112 citations · 1.2k across the 36 of their papers we have counts for
36 papers
Linking Langevin equation to scaling properties of space plasma turbulence at sub-ion scales
Simone Benella, Mirko Stumpo, Tommaso Alberti +5
Current understanding of the kinetic-scale turbulence in weakly-collisional plasmas still remains elusive. We employ a general framework in which the turbulent energy transfer is e…
Phase space dynamics of unmagnetized plasmas: collisionless and collisional regimes
G. Celebre, S. Servidio, F. Valentini
Eulerian electrostatic kinetic simulations of unmagnetized plasmas (kinetic electrons and motionless protons) with high-frequency equilibrium perturbations have been employed to in…
Three-dimensional modelling of the shock-turbulence interaction
Domenico Trotta, Oreste Pezzi, David Burgess +12
The complex interaction between shocks and plasma turbulence is extremely important to address crucial features of energy conversion in a broad range of astrophysical systems. We s…
Interpretation of flat energy spectra upstream of fast interplanetary shocks
Silvia Perri, Giuseppe Prete, Gaetano Zimbardo +6
Interplanetary shocks are large-scale heliospheric structures often caused by eruptive phenomena at the Sun, and represent one of the main sources of energetic particles. Several i…
Single-spacecraft techniques for shock parameters estimation: A systematic approach
Domenico Trotta, Laura Vuorinen, Heli Hietala +8
Spacecraft missions provide the unique opportunity to study the properties of collisionless shocks utilising in situ measurements. In the past years, several diagnostics have been…
Simulations Campaign of the Turbulent Diffusion at Tokamaks Edges
L. Scarivaglione, F. Valentini, S. Servidio
The understanding of cross-field transport is crucial in order to optimize the properties of magnetic confinement in modern fusion devices. In this work, a two-dimensional, simplif…
On the transmission of turbulent structures across the Earth's Bow Shock
Domenico Trotta, Francesco Pecora, Adriana Settino +7
Collisionless shocks and plasma turbulence are crucial ingredients for a broad range of astrophysical systems. The shock-turbulence interaction, and in particular the transmission…
Turbulent magneto-genesis in a collisionless plasma
F. Pucci, M. Viviani, F. Valentini +3
We investigate an efficient mechanism for generating magnetic fields in turbulent, collisionless plasmas. By using fully kinetic, particle-in-cell simulations of an initially non-m…
Nature of electrostatic fluctuations in the terrestrial magnetosheath
Silvia Perri, Denise Perrone, Owen Roberts +5
The high cadence plasma, electric, and magnetic field measurements by the Magnetospheric MultiScale spacecraft allow us to explore the near-Earth space plasma with an unprecedented…
Non-Maxwellianity of electron distributions near Earth's magnetopause
D. B. Graham, Yu. V. Khotyaintsev, M. André +6
Plasmas in Earth's outer magnetosphere, magnetosheath, and solar wind are essentially collisionless. This means particle distributions are not typically in thermodynamic equilibriu…
Kinetic features for the identification of Kelvin-Helmholtz vortices in \textit{in situ} observations
A. Settino, D. Perrone, Yu. V. Khotyaintsev +2
The boundaries identification of Kelvin-Helmholtz vortices in observational data has been addressed by searching for single-spacecraft small-scale signatures. A recent hybrid Vlaso…
The interaction between shocks and plasma turbulence: phase space transport
Domenico Trotta, Francesco Valentini, David Burgess +1
The interaction of collisionless shocks with fully developed plasma turbulence is numerically investigated. Hybrid kinetic simulations, where a turbulent jet is slammed against an…
Local and global properties of energy transfer in models of plasma turbulence
Christian L. Vásconez, Denise Perrone, Raffaele Marino +5
The nature of the turbulent energy transfer rate is studied using direct numerical simulations of weakly collisional space plasmas. This is done comparing results obtained from hyb…
Exact hybrid-kinetic equilibria for magnetized plasmas with shearing flows
Giovanni Guzzi, Adriana Settino, Francesco Valentini +1
Context. Magnetized plasmas characterized by shearing flows are present in many natural contexts, such as the Earth's magnetopause and the solar wind. The collisionless nature of i…
The Solar Orbiter Science Activity Plan: translating solar and heliospheric physics questions into action
I. Zouganelis, A. De Groof, A. P. Walsh +182
Solar Orbiter is the first space mission observing the solar plasma both in situ and remotely, from a close distance, in and out of the ecliptic. The ultimate goal is to understand…
Kinetic Entropy-Based Measures of Distribution Function Non-Maxwellianity: Theory and Simulations
Haoming Liang, M. Hasan Barbhuiya, P. A. Cassak +4
We investigate kinetic entropy-based measures of the non-Maxwellianity of distribution functions in plasmas, i.e., entropy-based measures of the departure of a local distribution f…
Diagnosing collisionless energy transfer using field-particle correlations: Alfven-Ion Cyclotron Turbulence
Kristopher G. Klein, Gregory G. Howes, Jason M. TenBarge +1
We apply field-particle correlations -- a technique that tracks the time-averaged velocity-space structure of the energy density transfer rate between electromagnetic fields and pl…
Kelvin-Helmholtz instability at proton scales with an exact kinetic equilibrium
A. Settino, F. Malara, O. Pezzi +3
The Kelvin-Helmholtz instability is a ubiquitous physical process in ordinary fluids and plasmas, frequently observed also in space environments. In this paper, kinetic effects at…
Kinetic Alfvén wave generation by velocity shear in collisionless plasmas
Teresa Maiorano, Adriana Settino, Francesco Malara +3
The evolution of a linearly-polarized, long-wavelength Alfvén wave --propagating in a collisionless magnetized plasma with a sheared parallel-directed velocity flow-- is here studi…
On the deviation from Maxwellian of the ion velocity distribution functions in the turbulent magnetosheath
Silvia Perri, D. Perrone, E. Yordanova +20
The degree of deviation from the thermodynamic equilibrium in the ion velocity distribution functions (VDFs), measured by the Magnetospheric Multiscale (MMS) mission in the Earth's…
ViDA: a Vlasov-DArwin solver for plasma physics at electron scales
Oreste Pezzi, Giulia Cozzani, Francesco Califano +6
We present a Vlasov-DArwin numerical code (ViDA) specifically designed to address plasma physics problems, where small-scale high accuracy is requested even during the non linear r…
Proton-proton collisions in the turbulent solar wind: Hybrid Boltzmann-Maxwell simulations
O. Pezzi, D. Perrone, S. Servidio +3
The mechanism of heating for hot, dilute, and turbulent plasmas represents a long-standing problem in space physics, whose implications concern both near-Earth environments and ast…
Turbulence-driven ion beams in the magnetospheric Kelvin-Helmholtz instability
Luca Sorriso-Valvo, Filomena Catapano, Alessandro Retinò +21
The description of the local turbulent energy transfer, and the high-resolution ion distributions measured by the Magnetospheric Multiscale mission, together provide a formidable t…
Exact hybrid-Vlasov equilibria for sheared plasmas with in-plane and out-of-plane magnetic field
F. Malara, O. Pezzi, F. Valentini
The hybrid Vlasov-Maxwell system of equations is suitable to describe a magnetized plasma at scales of the order of or larger than proton kinetic scales. An exact stationary soluti…