Petr Hellinger
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View article: Pressure-strain interaction in plasma turbulence: Contribution of the ion non-gyrotropy
Pressure-strain interaction in plasma turbulence: Contribution of the ion non-gyrotropy Open
Aims. We investigated the properties of plasma turbulence at ion scales in the context of the solar wind. We concentrated on the pressure-strain coupling between the kinetic and magnetic energy and the internal energy; we analysed its capa…
View article: Effects of cold electron emissions on thermal plasma measurements on board Solar Orbiter spacecraft
Effects of cold electron emissions on thermal plasma measurements on board Solar Orbiter spacecraft Open
Aims. Emissions of photo and secondary electrons influence thermal electron measurements on board spacecraft, typically below a threshold determined by the spacecraft’s potential. We aim to examine and quantify this contamination of the ob…
View article: Decay of magnetohydrodynamic turbulence in the expanding solar wind: WIND observations
Decay of magnetohydrodynamic turbulence in the expanding solar wind: WIND observations Open
We have studied the decay of turbulence in the solar wind. Fluctuations carried by the expanding wind are naturally damped because of flux conservation, slowing down the development of a turbulent cascade. The latter also damps fluctuation…
View article: Rugged magneto-hydrodynamic invariants in weakly collisional plasma turbulence: Two-dimensional hybrid simulation results
Rugged magneto-hydrodynamic invariants in weakly collisional plasma turbulence: Two-dimensional hybrid simulation results Open
Aims. We investigated plasma turbulence in the context of solar wind. We concentrated on properties of ideal second-order magneto-hydrodynamic (MHD) and Hall MHD invariants. Methods. We studied the results of a two-dimensional hybrid simul…
View article: An unbiased view of the contributions to turbulence cascade in Earth's magnetosheath.
An unbiased view of the contributions to turbulence cascade in Earth's magnetosheath. Open
Earth's magnetosheath is a medium where plasma parameters can take a wide range of values and where plasma fluid properties can vary greatly, depending on the distance to the bow shock and the upstream solar wind conditions. Plasma turbule…
View article: Solar Orbiter charging effects on electron measurements via SPIS simulation.
Solar Orbiter charging effects on electron measurements via SPIS simulation. Open
The ESA mission Solar Orbiter is providing, besides other observations, in-situ measurements of the solar wind plasma. The boom mounted electron analyser (SWA-EAS) acquires ambient as well as spacecraft produced (photo-, secondary-) electr…
View article: Alfvénic fluctuations in the expanding solar wind: Formation and radial evolution of spherical polarization
Alfvénic fluctuations in the expanding solar wind: Formation and radial evolution of spherical polarization Open
We investigate properties of large-scale solar wind Alfvénic fluctuations and their evolution during radial expansion. We assume a strictly radial background magnetic field B∥R, and we use two-dimensional hybrid (fluid electrons, kinetic i…
View article: Anisotropy of plasma turbulence at ion scales: Hall and pressure–strain effects
Anisotropy of plasma turbulence at ion scales: Hall and pressure–strain effects Open
Aims. We investigated the properties of plasma turbulence at ion scales in the solar wind context. We concentrated on the behaviour of the Hall physics and the pressure strain interaction and their anisotropy owing to the ambient magnetic …
View article: On the nature of electric field fluctuations in the near-Sun solar wind and its implication for the turbulent energy transfer at ion and electron scales
On the nature of electric field fluctuations in the near-Sun solar wind and its implication for the turbulent energy transfer at ion and electron scales Open
We model plasma turbulence in the near-Sun solar wind by means of a high-resolution fully kinetic simulation initialised with average plasma conditions measured by Parker Solar Probe during its first solar encounter. Once turbulence is ful…
View article: Photoelectrons and spacecraft potential effects on SWA-EAS electron measurements on board the Solar Orbiter spacecraft
Photoelectrons and spacecraft potential effects on SWA-EAS electron measurements on board the Solar Orbiter spacecraft Open
Any spacecraft immersed into the solar wind builds up a non-zero electric potential with respect to the local environment by continuously collecting the charged particles from ambient plasma populations and emitting additional charged part…
View article: Quantification of the Cross-helicity Turbulent Cascade in Compressible MHD Simulations
Quantification of the Cross-helicity Turbulent Cascade in Compressible MHD Simulations Open
In plasma turbulence, energy and cross helicity are transferred across scales at a constant rate as a consequence of nonlinear interactions. In incompressible magnetohydrodynamics (MHD), the energy cascade rate of both quantities can be co…
View article: Plasma Turbulence in the Near-Sun and Near-Earth Solar Wind: A Comparison via Observation-Driven 2D Hybrid Simulations
Plasma Turbulence in the Near-Sun and Near-Earth Solar Wind: A Comparison via Observation-Driven 2D Hybrid Simulations Open
We analyse two high-resolution 2D hybrid simulations of plasma turbulence with observation-driven initial conditions that are representative of the near-Sun and the near-Earth solar wind. The former employs values of some fundamental param…
View article: Anisotropic Electron Heating in Turbulence-driven Magnetic Reconnection in the Near-Sun Solar Wind
Anisotropic Electron Heating in Turbulence-driven Magnetic Reconnection in the Near-Sun Solar Wind Open
We perform a high-resolution, 2D, fully kinetic numerical simulation of a turbulent plasma system with observation-driven conditions, in order to investigate the interplay between turbulence, magnetic reconnection, and particle heating fro…
View article: Anisotropic electron heating in turbulence-driven magnetic reconnection in the near-Sun solar wind
Anisotropic electron heating in turbulence-driven magnetic reconnection in the near-Sun solar wind Open
We perform a high-resolution two-dimensional fully-kinetic numerical simulation of a turbulent plasma system with observation-driven conditions, in order to investigate the interplay between turbulence, magnetic reconnection, and particle …
View article: Ion-scale Transition of Plasma Turbulence: Pressure–Strain Effect
Ion-scale Transition of Plasma Turbulence: Pressure–Strain Effect Open
We investigate properties of solar-wind-like plasma turbulence using direct numerical simulations. We analyze the transition from large, magnetohydrodynamic (MHD) scales to the ion characteristic ones using two-dimensional hybrid (fluid el…
View article: Kinetic Instabilities from Ion Beams and Differential Streaming in the Close-Sun Solar Wind: Hybrid Expanding Simulations
Kinetic Instabilities from Ion Beams and Differential Streaming in the Close-Sun Solar Wind: Hybrid Expanding Simulations Open
<p>Parker Solar Probe observations in the inner heliosphere have demonstrated that non-thermal features in solar wind ion distributions are particularly enhanced and dominant in the close-Sun environment. Proton beams and large diffe…
View article: Ion-scale transition of plasma turbulence: Pressure-strain effect
Ion-scale transition of plasma turbulence: Pressure-strain effect Open
<p>We investigate properties of solar-wind like plasma turbulence using direct numerical simulations. We analyze the transition from large (magnetohydrodynamic) scales to ion ones using two-dimensional hybrid (fluid electrons, kineti…
View article: Characterization of space-time structures in 3D simulations of plasma turbulence with Fast Iterative Filtering.
Characterization of space-time structures in 3D simulations of plasma turbulence with Fast Iterative Filtering. Open
<p>We present results from a multiscale spatiotemporal analysis of 3D Hall-MHD and hybrid kinetic numerical simulations of decaying plasma turbulence. By combining Fourier analysis and Fast Iterative Filtering, we compute the 3D <…
View article: Fully kinetic simulations of the near-Sun solar wind plasma: turbulence, reconnection, and particle heating
Fully kinetic simulations of the near-Sun solar wind plasma: turbulence, reconnection, and particle heating Open
<p>We model the development of plasma turbulence in the near-Sun solar wind with high-resolution fully-kinetic particle-in-cell (PIC) simulations, initialised with plasma conditions measured by Parker Solar Probe during its first sol…
View article: Quantification of the cross-helicity cascade with Karman-Howarth-Monin and Spectral transfer equations
Quantification of the cross-helicity cascade with Karman-Howarth-Monin and Spectral transfer equations Open
<p>Spectral transfer equations allow to  quantify the value of the energy flux of a turbulent flow across concentric shells in Fourier space. Karman-Howarth-Monin equations serve as a complement to the Spectral Transfer anal…
View article: Properties of Hall-MHD Turbulence at Sub-Ion Scales: Spectral Transfer Analysis
Properties of Hall-MHD Turbulence at Sub-Ion Scales: Spectral Transfer Analysis Open
We present results of a multiscale study of Hall-magnetohydrodynamic (MHD) turbulence, carried out on a dataset of compressible nonlinear 2D Hall-MHD numerical simulations of decaying Alfvénic turbulence. For the first time, we identify tw…
View article: Editorial: Advances in Space Plasma Turbulence: Theory and Observations
Editorial: Advances in Space Plasma Turbulence: Theory and Observations Open
EDITORIAL article Front. Astron. Space Sci., 10 November 2021Sec. Space Physics https://doi.org/10.3389/fspas.2021.801868
View article: First observations and performance of the RPW instrument on board the Solar Orbiter mission
First observations and performance of the RPW instrument on board the Solar Orbiter mission Open
The Radio and Plasma Waves (RPW) instrument on the ESA Solar Orbiter mission is designed to measure in situ magnetic and electric fields and waves from the continuum up to several hundred kHz. The RPW also observes solar and heliospheric r…
View article: The Solar Orbiter Radio and Plasma Waves (RPW) instrument <i>(Corrigendum)</i>
The Solar Orbiter Radio and Plasma Waves (RPW) instrument <i>(Corrigendum)</i> Open
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View article: Spectral Transfer and Kármán–Howarth–Monin Equations for Compressible Hall Magnetohydrodynamics
Spectral Transfer and Kármán–Howarth–Monin Equations for Compressible Hall Magnetohydrodynamics Open
We derive two new forms of the Kármán–Howarth–Monin (KHM) equation for decaying compressible Hall magnetohydrodynamic (MHD) turbulence. We test them on results of a weakly compressible, 2D, moderate-Reynolds-number Hall MHD simulation and …
View article: Spectrum of kinetic plasma turbulence at 0.3–0.9 astronomical units from the Sun
Spectrum of kinetic plasma turbulence at 0.3–0.9 astronomical units from the Sun Open
We investigate spectral properties of turbulence in the solar wind that is a weakly collisional astrophysical plasma, accessible to in situ observations. Using the Helios search coil magnetometer measurements in the fast solar wind, in the…
View article: Proton Energization by Phase Steepening of Parallel-propagating Alfvénic Fluctuations
Proton Energization by Phase Steepening of Parallel-propagating Alfvénic Fluctuations Open
Proton energization at magnetic discontinuities generated by phase-steepened fronts of parallel-propagating, large-amplitude Alfvénic fluctuation is studied using hybrid simulations. We find that dispersive effects lead to the collapse of …
View article: Proton energization by phase-steepening of parallel propagating Alfvénic fluctuations
Proton energization by phase-steepening of parallel propagating Alfvénic fluctuations Open
Proton energization at magnetic discontinuities generated by phase-steepened fronts of parallel propagating, large-amplitude Alfvénic fluctuation is studied using hybrid simulations. We find that dispersive effects yield to the collapse of…
View article: Spectrum of kinetic plasma turbulence at 0.3-0.9 AU from the Sun
Spectrum of kinetic plasma turbulence at 0.3-0.9 AU from the Sun Open
<p>We investigate the spectral properties of the turbulence in the solar wind which is a weakly collisional astrophysical plasma, accessible by in-situ observations. Using the Helios search coil magnetometer measurements in the fast …
View article: Karman-Howarth-Monin equation for compressible Hall MHD &#160;turbulence: 2D and 3D Hall MHD simulations
Karman-Howarth-Monin equation for compressible Hall MHD  turbulence: 2D and 3D Hall MHD simulations Open
<p>Turbulence in the solar wind is developed along a vast range of scales, generally under weakly compressible and strong magnetic field plasma conditions. <br>The effects of weakly and moderate compressibility (Mach ≤…