Nanotec/CNR, U.O.S. di Cosenza, Ponte P. Bucci, cubo 31C, 87036 Rende, Italy and Departamento de Física, Escuela Politécnica Nacional, 170517 Quito, Ecuador.
Dipartimento di Fisica, Università della Calabria, Ponte P. Bucci, cubo 31C, 87036 Rende, Italy and LPP-CNRS/Ecole Polytechnique/Sorbonne Université, 91128 Palaiseau Cedex, France.
Phys Rev Lett. 2019 Jan 25;122(3):035102. doi: 10.1103/PhysRevLett.122.035102.
The description of the local turbulent energy transfer and the high-resolution ion distributions measured by the Magnetospheric Multiscale mission together provide a formidable tool to explore the cross-scale connection between the fluid-scale energy cascade and plasma processes at subion scales. When the small-scale energy transfer is dominated by Alfvénic, correlated velocity, and magnetic field fluctuations, beams of accelerated particles are more likely observed. Here, for the first time, we report observations suggesting the nonlinear wave-particle interaction as one possible mechanism for the energy dissipation in space plasmas.
磁层多尺度任务（Magnetospheric Multiscale mission）所测量的局部湍能耗散描述以及高分辨率离子分布，共同为探索流体尺度能量级联与亚离子尺度等离子体过程之间的跨尺度联系提供了强有力的工具。当小尺度能量传递主要由阿尔文、相关速度和磁场涨落主导时，更有可能观察到加速粒子束。在这里，我们首次报告了观测结果，表明非线性波粒相互作用可能是空间等离子体能量耗散的一种机制。
