ION RESONANCE INSTABILITY IN GROSSLY NONNEUTRAL PLASMAS.
ION RESONANCE INSTABILITY IN GROSSLY NONNEUTRAL PLASMAS.
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严重非中性等离子体中的离子共振不稳定性。
DOI：
10.1063/1.1692404
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发表时间：
1969
影响因子：
4.6
通讯作者：
O. Buneman
中科院分区：
文献类型：
--
作者：
R. Levy;J. Daugherty;O. Buneman
在某些情况下，向原本稳定的电子云中加入一定比例的离子会导致不稳定。详细讨论了低密度（q = ωp2/ωc2≪1）电子云的情况，其中电子运动可以用E + ve×B = 0来描述。不稳定性发生的条件是，未受扰动的离子轨道（其特征是穿过整个电子云）的频率应该接近可以在电子云上传播的二极管波的频率。这个条件等价于具有单位数量级的比值Zme/miq，并且与离子密度无关。当存在不稳定性时，增长率是离子等离子体频率的数量级。
The addition of a certain fraction of ions to an otherwise stable cloud of electrons can, in certain circumstances, result in an instability. The case of a low‐density (q = ωp2/ωc2 ≪ 1) electron cloud in which the electron motions can be described by E + ve×B = 0 is considered in detail. The condition for onset of the instability is that the unperturbed ion orbits (which characteristically traverse the entire electron cloud) should involve frequencies close to that of the diocotron wave that can propagate on the electron cloud. This condition is equivalent to having the ratio Zme/miq of the order of unity and is independent of the ion density. When instability is present, the growth rate is of the order of the ion plasma frequency.