University of Helsinki, Department of Physics, Helsinki, Finland
University of Helsinki, Department of Physics, Helsinki, Finland
Laboratoire de Physique des Plasmas (LPP), CNRS, Observatoire de Paris, Sorbonne Universite, Universite Paris-Saclay, Ecole polytechnique, Institut Polytechnique de Paris, 91120 Palaiseau, France, Palaiseau, France
University of Helsinki, Helsinki, Finland
University of Helsinki, Helsinki, Finland
University of Helsinki, Helsinki, Finland
LPP - CNRS - Ecole polytechnique - UPMC, Palaiseau, France