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Voltage Waveforms Associated with Dust Impacts on Parker Solar Probe

Abstract : Since its first solar encounter in November 2018, data returned by the Parker Solar Probe (PSP) has advanced our understanding of the Sun and near-Sun environment. In particular, the PSP/FIELDS instrument suite, which measures electric and magnetic fields in the vicinity of the spacecraft, can detect changes in spacecraft floating potential from plasma clouds generated by interplanetary dust impacts, allowing in-situ measurements of the near-Sun dust environment. Early findings on the statistics of these dust impacts are reported in e.g. Page et al. 2020, Szalay et al. 2020, Bale et al. 2020, and Malaspina et al. 2020. However, little work has been done yet to examine the Time Domain Sampler (TDS) waveforms of individual dust impacts on PSP, which are available from PSP's first two solar encounters. In this study, we examine these TDS waveforms, comparing them to models of spacecraft charging due to dust impacts and attempting to identify different populations of dust based on the waveforms. Additionally, we examine timescales evident in the waveforms as related to timescales in spacecraft charging physics in the near-Sun environment. This work has implications for future modeling efforts of dust impacts on spacecraft and spacecraft charging, as well as further understanding the heliospheric dust environment.
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Submitted on : Monday, February 7, 2022 - 3:18:54 PM
Last modification on : Tuesday, May 10, 2022 - 3:24:57 PM

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L. C. Gasque, S. Bale, T. A. Bowen, Thierry Dudok de Wit, K. Goetz, et al.. Voltage Waveforms Associated with Dust Impacts on Parker Solar Probe. American Geophysical Union, 2020, Online, France. ⟨insu-03560381⟩

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