Characterizing current structures in 3D hybrid-kinetic simulations of plasma turbulence
arXiv:2107.14130 · doi:10.1051/0004-6361/202141902
Abstract
In space and astrophysical plasmas turbulence leads to the development of coherent structures characterized by a strong current density and important magnetic shears. Using hybrid-kinetic simulations of turbulence (3D with different energy injection scales) we investigate the development of these coherent structures and characterize their shape. First, we present different methods to estimate the overall shape of the 3D structure using local measurements, foreseeing application on satellite data. Then we study the local magnetic configuration inside and outside current peak regions, comparing the statistics in the two cases. Last, we compare the statistical properties of the local configuration obtained in simulations with the ones obtained analyzing an MMS dataset having similar plasma parameters. Thanks to our analysis, 1) we validate the possibility to study the overall shape of 3D structures using local methods, 2) we provide an overview of local magnetic configuration emerging in different turbulent regimes, 3) we show that our 3D-3V simulations can reproduce the structures that emerge in MMS data for the periods studied by Phan et al. (2018), Stawarz et al. (2019).
References in corpus (14)
- Recent progress in astrophysical plasma turbulence from solar wind observations
- Magnetic Reconnection and Intermittent Turbulence in the Solar Wind
- Kinetic turbulence in relativistic plasma: from thermal bath to non-thermal continuum
- Magnetic reconnection as a driver for a sub-ion scale cascade in plasma turbulence
- Multiscale nature of the dissipation range in gyrokinetic simulations of Alfvénic turbulence
- Collisionless Reconnection in Magnetohydrodynamic and Kinetic Turbulence
- Hybrid-Kinetic Simulations of Ion Heating in Alfvénic Turbulence
- Kinetic cascade in solar-wind turbulence: 3D3V hybrid-kinetic simulations with electron inertia
- Fully kinetic versus reduced-kinetic modelling of collisionless plasma turbulence
- The Structure of Plasma Heating in Gyrokinetic Alfvénic Turbulence
- On the statistical properties of turbulent energy transfer rate in the inner Heliosphere
- Energy Dissipation in Magnetohydrodynamic Turbulence: Coherent Structures or "Nanoflares"?
- Kinetic plasma turbulence: recent insights and open questions from 3D3V simulations
- Three-dimensional magnetic reconnection in particle-in-cell simulations of anisotropic plasma turbulence