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 the sub-ion scale region ( f sc ≳ 1 Hz) to be investigated before the instrumental noise becomes significant at a spacecraft frame frequency of f sc ≈ 3 Hz. Whereas the calibrated spacecraft potential allows a measurement up to f sc ≈ 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 and are made available. One of the intervals is investigated in more detail and the power spectral density of the compressive fluc...

中文翻译：

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太阳风中的亚离子级压缩湍流：MMS航天器的潜在观测

使用磁层多尺度任务（MMS）上的快速等离子体调查（FPI）仪器，以及使用自旋飞机双探针（SDP）校准的航天器势能数据，以太阳风中的子离子尺度对压缩等离子体湍流进行了研究。仪器。来自FPI的数据允许在仪器噪声在f sc≈3 Hz的航天器帧频率变得明显之前对亚离子标度区域（f sc≳1 Hz）进行研究。经校准的航天器电势可以进行高达f sc≈40 Hz的测量。在这项工作中，我们将使用MMS上SDP仪器的航天器电势测量结果来详细描述太阳风中的密度估算。使用上述方法已经处理了几个间隔的太阳风等离子体，并且可以利用这些间隔。