论文标题
使用MMS航天器的短波长静电波测量
Short wavelength electrostatic wave measurement using MMS spacecraft
论文作者
论文摘要
确定短波长静电波的波模式以及它们的生成机制需要可靠的波电场测量。我们研究了MMS观察到的短波长波的电场测量的可靠性。我们基于自旋平面干涉法开发一种方法，以可靠地确定观察到的波的完整3D波矢量。我们测试合成数据的方法，然后将其应用于太阳风中原位测得的离子声波爆发。通过研究太阳风中离子声波的统计特性，我们检索了已知的结果，即波传播主要是磁场对齐的。我们还确定波的波长。我们发现，分布在100 m左右的峰值，当归一化到Debye长度时，该分布对应于10到20个Debye长度之间的尺度。
Determination of the wave mode of short-wavelength electrostatic waves along with their generation mechanism requires reliable measurement of the wave electric field. We investigate the reliability of the electric field measurement for short-wavelength waves observed by MMS. We develop a method, based on spin-plane interferometry, to reliably determine the full 3D wave vector of the observed waves. We test the method on synthetic data and then apply it to ion acoustic wave bursts measured in situ in the solar wind. By studying the statistical properties of ion acoustic waves in the solar wind we retrieve the known results that the wave propagation is predominantly field-aligned. We also determine the wavelength of the waves. We find that the distribution peaks at around 100 m, which when normalized to the Debye length corresponds to scales between 10 and 20 Debye lengths.
