用两点测量识别等离子体中的非线性波相互作用:短大振幅磁结构(SLAMS)的实例研究
Identifying nonlinear wave interactions in plasmas using two-point measurements: a case study of Short Large Amplitude Magnetic Structures (SLAMS)
摘要:
本文描述了一个用两点测量方法估算湍流波场线性增长率和谱能量传递的框架。这种方法,这是基于Volterra系列,适用于双卫星数据收集在附近的地球的弓形激波,其中短大振幅磁结构(SLAMS)理应发挥主导作用。分析证实了SLAMS的动态演变,并揭示了一个能量级联向高频波。
英文摘要:
A framework is described for estimating Linear growth rates and spectral energy transfers in turbulent wave-fields using two-point measurements. This approach, which is based on Volterra series, is applied to dual satellite data gathered in the vicinity of the Earth's bow shock, where Short Large Amplitude Magnetic Structures (SLAMS) supposedly play a leading role. The analysis attests the dynamic evolution of the SLAMS and reveals an energy cascade toward high-frequency waves.
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