Diagnostics of the electronegative plasma sheath at low pressures using microparticles

被引：48

作者：

Annaratone, BM ^{[1
]}

Antonova, T ^{[1
]}

Thomas, HM ^{[1
]}

Morfill, GE ^{[1
]}

机构：

[1] Max Planck Inst Extraterr Phys, Ctr Interdisciplinary Plasma Sci, D-85740 Garching, Germany

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.93.185001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Levitated particles are a new powerful diagnostic of the midplasma sheath region. They can reveal features undetectable either to plasma or to surface measurements. The equilibrium position of microparticles suspended in an oxygen plasma sheath, together with a model of the levitation force and Langmuir probe measurements, gives evidence of secondary electropositive plasmas in the already established plasma sheath, in the range of parameters where the modified Bohm criterion breaks down into multiple solutions.

引用

页码：185001 / 1

页数：4

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