PLASMA CRYSTAL - COULOMB CRYSTALLIZATION IN A DUSTY PLASMA

被引：1545

作者：

THOMAS, H

MORFILL, GE

DEMMEL, V

GOREE, J

FEUERBACHER, B

MOHLMANN, D

机构：

[1] UNIV IOWA,DEPT PHYS & ASTRON,IOWA CITY,IA 52242

[2] DLR,INST RAUMSIMULAT,D-51140 COLOGNE,GERMANY

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.73.652

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页码：652 / 655

页数：4

共 30 条

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