Search Publications

Estimating the fate of oxygen ion outflow from the high-altitude cusp

Slapak, Rikard; Schillings, Audrey; Haaland, Stein +2 more

We have investigated the oxygen escape-to-capture ratio from the high-altitude cusp regions for various geomagnetic activity levels by combining EDI and CODIF measurements from the Cluster spacecraft. Using a magnetic field model, we traced the observed oxygen ions to one of three regions: plasma sheet, solar wind beyond a distant X-line or daysid…

The fate of O⁺ ions observed in the plasma mantle: particle tracing modelling and cluster observations

Nilsson, Hans; Gunell, Herbert; Slapak, Rikard +5 more

Ion escape is of particular interest for studying the evolution of the atmosphere on geological timescales. Previously, using Cluster-CODIF data, we investigated the oxygen ion outflow from the plasma mantle for different solar wind conditions and geomagnetic activity. We found significant correlations between solar wind parameters, geomagnetic ac…

A deep insight into the ion foreshock with the help of test particle two-dimensional simulations

Lembège, Bertrand; Savoini, Philippe

Two-dimensional (2D) test particle simulations based on shock profiles issued from 2D full particle-in-cell (PIC) simulations are used in order to analyze the formation processes of ions back streaming within the upstream region after interacting with a quasi-perpendicular curved shock front. Two different types of simulations have been performed …