论文标题
太阳风中的亚离子尺度压缩湍流：MMS航天器潜在观测值
Sub-ion scale Compressive Turbulence in the Solar wind: MMS spacecraft potential observations
论文作者
论文摘要
使用磁层多尺度任务（MMS）上的快速等离子体研究（FPI）仪器以及使用校准的旋转平面双探针（SDP）仪器的校准航天器潜在数据，使用快速等离子体研究（FPI）仪器在太阳风中进行了压缩等离子体湍流。来自FPI的数据允许对次离子量表区域（$ f_ {sc} \ gtrsim 1 $ Hz）进行测量，然后在$ f_ {sc} \ sc {sc} \ 3 $ hz的航天器帧频率下变得很大，而仪器噪声变得很大，而大约3 $ hz，而校准的spacececraft势可以校准sc $ f__ $ f _ $}。在这项工作中，我们使用MMS上的SDP仪器的航天器电位测量进行了详细描述太阳风中的密度估计。使用可用的方法论，已经处理了几个太阳风血浆的间隔。其中一个间隔进行了更详细的研究，并测量了从惯性范围到亚离子范围的功率谱密度。密度光谱的形态可以通过在大尺度上的一连串的alfvén波和慢速波和慢速波的级别来解释，在次离子尺度上，或者更普遍地通过霍尔效应来解释。使用电场测量值讨论了两个假设。
Compressive plasma turbulence is investigated at sub-ion scales in the solar wind using both the Fast Plasma Investigation (FPI) instrument on the Magnetospheric MultiScale mission (MMS), as well as using calibrated spacecraft potential data from the Spin Plane Double Probe (SDP) instrument. The data from FPI allow a measurement down to the sub-ion scale region ($f_{sc}\gtrsim 1$ Hz) to be investigated before the instrumental noise becomes significant at a spacecraft frame frequency of $f_{sc}\approx 3$Hz, whereas calibrated spacecraft potential allows a measurement up to $f_{sc}\approx 40$Hz. In this work, we give a detailed description of density estimation in the solar wind using the spacecraft potential measurement from the SDP instrument on MMS. Several intervals of solar wind plasma have been processed using the methodology described which are made available. One of the intervals is investigated in more detail and the power spectral density of the compressive fluctuations is measured from the inertial range to the sub-ion range. The morphology of the density spectra can be explained by either a cascade of Alfvén waves and slow waves at large scales and kinetic Alfvén waves at sub-ion scales, or more generally by the Hall effect. Using electric field measurements the two hypotheses are discussed.
