- 1LIRA, Observatoire de Paris, Université PSL, Sorbonne Université, Université Paris Cité, CY Cergy Paris Université, CNRS, 92190 Meudon, France
- 2Institute of Physics, University Belgrade, Pregrevica 118, 11080 Belgrade, Serbia
- 3Astronomical Institute, Boční II 1401, Prague CZ-141 00, Czech Republic
- 4Space Science Laboratory, University of California, Berkeley, CA, USA
Electromagnetic fluctuations in the solar wind cover a wide range of scales, from sun-rotation period to sub-electron scales. We study Cluster Guest Investigator data when 2 satellites were at 7 km distance, that corresponds to few electron Larmor radius. We find a typical spectral shape within the kinetic range and signatures of intermittency up to electron scales. Local analysis of magnetic fluctuations at electron scales indicates presence of vortex-like coherent structures, which can be interpreted in terms of electron scale Alfven vortices. We discuss a possible connection of these small-scale vortices with coherent structures at ion scales. The results at 1 au will be compared with spectral properties and coherent structures at kinetic scales observed by Parker Solar Probe closer to the Sun.
How to cite: Alexandrova, O., Jovanovic, D., Hellinger, P., Demoulin, P., Maksimovic, M., Bale, S., and Mangeney, A.: Solar wind turbulent fluctuations within the kinetic range of scales, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-11571, https://doi.org/10.5194/egusphere-egu25-11571, 2025.