Measurement of the interaction potential of microspheres in the sheath of a rf discharge

被引：413

作者：

Konopka, U

Morfill, GE

Ratke, L

机构：

[1] Max Planck Inst Extraterr Phys, D-85740 Garching, Germany

[2] DLR, Inst Raumsimulat, D-51147 Cologne, Germany

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.84.891

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The interaction potential of two microspheres that are levitated in the sheath region of a radio frequency (rf) argon discharge is studied experimentally by analyzing their trajectories during head-on collisions. It is shown that the interaction parallel to the sheath boundary can be described by a screened Coulomb potential. Thus, values for an effective charge and a screening length can be obtained. The horizontal part of the interaction potential has been determined for several plasma conditions. There is no evidence for an attractive part in the potential within the accuracy of the present measurements and the given plasma conditions.

引用

页码：891 / 894

页数：4

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