EGU22-11250
https://doi.org/10.5194/egusphere-egu22-11250
EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Very long electric field disturbances induced by dust impact observed by the Solar Orbiter/RPW

Michiko Morooka1, Yuri Khotyaintsev1, Milan Maksimovic2, Jan Soucek3, and David Pisa3
Michiko Morooka et al.
  • 1Swedish Institute of Space Physics (IRFU), Uppsala, Sweden (morooka@irfu.se)
  • 2CNRS & LESIA, Paris observatory, France
  • 3Institute of Atmospheric Physics, Czech Academy of Sciences, Prague, Czech Republic

Transient electric field perturbations are commonly observed when the interplanetary dust grains impact spacecraft, and their characteristics are well-studied. The signals are interpreted as due to the plasma expansion at the impact site and last typically in the order of micro-to milli-seconds. Radio and Plasma Wave (RPW) Instrument onboard Solar Orbiter can observe grains with a dedicated mode to capture such short-lived signals by the dust in the inner Heliosphere. On the other hand, a large impact can cause electric field disturbance for a longer time in tens of seconds. The long signals are observed in the low-frequency range (<10 kHz) and found more frequently during the inbound of the Solar Orbiter excursion. We will discuss the plasma and spacecraft conditions for the long durational impact signals.

How to cite: Morooka, M., Khotyaintsev, Y., Maksimovic, M., Soucek, J., and Pisa, D.: Very long electric field disturbances induced by dust impact observed by the Solar Orbiter/RPW, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-11250, https://doi.org/10.5194/egusphere-egu22-11250, 2022.