PLASMA CRYSTAL - COULOMB CRYSTALLIZATION IN A DUSTY PLASMA
PLASMA CRYSTAL - COULOMB CRYSTALLIZATION IN A DUSTY PLASMA
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DOI：
10.1103/physrevlett.73.652
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发表时间：
1994-08-01
影响因子：
8.6
通讯作者：
MOHLMANN, D
中科院分区：
文献类型：
--
作者：
THOMAS, H;MORFILL, GE;MOHLMANN, D
在等离子体中观察到固体颗粒的宏观库仑晶体。7微米“尘埃”粒子云的图像显示了六边形晶体结构，这些粒子在弱离子化的氩等离子体中带电并悬浮。这种晶体肉眼可见。粒子被中性气体冷却到310 K，其电荷> 9800 e，对应库仑耦合参数Gamma > 20700。对于这样一个大的伽马值，强耦合等离子体理论预测，粒子应该组织在库仑固体，与我们的观察一致。
A macroscopic Coulomb crystal of solid particles in a plasma has been observed. Images of a cloud of 7-mum ''dust'' particles, which are charged and levitated in a weakly ionized argon plasma, reveal a hexagonal crystal structure. The crystal is visible to the unaided eye. The particles are cooled by neutral gas to 310 K, and their charge is >9800e, corresponding to a Coulomb coupling parameter GAMMA > 20 700. For such a large GAMMA value, strongly coupled plasma theory predicts that the particles should organize in a Coulomb solid, in agreement with our observations.