MMS Observations of Broadband Electrostatic Waves in Electron Diffusion Region of Magnetotail Reconnection

2021 ◽  
Vol 126 (3) ◽  
Author(s):  
Xiancai Yu ◽  
Quanming Lu ◽  
Rongsheng Wang ◽  
Kai Huang ◽  
Xinliang Gao ◽  
...  
Keyword(s):  
Diffusion Region ◽  
Electron Diffusion ◽  
Electrostatic Waves ◽  
Magnetotail Reconnection

Observation of non-gyrotropic electron distribution across the electron diffusion region in the magnetotail reconnection

2020 ◽  
Author(s):  
Xinmin Li ◽  
Quanming Lu
Keyword(s):  
Electric Field ◽  
Energy Range ◽  
Electron Distribution ◽  
Distribution Functions ◽  
Diffusion Region ◽  
Electron Diffusion ◽  
Vertical Distance ◽  
Magnetospheric Multiscale ◽  
Magnetotail Reconnection ◽  
First Time

<p>Using measurements by the Magnetospheric Multiscale (MMS) spacecraft in the magnetotail, we studied electron distribution functions across an electron diffusion region. The dependence of the non-gyrotropic distribution on the energy and vertical distance from the EDR mid-plane was revealed for the first time. The non-gyrotropic distribution was observed everywhere except for an extremely narrow layer right at the EDR mid-plane. The energy of the non-gyrotropic distribution increased with growth of the vertical distance from the mid-plane. For the electrons within certain energy range, they exhibited the non-gyrotropic distribution at the distance further away from the mid-plane than that expected from the meandering motion. The correlation between the crescent-shaped distribution with multiple stripes and the large Hall electric field was established. It appears that the measured non-gyrotropic distribution and the crescent-shaped distribution were caused by the meandering motion and the Hall electric field together.</p>

scholarly journals The Role of Upper Hybrid Waves in the Magnetotail Reconnection Electron Diffusion Region

2019 ◽  
Vol 881 (2) ◽  
pp. L28 ◽  
Author(s):  
K. Jiang ◽  
S. Y. Huang ◽  
Z. G. Yuan ◽  
F. Sahraoui ◽  
X. H. Deng ◽  
...  
Keyword(s):  
Diffusion Region ◽  
Electron Diffusion ◽  
Magnetotail Reconnection ◽  
Hybrid Waves

Reconstruction of the Electron Diffusion Region of Magnetotail Reconnection Seen by the MMS Spacecraft on 11 July 2017

2019 ◽  
Vol 124 (1) ◽  
pp. 122-138 ◽  
Author(s):  
H. Hasegawa ◽  
R. E. Denton ◽  
R. Nakamura ◽  
K. J. Genestreti ◽  
T. K. M. Nakamura ◽  
...  
Keyword(s):  
Diffusion Region ◽  
Electron Diffusion ◽  
Magnetotail Reconnection

Observation of Nongyrotropic Electron Distribution Across the Electron Diffusion Region in the Magnetotail Reconnection

2019 ◽  
Vol 46 (24) ◽  
pp. 14263-14273 ◽  
Author(s):  
Xinmin Li ◽  
Rongsheng Wang ◽  
Quanming Lu ◽  
Kyoung‐Joo Hwang ◽  
Qiugang Zong ◽  
...  
Keyword(s):  
Electron Distribution ◽  
Diffusion Region ◽  
Electron Diffusion ◽  
Magnetotail Reconnection

scholarly journals Identification of the Electron-Diffusion Region during Magnetic Reconnection in a Laboratory Plasma

2008 ◽  
Vol 101 (8) ◽  
Author(s):  
Yang Ren ◽  
Masaaki Yamada ◽  
Hantao Ji ◽  
Stefan P. Gerhardt ◽  
Russell Kulsrud
Keyword(s):  
Magnetic Reconnection ◽  
Diffusion Region ◽  
Laboratory Plasma ◽  
Electron Diffusion

Reconstruction of the electron diffusion region

2016 ◽  
Vol 121 (5) ◽  
pp. 4279-4290 ◽  
Author(s):  
B. U. Ö. Sonnerup ◽  
H. Hasegawa ◽  
R. E. Denton ◽  
T. K. M. Nakamura
Keyword(s):  
Diffusion Region ◽  
Electron Diffusion

Micro-scale tearing mode turbulence in the diffusion region during macro-scale evolution of turbulent reconnection

2021 ◽  
Author(s):  
Takuma Nakamura ◽  
Hiroshi Hasegawa ◽  
Tai Phan ◽  
Kevin Genestreti ◽  
Richard Denton ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Energy Conversion ◽  
Magnetic Reconnection ◽  
Diffusion Region ◽  
Electron Diffusion ◽  
Efficient Energy ◽  
Micro Scale ◽  
Island Evolution ◽  
Macro Scale ◽  
Scale Evolution

<p>Magnetic reconnection is a key fundamental process in collisionless plasmas that explosively converts magnetic energy to plasma kinetic and thermal energies through a change of magnetic field topology in an electron-scale central region called the electron diffusion region. Past simulations and observations demonstrated that this process causes efficient energy conversion through the formation of multiple macro-scale or micro-scale magnetic islands/flux ropes. However, how these different spatiotemporal scale phenomena are coupled is still poorly understood. In this study, to investigate the turbulent evolution of magnetic reconnection, we perform a new large-scale fully kinetic simulation of a thin current sheet considering a power-law spectrum of initial fluctuations in the magnetic field as frequently observed in the Earth’s magnetotail. The simulation demonstrates that during a macro-scale evolution of turbulent reconnection, the merging of macro-scale islands results in reduction of the rate of reconnection as well as the aspect ratio of the electron diffusion region. This allows the repeated, quick formation of new electron-scale islands within the electron diffusion region, leading to an efficient energy cascade between macro- and micro-scales. The simulation also demonstrates that a strong electron acceleration/heating occurs during the micro-scale island evolution within the EDR. These new findings indicate the importance of non-steady features of the EDR to comprehensively understand the energy conversion and cascade processes in collisionless reconnection.</p>

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