A Weakened Cascade Model for Turbulence in Astrophysical Plasmas

Abstract

A refined cascade model for kinetic turbulence in weakly collisional astrophysical plasmas is presented that includes both the transition between weak and strong turbulence and the effect of nonlocal interactions on the nonlinear transfer of energy. The model describes the transition between weak and strong MHD turbulence and the complementary transition from strong kinetic Alfven wave (KAW) turbulence to weak dissipating KAW turbulence, a new regime of weak turbulence in which the effects of shearing by large scale motions and kinetic dissipation play an important role. The inclusion of the effect of nonlocal motions on the nonlinear energy cascade rate in the dissipation range, specifically the shearing by large-scale motions, is proposed to explain the nearly power-law energy spectra observed in the dissipation range of both kinetic numerical simulations and solar wind observations.

20 pages, 8 figures, accepted for publication in Physics of Plasmas

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Cited by in corpus (58)

• Solar Wind Turbulence and the Role of Ion Instabilities
• The Nature of Subproton Scale Turbulence in the Solar Wind
• Spectrum of Kinetic Alfven Turbulence
• Evidence for Electron Landau Damping in Space Plasma Turbulence
• Solar wind turbulent spectrum at plasma kinetic scales
• Scaling of the electron dissipation range of solar wind turbulence
• Current Sheets and Collisionless Damping in Kinetic Plasma Turbulence
• Shell Models of Magnetohydrodynamic Turbulence
• Multiscale nature of the dissipation range in gyrokinetic simulations of Alfvénic turbulence
• Density Fluctuation Spectrum of Solar Wind Turbulence between Ion and Electron Scales
• Using Synthetic Spacecraft Data to Interpret Compressible Fluctuations in Solar Wind Turbulence
• Alfven Wave Collisions, The Fundamental Building Block of Plasma Turbulence I: Asymptotic Solution
• Predicted Impacts of Proton Temperature Anisotropy on Solar Wind Turbulence
• A Dynamical Model of Plasma Turbulence in the Solar Wind
• Evidence of Critical Balance in Kinetic Alfven Wave Turbulence Simulations
• Intermittency of Solar Wind Density Fluctuations From Ion to Electron Scales
• Proton, Electron, and Ion Heating in the Fast Solar Wind from Nonlinear Coupling Between Alfvenic and Fast-Mode Turbulence
• Kinetic cascade beyond magnetohydrodynamics of solar wind turbulence in two-dimensional hybrid simulations
• An Oscillating Langevin Antenna for Driving Plasma Turbulence Simulations
• Interpreting Magnetic Variance Anisotropy Measurements in the Solar Wind
• The Violation of the Taylor Hypothesis in Measurements of Solar Wind Turbulence
• A Prospectus on Kinetic Heliophysics
• The energetic coupling of scales in gyrokinetic plasma turbulence
• Astrophysical gyrokinetics: Turbulence in pressure-anisotropic plasmas at ion scales and beyond
• Atomic and Ionized Microstructures in the Diffuse Interstellar Medium
• On stochastic heating and its phase-space signatures in low-$\beta$ kinetic turbulence
• Kinetic plasma turbulence: recent insights and open questions from 3D3V simulations
• A model for the non-universal power-law of the solar wind sub-ion scale magnetic spectrum
• Plasma Diagnostics of the Interstellar Medium with Radio Astronomy
• The Inherently Three-Dimensional Nature of Magnetized Plasma Turbulence
• Alfven Wave Collisions, The Fundamental Building Block of Plasma Turbulence II: Numerical Solution
• Resonance Broadening and Heating of Charged Particles in Magnetohydrodynamic Turbulence
• On the spectral hardening at ~> 300 keV in solar flares
• The Importance of Electron Landau Damping for the Dissipation of Turbulent Energy in Terrestrial Magnetosheath Plasma
• Interplay between intermittency and dissipation in collisionless plasma turbulence
• Spectral breaks of Alfvenic turbulence in a collisionless plasma
• Extended MHD turbulence and its applications to the solar wind
• Kinetic Alfvén turbulence below and above ion-cyclotron frequency
• Imbalanced kinetic Alfvén wave turbulence: from weak turbulence theory to nonlinear diffusion models for the strong regime
• Influence of the nonlinearity parameter on the solar-wind sub-ion magnetic energy spectrum: FLR-Landau fluid simulations
• Spectral properties and energy transfer at kinetic scales in collisionless plasma turbulence
• Comparative study of gyrokinetic, hybrid-kinetic and fully kinetic wave physics for space plasmas
• Transition from weak to strong cascade in MHD turbulence
• Landau Damping in a Turbulent Setting
• Weak Alfvénic turbulence in relativistic plasmas. Part 1. Dynamical equations and basic dynamics of interacting resonant triads
• Spectrum of kinetic plasma turbulence at 0.3-0.9 astronomical units from the Sun
• Multi-spacecraft Analysis of the Properties of Magnetohydrodynamic Fluctuations in Sub-Alfvénic Solar Wind Turbulence at 1 AU
• A Model for Dissipation of Solar Wind Magnetic Turbulence by Kinetic Alfvén Waves at Electron Scales: Comparison with Observations
• Identification of the weak-to-strong transition in Alfvénic turbulence from space plasma
• Gyrokinetic turbulence: between idealized estimates and a detailed analysis of nonlinear energy transfers
• The Velocity-Space Signature of Transit-Time Damping
• The uncertainty of local background magnetic field orientation in anisotropic plasma turbulence
• The Development of Magnetic Field Line Wander by Plasma Turbulence
• Direct kinetic Alfvén wave energy cascade in the presence of imbalance
• On the scaling and anisotropy of two subranges in the inertial range of solar wind turbulence
• Kinetic turbulence in space plasmas observed in the near-Earth and near-Sun solar wind
• Turbulent heating in collisionless low-beta plasmas: imbalance, Landau damping, and electron-ion energy partition
• Observing Particle Energization above the Nyquist Frequency: An Application of the Field-Particle Correlation Technique