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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Constructing the frequency and wave normal distribution of whistler-mode wave power
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Constructing the frequency and wave normal distribution of whistler-mode wave power

机译：构建频率和波正常whistler-mode波功率的分布

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摘要

We introduce a new methodology that allows the construction of wave frequency distributions due to growing incoherent whistler-mode waves in the magnetosphere. The technique combines the equations of geometric optics (i.e., raytracing) with the equation of transfer of radiation in an anisotropic lossy medium to obtain spectral energy density as a function of frequency and wavenormal angle. We describe the method in detail and then demonstrate how it could be used in an idealized magnetosphere during quiet geomagnetic conditions. For a specific set of plasma conditions, we predict that the wave power peaks off the equator at ～15° magnetic latitude. The new calculations predict that wave power as a function of frequency can be adequately described using a Gaussian function, but as a function of wavenormal angle, it more closely resembles a skew normal distribution. The technique described in this paper is the first known estimate of the parallel and oblique incoherent wave spectrum as a result of growing whistler-mode waves and provides a means to incorporate self-consistent wave-particle interactions in a kinetic model of the magnetosphere over a large volume. Key Points New technique to obtain wave distributions of growing waves over large volumeCombines raytracing and radiation transfer to obtain spectral energy densityGrowing whistler-mode waves exhibit skew normal distribution in wavenormal angle
机译：我们引入一个新的方法,允许建设波频率分布越来越多不连贯的whistler-mode波磁气圈。方程的几何光学(即射线追踪)一个辐射转移方程各向异性损耗介质获得光谱能量密度作为频率的函数wavenormal角。细节,然后演示如何使用在一个理想化的磁气圈安静地磁的条件。等离子体条件下,我们预测,波浪发电山峰从赤道~ 15°磁纬度。波浪发电作为一种新的计算预测频率的函数可以充分描述使用高斯函数,但作为的函数wavenormal角,它更像一个斜正态分布。本文是第一个已知的估计并行计算和斜不连贯的波谱由于whistler-mode海浪和增长提供了一种方法将自洽波粒相互作用的动力学模型磁气圈在一个大体积。新技术获得的波分布波在大型volumeCombines增长射线和辐射转移来获得光谱能量densityGrowing whistler-mode波展览斜正态分布wavenormal角

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