Correlation buildup during recrystallization in three-dimensional dusty plasma clusters
Correlation buildup during recrystallization in three-dimensional dusty plasma clusters
复制标题
三维尘埃等离子体簇再结晶过程中相关性的建立
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
A. Melzer
中科院分区：
文献类型：
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作者：
A. Schella;M. Mulsow;A. Melzer
对有限三维尘埃云激光加热后的再结晶过程进行了实验研究。提出了与时间相关的库仑耦合参数，表明再结晶从指数冷却阶段开始，其中冷却速度慢于中性气体摩擦的阻尼。随后，耦合参数振荡至平衡状态。发现再结晶实验后大部分团簇状态处于亚稳态。相关性积累的时间演变表明，相关性发生的时间尺度比冷却的时间尺度还要慢。
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.