Study of the ionospheric Alfven resonant feed back instability
Study of the ionospheric Alfven resonant feed back instability
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电离层阿尔文共振反馈不稳定性研究
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
Shi Run
中科院分区：
文献类型：
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作者：
Shi Run
采用层状模型（磁层、电离层和大气）分析电离层电导率和磁场倾角对电离层Alfven谐振（IAR）反馈不稳定性的影响。数值计算结果表明，倾角有效地改变了IAR的参数（谐振频率和增长率），从而影响了IAR的反馈不稳定性；对于向上磁场，当忽略霍尔电导时，倾角的减小有利于大Pederson电导率不稳定性的形成；考虑霍尔电导可以提高生长速率，特别是当倾角较大时。
The layered model(magnetosphere,ionosphere and atmosphere) is used to analyze the influence of ionospheric conductivity and dip angle of the magnetic field on the Ionospheric Alfven Resonant(IAR) feedback instability.The results of the numerical calculation show that the dip angle effectively modifies the parameters(resonant frequencies and the growth rate) of the IAR,which consequently influence the IAR feedback instability;for the upward magnetic field,the decreasing of dip angle is propitious to the formation of the instability for large Pederson conductivity when ignoring the Hall conductance;the consideration of Hall conductance can increase the growth rate,especially for greater dip angle.