Photoelectric charging of dust particles in vacuum

被引：117

作者：

Sickafoose, AA ^{[1
]}

Colwell, JE ^{[1
]}

Horányi, M ^{[1
]}

Robertson, S ^{[1
]}

机构：

[1] Univ Colorado, Atmospher & Space Phys Lab, Boulder, CO 80309 USA

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.84.6034

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Photoelectric charging measurements are presented of dust grains in vacuum for isolated grains and for grains near a photoemissive surface. Isolated grains reach a positive-equilibrium floating potential, dependent upon the work function of the particle, which causes the emitted electrons to be returned. Grains dropped past a photoemitting surface reach a negative floating potential for which the sum of the emitted and collected currents is zero. The particles tested are 90-106 mu m in diameter and are composed of Zn, Cu, graphite, and glass.

引用

页码：6034 / 6037

页数：4

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