Electromagnetic instabilities of low-beta alpha/proton beams in space plasmas
Electromagnetic instabilities of low-beta alpha/proton beams in space plasmas
复制标题
空间等离子体中低βα/质子束的电磁不稳定性
DOI:
10.1007/s10509-020-03823-4
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发表时间:
2020
影响因子:
1.9
通讯作者:
Poedts, S.
中科院分区:
文献类型:
--
作者:
Rehman, M. A.;Shaaban, S. M.;Yoon, P. H.;Lazar, M.;Poedts, S.
Relative drifts between different species or particle populations are characteristic to solar plasma outflows, e.g., in the fast streams of the solar winds, coronal mass ejections and interplanetary shocks. This paper characterizes the dispersion and stability of the low-beta alpha/proton drifts in the absence of any intrinsic thermal anisotropies, which are usually invoked in order to stimulate various instabilities. The dispersion relations derived here describe the full spectrum of instabilities and their variations with the angle of propagation and plasma parameters. The results unveil a potential competition between instabilities of the electromagnetic proton cyclotron and alpha cyclotron modes. For conditions specific to a low-beta solar wind, e.g., at low heliocentric distances in the outer corona, the instability operates on the alpha cyclotron branch. The growth rates of the alpha cyclotron mode are systematically stimulated by the (parallel) plasma beta and/or the alpha-proton temperature ratio. One can therefore expect that this instability develops even in the absence of temperature anisotropies, with potential to contribute to a self-consistent regulation of the observed drift of alpha particles.
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影响因子:
6.5
作者:
D. Stansby;D. Perrone;L. Matteini;T. Horbury;C. Salem
通讯作者:
D. Stansby;D. Perrone;L. Matteini;T. Horbury;C. Salem
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
L. Gomberoff;J. Valdivia
通讯作者:
J. Valdivia
DOI:
--
发表时间:
1999
期刊:
影响因子:
--
作者:
Xing Li;S. Habbal
通讯作者:
S. Habbal
DOI:
--
发表时间:
1978
期刊:
影响因子:
--
作者:
P. Revathy
通讯作者:
P. Revathy