Identification and characterization of current sheets in collisionless plasma turbulence
arXiv:2009.03881 · doi:10.1063/5.0040692
Abstract
The properties of current sheets forming in a ion-kinetically turbulent collisionless plasma are investigated by utilizing the results of two-dimensional hybrid-kinetic numerical simulations. For this sake the algorithm proposed by Zhdankin et al. (2013) for the analysis of current sheets forming in MHD-turbulent plasmas, was extended to analyse the role and propertes of current sheets formating in a much noisier kinetically turbulent plasma. The applicability of this approach to the analysis of kinetically-turbulent plasmas is verified. Invesigated are, e.g., the effects of the choice of parameters on the current sheet recognition, viz. the threshold current density, the minimum current density and of the local regions around current density peaks. The main current sheet properties are derived, their peak current density, the peak current carrier velocity (mainly electrons), the thickness and length of the current sheets, i.e. also their aspect ratio (length/thickness). By varying the grid resolution of the simulations it is shown that, as long as the electron inertia is not taken into account, the current sheets thin down well below ion inertial length scale until numerical (grid-resolution based) dissipation stops any the further thinning.
References in corpus (32)
- Astrophysical gyrokinetics: kinetic and fluid turbulent cascades in magnetized weakly collisional plasmas
- Universality of solar wind turbulent spectrum from MHD to electron scales
- Recent progress in astrophysical plasma turbulence from solar wind observations
- Statistical Analysis of Current Sheets in Three-Dimensional Magnetohydrodynamic Turbulence
- Energy transfer, pressure tensor and heating of kinetic plasma
- Current Sheets and Collisionless Damping in Kinetic Plasma Turbulence
- 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
- A Numerical Simulation of the Reconnection Layer in 2D Resistive MHD
- Collisionless Reconnection in Magnetohydrodynamic and Kinetic Turbulence
- Disruption of Alfvénic turbulence by magnetic reconnection in a collisionless plasma
- Magnetohydrodynamic turbulence mediated by reconnection
- Fully Kinetic Simulation of 3D Kinetic Alfven Turbulence
- Structures in magnetohydrodynamic turbulence: detection and scaling
- Kinetic cascade in solar-wind turbulence: 3D3V hybrid-kinetic simulations with electron inertia
- Can Hall Magnetohydrodynamics explain plasma turbulence at sub-ion scales?
- Fully kinetic versus reduced-kinetic modelling of collisionless plasma turbulence
- The Structure of Plasma Heating in Gyrokinetic Alfvénic Turbulence
- Kinetic Turbulence in Astrophysical Plasmas: Waves and/or Structures?
- Turbulent Dissipation Challenge: A community Driven Effort
- Kinetic plasma turbulence: recent insights and open questions from 3D3V simulations
- Energy dynamics and current sheet structure in fluid and kinetic simulations of decaying magnetohydrodynamic turbulence
- Plasma turbulence at ion scales: a comparison between PIC and Eulerian hybrid-kinetic approaches
- Scalings of intermittent structures in magnetohydrodynamic turbulence
- Observations of heating along intermittent structures in the inner heliosphere from PSP data
- A new hybrid code (CHIEF) implementing the inertial electron fluid equation without approximation
- Identifying magnetic reconnection in 2D Hybrid Vlasov Maxwell simulations with Convolutional Neural Networks
- Free energy sources in current sheets formed in collisionless plasma turbulence
- Detecting Reconnection Events in Kinetic Vlasov Hybrid Simulations Using Clustering Techniques
- Effect of guide field on three dimensional electron shear flow instabilities in collisionless magnetic reconnection
- Automated identification of current sheets -- a new tool to study turbulence and intermittency in the solar wind
- Electron-only magnetic reconnection in plasma turbulence