Measurement and modeling of particle spacing in strongly coupled dusty plasmas

被引：4

作者：

Murillo, MS ^{[1
]}

Snyder, HR ^{[1
]}

机构：

[1] Univ Calif Los Alamos Natl Lab, Plasma Phys Applicat Grp XPA, Los Alamos, NM 87545 USA

来源：

FRONTIERS IN DUSTY PLASMAS | 2000年

关键词：

D O I：

10.1016/B978-044450398-5/50097-X

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Vertical strings of dust grains were studied using a two-dimensional array of grains in a rf Ar plasma in a two-phase experiment. First, the sheath was characterized by fitting a sheath model to single grain behavior and Langmuir probe measurements. Then, the intergrain spacing was measured over a range of powers for spherical glass grains of diameter 10.4 mu m. A one-dimensional energy model for the arrays which includes the sheath model, gravity, and all intergrain interactions is compared with the data. Various asymmetric potentials were employed to account for possible dipolar effects. It is shown that the bulk plasma temperature greatly exceeds the effective temperature (defined in terms of the charging equation applicable in the bulk plasma) in the sheath and that existing interaction potential models do not agree with the data.

引用

页码：559 / 563

页数：5