Destabilization of the m=1 diocotron mode in non-neutral plasmas

被引：18

作者：

Finn, JM ^{[1
]}

del-Castillo-Negrete, D

Barnes, DC

机构：

[1] Univ Calif Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA

[2] Univ Calif Los Alamos Natl Lab, Appl Theoret & Computat Div, Los Alamos, NM 87545 USA

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.84.2401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The theory for a Penning-Malmberg trap predicts m = 1 diocotron stability. However, experiments with hollow profiles show robust exponential growth. We propose a new mechanism of destabilization of this mode, involving parallel compression due to end curvature. The results are in good agreement with the experiments. The resulting modified drift-Poisson equations are analogous to the geophysical shallow water equations, and conservation of line integrated density corresponds to that of potential vorticity. This analogy predicts Rossby waves in non-neutral plasmas and an m = 1 instability in fluids.

引用

页码：2401 / 2404

页数：4

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