Instability of dust particles in a Coulomb crystal due to delayed charging

被引：165

作者：

Nunomura, S ^{[1
]}

Misawa, T ^{[1
]}

Ohno, N ^{[1
]}

Takamura, S ^{[1
]}

机构：

[1] Nagoya Univ, Grad Sch Engn, Dept Energy Engn & Sci, Nagoya, Aichi 4648603, Japan

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.83.1970

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A self-excited vertical oscillation of dust particles in a Coulomb crystal has been observed. It occurs near the plasma-sheath boundary of a de plasma operated at a low plasma density and gas pressure. The excitation of this spontaneous oscillation is attributed to the finite charging time of particles. As particles move, their charge varies with the local plasma conditions, but with a delay due to the charging time. As particles traverse the vertical electric potential gradient in the sheath, they gain energy. A model of this mechanism is developed to predict the instability threshold and the energy gain.

引用

页码：1970 / 1973

页数：4

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