Kinetic Plasma Turbulence: Recent Insights and Open Questions From 3D3V Simulations

被引:45
作者
Cerri, Silvio Sergio [1 ]
Groselj, Daniel [2 ]
Franci, Luca [3 ]
机构
[1] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA
[2] Max Planck Inst Plasma Phys, Garching, Germany
[3] Queen Mary Univ London, Sch Phys & Astron, London, England
基金
美国国家航空航天局; 英国科学技术设施理事会;
关键词
magnetic fields; plasma turbulence; solar wind; kinetic plasma simulations; turbulence intermittency; plasma waves; SOLAR-WIND; 3-DIMENSIONAL ANISOTROPY; ALFVEN TURBULENCE; ELECTRON; WAVES; INTERMITTENCY; MODEL;
D O I
10.3389/fspas.2019.00064
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Turbulence and kinetic processes in magnetized space plasmas have been extensively investigated over the past decades via in-situ spacecraft measurements, theoretical models and numerical simulations. In particular, multi-point high-resolution measurements from the Cluster and MMS space missions brought to light an entire new world of processes, taking place at the plasma kinetic scales, and exposed new challenges for their theoretical interpretation. A long-lasting debate concerns the nature of ion and electron scale fluctuations in solar-wind turbulence and their dissipation via collisionless plasma mechanisms. Alongside observations, numerical simulations have always played a central role in providing a test ground for existing theories and models. In this Perspective, we discuss the advances achieved with our 3D3V (reduced and fully) kinetic simulations, as well as the main questions left open (or raised) by these studies. To this end, we combine data from our recent kinetic simulations of both freely decaying and continuously driven fluctuations to assess the similarities and/or differences in the properties of plasma turbulence in the sub-ion range. Finally, we discuss possible future directions in the field and highlight the need to combine different types of numerical and observational approaches to improve the understanding of turbulent space plasmas.
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页数:11
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