Central collisions of charged dust particles in a plasma

被引:109
作者
Konopka, U [1 ]
Ratke, L [1 ]
Thomas, HM [1 ]
机构
[1] MAX PLANCK INST EXTRATERR PHYS,D-85740 GARCHING,GERMANY
关键词
D O I
10.1103/PhysRevLett.79.1269
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Elastic dust particle particle interaction in an rf plasma provides a charge measurement method independent of the knowledge of plasma parameters. Assuming a screened Coulomb potential surrounding each particle with a constant charge at fixed plasma conditions, the charge and the screening length can be calculated from the trajectories of two colliding particles. With this method, we determine the charge and screening length of dust particles in the sheath of an rf discharge. The method can also be used to determine plasma parameters taking the dust particles as local probes.
引用
收藏
页码:1269 / 1272
页数:4
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