05, Vol.21 (5)
Main Authors: Schella, André, Mulsow, Matthias, Melzer, André
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Cooling
Correlation
CORRELATIONS
Coupling
DAMPING
Dust
DUSTS
Dusty plasmas
Laser beam heating
LASER-RADIATION HEATING
Metastable state
METASTABLE STATES
Neutral gases
Parameters
PLASMA
RECRYSTALLIZATION
THREE-DIMENSIONAL CALCULATIONS
TIME DEPENDENCE
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Summary:The recrystallization process of finite three-dimensional dust clouds after laser heating is studied experimentally. The time-dependent Coulomb coupling parameter is presented, showing that the recrystallization starts with an exponential cooling phase where cooling is slower than damping by the neutral gas friction. At later times, the coupling parameter oscillates into equilibrium. It is found that a large fraction of cluster states after recrystallization experiments is in metastable states. The temporal evolution of the correlation buildup shows that correlation occurs on even slower time scale than cooling.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.4875750