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…
Magnetometer in-flight offset accuracy for the BepiColombo spacecraft
Plaschke, Ferdinand; Volwerk, Martin; Narita, Yasuhito +6 more
Recently the two-spacecraft mission BepiColombo launched to explore the plasma and magnetic field environment of Mercury. Both spacecraft, the Mercury Planetary Orbiter (MPO) and the Mercury Magnetospheric Orbiter (MMO, also referred to as Mio), are equipped with fluxgate magnetometers, which have proven to be well-suited to measure the magnetic f…
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 …
Dust observations with antenna measurements and its prospects for observations with Parker Solar Probe and Solar Orbiter
Issautier, Karine; Meyer-Vernet, Nicole; Mann, Ingrid +10 more
The electric and magnetic field instrument suite FIELDS on board the NASA Parker Solar Probe and the radio and plasma waves instrument RPW on the ESA Solar Orbiter mission that explore the inner heliosphere are sensitive to signals generated by dust impacts. Dust impacts have been observed using electric field antennas on spacecraft since the 1980…
Multi-point galactic cosmic ray measurements between 1 and 4.5 AU over a full solar cycle
Guo, Jingnan; Heber, Bernd; Kuulkers, Erik +6 more
The radiation data collected by the Standard Radiation Environment Monitor (SREM) aboard ESA missions INTEGRAL (INTErnational Gamma-Ray Astrophysics Laboratory), Rosetta, Herschel, Planck and Proba-1, and by the high-energy neutron detector (HEND) instrument aboard Mars Odyssey, are analysed with an emphasis on characterising galactic cosmic rays …
Terrestrial ion escape and relevant circulation in space
Yamauchi, Masatoshi
Observations of the terrestrial ion escape to space and the transport of escaping ions in the magnetosphere are reviewed, with the main stress on subjects that were not covered in reviews over past 2 decades, during which Cluster has significantly improved our knowledge of them. Here, outflowing ions from the ionosphere are classified in terms of …
Acceleration of protons and heavy ions to suprathermal energies during dipolarizations in the near-Earth magnetotail
Grigorenko, Elena E.; Kronberg, Elena A.; Daly, Patrick W. +2 more
In this work we present an analysis of the dynamics of suprathermal ions of different masses (H+, He+, O+) during prolonged dipolarizations in the near-Earth magnetotail (X>-17RE) according to Cluster/RAPID observations in 2001-2005. All dipolarizations from our database were associated with fast flow…
Multiscale estimation of the field-aligned current density
Vogt, Joachim; Marghitu, Octav; Bunescu, Costel +1 more
Field-aligned currents (FACs) in the magnetosphere-ionosphere (M-I) system exhibit a range of spatial and temporal scales that are linked to key dynamic coupling processes. To disentangle the scale dependence in magnetic field signatures of auroral FACs and to characterize their geometry and orientation, Bunescu et al. (2015) introduced the multis…
Wavelet analysis of the magnetotail response to solar wind fluctuations during HILDCAA events
Echer, Ezequiel; Marques de Souza Franco, Adriane; José Alves Bolzan, Mauricio
In this work a study of the effects of the high-intensity long-duration continuous AE activity (HILDCAAs) events in the magnetotail was conducted. The aim of this study was to search the main frequencies during HILDCAAs in the Bx component of the geomagnetic field in the magnetotail, as well as the main frequencies, at which the magneto…