Evidence for electron Landau damping in space plasma turbulence

Chen, C. H. K.; Klein, K. G.; Howes, G. G.

doi:10.1038/s41467-019-08435-3

Cited by 149 publications

(205 citation statements)

References 83 publications

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“…Another observationally-based result which we interpret to be consistent with our analysis is the recent claim by Chen et al (2019) that energy dissipation at kinetic scales in the magnetosheath is dominated by linear electron Landau damping (the energy dissipation rate via that channel being comparable to the energy cascade rate). Indeed, Eq.…”

Section: Reconnection At Kinetic Scalessupporting

confidence: 92%

Nonlinear Reconnection in Magnetized Turbulence

Loureiro

Boldyrev

2020

ApJ

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Recent analytical works on strong magnetized plasma turbulence have hypothesized the existence of a range of scales where the tearing instability may govern the energy cascade. In this paper, we estimate the conditions under which such tearing may give rise to full nonlinear magnetic reconnection in the turbulent eddies, thereby enabling significant energy conversion and dissipation. When those conditions are met, a new turbulence regime is accessed where reconnection-driven energy dissipation becomes common, rather than the rare feature that it must be when they are not.

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Section: Reconnection At Kinetic Scalessupporting

confidence: 92%

Nonlinear Reconnection in Magnetized Turbulence

Loureiro

Boldyrev

2020

ApJ

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“…Still different approaches study the dissipation related to peculiar mechanisms. Some examples are the dissipation of particular wave-modes, such as kinetic Alfvén 15,16 and whistler waves 17,18 , and the heating related -directly or indirectlyto magnetic reconnection [19][20][21][22][23][24] . Magnetic reconnection in a) Electronic mail: oreste.pezzi@gssi.it particular play a decisive role in energizing particles and dissipating energy in turbulent plasmas 25 .…”

Section: Introductionmentioning

confidence: 99%

Energy conversion in turbulent weakly collisional plasmas: Eulerian hybrid Vlasov-Maxwell simulations

et al. 2019

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Kinetic simulations based on the Eulerian Hybrid Vlasov-Maxwell (HVM) formalism permit the examination of plasma turbulence with useful resolution of the proton velocity distribution function (VDF). The HVM model is employed here to study the balance of energy, focusing on channels of conversion that lead to proton kinetic effects, including growth of internal energy and temperature anisotropies. We show that this Eulerian simulation approach, which is almost noise-free, is able to provide an accurate energy balance for protons. The results demonstrate explicitly that the recovered temperature growth is directly related to the role of the pressure-strain interaction. Furthermore, analysis of local spatial correlations indicates that the pressurestrain interaction is qualitatively associated with strong-current, high-vorticity structures, although other local terms -such as the heat flux-weaken the correlation. These numerical capabilities based on the Eulerian approach will enable deeper study of transfer and conversion channels in weakly collisional Vlasov plasmas.

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“…Theoretical efforts are also being carried out in order to highlight the specific processes governing the energy exchange between ranges associated to different regimes [25][26][27]. In this framework, the local, finescale details of the turbulent energy cascade acquire new importance, as the specific characteristics of the fluctuations carrying energy to the kinetic scales can be associated with different plasma processes [11,28,29].…”

Section: Introductionmentioning

confidence: 99%

Sign Singularity of the Local Energy Transfer in Space Plasma Turbulence

et al. 2019

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2In weakly collisional space plasmas, the turbulent cascade provides most of the energy that is dissipated at small scales by various kinetic processes. Understanding the characteristics of such dissipative mechanisms requires the accurate knowledge of the fluctuations that make energy available for conversion at small scales, as different dissipation processes are triggered by fluctuations of a different nature. The scaling properties of different energy channels are estimated here using a proxy of the local energy transfer, based on the third-order moment scaling law for magnetohydrodynamic turbulence. In particular, the sign-singularity analysis was used to explore the scaling properties of the alternating positive-negative energy fluxes, thus providing information on the structure and topology of such fluxes for each of the different type of fluctuations. The results show the highly complex geometrical nature of the flux, and that the local contributions associated with energy and cross-helicity nonlinear transfer have similar scaling properties. Consequently, the fractal properties of current and vorticity structures are similar to those of the Alfvénic fluctuations. PACS numbers: 94.05.-a, 94.05.Lk, 95.30.Qd

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Evidence for electron Landau damping in space plasma turbulence

Cited by 149 publications

References 83 publications

Nonlinear Reconnection in Magnetized Turbulence

Nonlinear Reconnection in Magnetized Turbulence

Energy conversion in turbulent weakly collisional plasmas: Eulerian hybrid Vlasov-Maxwell simulations

Sign Singularity of the Local Energy Transfer in Space Plasma Turbulence

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