The role of nonlinear interaction in the formation of LF whistler turbulence upstream of a quasi-perpendicular shock
The role of nonlinear interaction in the formation of LF whistler turbulence upstream of a quasi-perpendicular shock
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非线性相互作用在准垂直激波上游 LF 哨声湍流形成中的作用
DOI：
10.1029/1998ja900102
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发表时间：
1999
影响因子：
--
通讯作者：
Wolfgang Baumjohann
中科院分区：
文献类型：
--
作者：
M. Balikhin;H. Alleyne;R. Treumann;M. Nozdrachev;S. Walker;Wolfgang Baumjohann
在准垂直激波斜板上游，对非线性相互作用在发展的低频湍流中的作用进行了实验研究。对磁层粒子示踪探测器离子释放模块和Interball尾探测器磁场数据应用双谱分析和小波分解方法进行了研究。结果表明，三波过程在湍流谱的形成中起着关键作用。提出的实验结果和以前的理论考虑导致的结论是，能量从一个狭窄的最高频率泵浦的非线性动力学过程中转移到较低和较高的频率。
The role of the nonlinear interaction in developed low-frequency turbulence has been experimentally studied upstream of the ramp of a quasiperpendicular shock. The study has been carried out by application of the methods of bispectral analysis and wavelet decomposition to the Active Magnetospheric Particle Tracer Explorer Ion Release Module and Interball Tail Probe magnetic field data. It is shown that three-wave processes play a key role in the formation of the spectrum of the turbulence. Experimental results presented and previous theoretical considerations lead to the conclusion that energy is transfered from a narrow maximum frequency pumped by nonlinear dynamic processes to lower and higher frequencies.