Kinetic range spectral features of cross-helicity using MMS
arXiv:1809.02033 · doi:10.1103/PhysRevLett.121.265101
Abstract
We study spectral features of ion velocity and magnetic field correlations in the solar wind and in the magnetosheath using data from the Magnetospheric Multi-Scale (MMS) spacecraft. High resolution MMS observations enable the study of transition of these correlations between their magnetofluid character at larger scales into the sub-proton kinetic range, previously unstudied in spacecraft data. Cross-helicity, angular alignment and energy partitioning is examined over a suit- able range of scales, employing measurements based on the Taylor frozen-in approximation as well as direct two-spacecraft correlation measurements. The results demonstrate signatures of alignment at large scales. As kinetic scales are approached, the alignment between v and b is destroyed by demagnetization of protons.
References in corpus (20)
- Spectrum of magnetohydrodynamic turbulence
- Recent progress in astrophysical plasma turbulence from solar wind observations
- Dynamic Alignment in Driven Magnetohydrodynamic Turbulence
- Role of cross helicity in magnetohydrodynamic turbulence
- Strong Anisotropic MHD Turbulence with Cross Helicity
- Rapid directional alignment of velocity and magnetic field in magnetohydrodynamic turbulence
- Residual Energy Spectrum of Solar Wind Turbulence
- Theory of incompressible MHD turbulence with scale-dependent alignment and cross-helicity
- Incompressive Energy Transfer in the Earth's Magnetosheath: Magnetospheric Multiscale Observations
- Solar Wind Turbulence Studies using MMS Fast Plasma Investigation Data
- Alignment and scaling of large-scale fluctuations in the solar wind
- Fluid and gyrofluid modeling of low- plasmas: phenomenology of kinetic Alfvén wave turbulence
- Extended MHD turbulence and its applications to the solar wind
- 3D Anisotropy of Solar Wind Turbulence, Tubes, or Ribbons?
- The Turbulent Heating Rate in Strong MHD Turbulence with Nonzero Cross Helicity
- MHD-kinetic transition in imbalanced Alfvénic turbulence
- Linking Fluid and Kinetic Scales in Solar Wind Turbulence
- Entanglement of helicity and energy in kinetic Alfven wave/whistler turbulence
- Alfvén-dynamo balance and magnetic excess in MHD turbulence
- Relaxation Processes in Solar Wind Turbulence
Cited by in corpus (9)
- Parker Solar Probe: Four Years of Discoveries at Solar Cycle Minimum
- Statistics of Kinetic Dissipation in Earth's Magnetosheath -- MMS Observations
- In situ Measurement of Curvature of Magnetic Field in Turbulent Space Plasmas: A Statistical Study
- Intermittency and Ion Temperature-Anisotropy Instabilities: Simulation and Magnetosheath Observation
- Kinetic Scale Spectral Features of Cross Helicity and Residual Energy in the Inner Heliosphere
- Interplay of Turbulence and Proton-Microinstability Growth in Space Plasmas
- Markovian Noise Modelling and Parameter Extraction Framework for Quantum Devices
- Turbulence properties and kinetic signatures of electron in Kelvin-Helmholtz waves during a geomagnetic storm
- Direct power spectral density estimation from structure functions without Fourier transforms