Abid A A, Hussain M S, Esmaeili Amin, Khan Abdullah, Ali S, Alharbi M, Al-Hadeethi Yas, Bedaiwi Nada M
Joint Laboratory of Plasma Application Technology, Institute of Advanced Technology, University of Science and Technology of China, Hefei, 230026, China.
CAS Key Laboratory of Geospace Environment, University of Science and Technology of China, Hefei, 230026, China.
Sci Rep. 2024 Nov 27;14(1):29468. doi: 10.1038/s41598-024-74965-6.
A study of velocity distribution function in Earth's magnetosphere is conducted using high-resolution measurements from the Magnetospheric Multiscale Spacecraft (MMS). The analysis focuses on the AZ-non-Maxwellian distribution that is a complex velocity-space structure, exhibiting a power-law distribution of moments. By imposing constraints on the spectral indices of the AZ-velocity distribution, the most suitable distribution for modeling Earth's magnetosphere is determined. The combined use of MMS data and analysis of velocity distribution provides new insights into the behavior of plasma particles and the velocity space structures responsible for energy dissipation in plasmas. Understanding particle distribution, behavior, and the influence of cold ions in Earth's magnetosphere is crucial for advancing our knowledge of plasma physics and has practical implications for space weather and magnetospheric dynamics. Addressing the remaining uncertainties and challenges in measurements, analysis of non-Maxwellian distribution of ions is essential for a comprehensive understanding of space plasma environments.
利用磁层多尺度航天器（MMS）的高分辨率测量数据，对地球磁层中的速度分布函数进行了一项研究。分析聚焦于AZ非麦克斯韦分布，它是一种复杂的速度空间结构，呈现出矩的幂律分布。通过对AZ速度分布的谱指数施加约束，确定了最适合模拟地球磁层的分布。MMS数据的联合使用以及速度分布分析为等离子体粒子的行为以及等离子体中负责能量耗散的速度空间结构提供了新的见解。了解地球磁层中的粒子分布、行为以及冷离子的影响对于推进我们对等离子体物理学的认识至关重要，并且对空间天气和磁层动力学具有实际意义。解决测量中剩余的不确定性和挑战，对离子非麦克斯韦分布的分析对于全面理解空间等离子体环境至关重要。
