Kinetic structure of the sharp injection/dipolarization front in the flow-braking region

2009 ◽  
Vol 36 (21) ◽  
Author(s):  
V. Sergeev ◽  
V. Angelopoulos ◽  
S. Apatenkov ◽  
J. Bonnell ◽  
R. Ergun ◽  
...  
Keyword(s):  
Dipolarization Front

scholarly journals Periodic black auroral patches at the dawnside dipolarization front during a substorm

2011 ◽  
Vol 116 (A5) ◽  
Author(s):  
K. Sakaguchi ◽  
K. Shiokawa ◽  
E. Donovan ◽  
A. Nakajima ◽  
Y. Hiraki ◽  
...  
Keyword(s):  
Dipolarization Front

Investigation of energy conversion processes and wave activity related to dipolarization fronts observed by MMS

2021 ◽  
Author(s):  
Soboh Alqeeq ◽  
Olivier Le Contel ◽  
Patrick Canu ◽  
Alessandro Retino ◽  
Thomas Chust ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Energy Flow ◽  
Poynting Vector ◽  
Wave Activity ◽  
Electromagnetic Energy ◽  
Particle Measurements ◽  
Dipolarization Front ◽  
The Earth ◽  
Current Densities ◽  
Scale Properties

<p>In the present work, we consider four dipolarization front (DF) events detected by MMS spacecraft in the Earth’s magnetotail during a substorm on 23rd of July 2017 between 16:05 and 17:19 UT. From their ion scale properties, we show that these four DF events embedded in fast Earthward plasma flows have classical signatures with increases of Bz, velocity and temperature and a decrease of density across the DF. We compute and compare current densities obtained from magnetic and particle measurements and analyse the Ohm’s law. Then we describe the wave activity related to these DFs. We investigate energy conversion processes via J.E calculations and estimate the importance of the electromagnetic energy flow by computing the divergence of the Poynting vector. Finally we discuss the electromagnetic energy conservation in the context of these DFs.</p>

scholarly journals Rippled Electron‐Scale Structure of a Dipolarization Front

2018 ◽  
Vol 45 (22) ◽  
pp. 12,116-12,124 ◽  
Author(s):  
Dong‐Xiao Pan ◽  
Yuri V. Khotyaintsev ◽  
Daniel B. Graham ◽  
Andris Vaivads ◽  
Xu‐Zhi Zhou ◽  
...  
Keyword(s):  
Scale Structure ◽  
Dipolarization Front

Asymmetric Reconnection Within a Flux Rope‐Type Dipolarization Front

2020 ◽  
Vol 125 (1) ◽  
Author(s):  
A. T. Marshall ◽  
J. L. Burch ◽  
P. H. Reiff ◽  
J. M. Webster ◽  
R. B. Torbert ◽  
...  
Keyword(s):  
Flux Rope ◽  
Dipolarization Front

Energy Range of Electron Rolling Pin Distribution Behind Dipolarization Front

2019 ◽  
Vol 46 (5) ◽  
pp. 2390-2398 ◽  
Author(s):  
M. J. Zhao ◽  
H. S. Fu ◽  
C. M. Liu ◽  
Z. Z. Chen ◽  
Y. Xu ◽  
...  
Keyword(s):  
Energy Range ◽  
Dipolarization Front

scholarly journals Open boundary particle-in-cell simulation of dipolarization front propagation

2014 ◽  
Vol 119 (1) ◽  
pp. 185-201 ◽  
Author(s):  
Alex Klimas ◽  
Kyoung-Joo Hwang ◽  
Adolfo F. -Viñas ◽  
Melvyn L. Goldstein
Keyword(s):  
Front Propagation ◽  
Open Boundary ◽  
Particle In Cell ◽  
Dipolarization Front ◽  
Cell Simulation

scholarly journals Lower hybrid drift instability at a dipolarization front

2015 ◽  
Vol 120 (2) ◽  
pp. 1124-1132 ◽  
Author(s):  
A. Divin ◽  
Yu. V. Khotyaintsev ◽  
A. Vaivads ◽  
M. André
Keyword(s):  
Lower Hybrid ◽  
Dipolarization Front ◽  
Drift Instability

Observation of a Sharp Negative Dipolarization Front in the Reconnection Outflow Region

2011 ◽  
Vol 28 (10) ◽  
pp. 109402 ◽  
Author(s):  
Meng Zhou ◽  
Shi-Yong Huang ◽  
Xiao-Hua Deng ◽  
Ye Pang
Keyword(s):  
Dipolarization Front ◽  
Outflow Region

scholarly journals On the Presence and Thermalization of Cold Ions in the Exhaust of Antiparallel Symmetric Reconnection

2021 ◽  
Vol 8 ◽  
Author(s):  
Cecilia Norgren ◽  
Paul Tenfjord ◽  
Michael Hesse ◽  
Sergio Toledo-Redondo ◽  
Wen-Ya Li ◽  
...  
Keyword(s):  
Acoustic Waves ◽  
Pitch Angle ◽  
Equatorial Region ◽  
Neutral Plane ◽  
Ion Acoustic Waves ◽  
Particle In Cell ◽  
Dipolarization Front ◽  
Angle Scattering ◽  
Long Time ◽  
Cold Ions

Using fully kinetic 2.5 dimensional particle-in-cell simulations of anti-parallel symmetric magnetic reconnection, we investigate how initially cold ions are captured by the reconnection process, and how they evolve and behave in the exhaust. We find that initially cold ions can remain cold deep inside the exhaust. Cold ions that enter the exhaust downstream of active separatrices, closer to the dipolarization front, appear as cold counter-streaming beams behind the front. In the off-equatorial region, these cold ions generate ion-acoustic waves that aid in the thermalization both of the incoming and outgoing populations. Closest to the front, due to the stronger magnetization, the ions can remain relatively cold during the neutral plane crossing. In the intermediate exhaust, the weaker magnetization leads to enhanced pitch angle scattering and reflection. Cold ions that enter the exhaust closer to the X line, at active separatrices, evolve into a thermalized exhaust. Here, the cold populations are heated through a combination of thermalization at the separatrices and pitch angle scattering in the curved magnetic field around the neutral plane. Depending on where the ions enter the exhaust, and how long time they have spent there, they are accelerated to different energies. The superposition of separately thermalized ion populations that have been accelerated to different energies form the hot exhaust population.

scholarly journals THEMIS observations of an earthward-propagating dipolarization front

2009 ◽  
Vol 36 (14) ◽  
Author(s):  
A. Runov ◽  
V. Angelopoulos ◽  
M. I. Sitnov ◽  
V. A. Sergeev ◽  
J. Bonnell ◽  
...  
Keyword(s):  
Dipolarization Front
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