scholarly journals Density cavity in magnetic reconnection diffusion region in the presence of guide field

2011 ◽  
Vol 116 (A6) ◽  
pp. n/a-n/a ◽  
Author(s):  
M. Zhou ◽  
Y. Pang ◽  
X. H. Deng ◽  
Z. G. Yuan ◽  
S. Y. Huang
Keyword(s):  
Magnetic Reconnection ◽  
Diffusion Region ◽  
Guide Field

scholarly journals Magnetospheric Multiscale Observations of the Electron Diffusion Region of Large Guide Field Magnetic Reconnection

2016 ◽  
Vol 117 (1) ◽  
Author(s):  
S. Eriksson ◽  
F. D. Wilder ◽  
R. E. Ergun ◽  
S. J. Schwartz ◽  
P. A. Cassak ◽  
...  
Keyword(s):  
Magnetic Reconnection ◽  
Diffusion Region ◽  
Electron Diffusion ◽  
Guide Field ◽  
Magnetospheric Multiscale

Extension of the Electron Diffusion Region in a Guide Field Magnetic Reconnection at Magnetopause

2020 ◽  
Vol 892 (1) ◽  
pp. L5 ◽  
Author(s):  
Z. H. Zhong ◽  
M. Zhou ◽  
R. X. Tang ◽  
X. H. Deng ◽  
Y. V. Khotyaintsev ◽  
...  
Keyword(s):  
Magnetic Reconnection ◽  
Diffusion Region ◽  
Electron Diffusion ◽  
Guide Field

scholarly journals Magnetic reconnection driven by intense lasers

2018 ◽  
Vol 6 ◽  
Author(s):  
Jiayong Zhong ◽  
Xiaoxia Yuan ◽  
Bo Han ◽  
Wei Sun ◽  
Yongli Ping
Keyword(s):  
Magnetic Reconnection ◽  
Target Surface ◽  
Diffusion Region ◽  
High Power Laser ◽  
Power Laser ◽  
Laser Plasma Interactions ◽  
Guide Field ◽  
Laser Plasmas ◽  
Basic Physics ◽  
Solar Plasmas

Laser-driven magnetic reconnection (LDMR) occurring with self-generated B fields has been experimentally and theoretically studied extensively, where strong B fields of more than megagauss are spontaneously generated in high-power laser–plasma interactions, which are located on the target surface and produced by non-parallel temperature and density gradients of expanding plasmas. For properties of the short-lived and strong B fields in laser plasmas, LDMR opened up a new territory in a parameter regime that has never been exploited before. Here we review the recent results of LDMR taking place in both high and low plasma beta environments. We aim to understand the basic physics processes of magnetic reconnection, such as particle accelerations, scale of the diffusion region, and guide field effects. Some applications of experimental results are also given especially for space and solar plasmas.

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

The role of electron heat flux in guide-field magnetic reconnection

2004 ◽  
Vol 11 (12) ◽  
pp. 5387-5397 ◽  
Author(s):  
Michael Hesse ◽  
Masha Kuznetsova ◽  
Joachim Birn
Keyword(s):  
Heat Flux ◽  
Magnetic Reconnection ◽  
Guide Field ◽  
Electron Heat

scholarly journals The role of guide field in magnetic reconnection driven by island coalescence

2017 ◽  
Vol 24 (2) ◽  
pp. 022124 ◽  
Author(s):  
A. Stanier ◽  
W. Daughton ◽  
Andrei N. Simakov ◽  
L. Chacón ◽  
A. Le ◽  
...  
Keyword(s):  
Magnetic Reconnection ◽  
Guide Field ◽  
Island Coalescence

scholarly journals Plasma waves around separatrix in collisionless magnetic reconnection with weak guide field

2015 ◽  
Vol 120 (8) ◽  
pp. 6309-6319 ◽  
Author(s):  
Yangao Chen ◽  
Keizo Fujimoto ◽  
Chijie Xiao ◽  
Hantao Ji
Keyword(s):  
Magnetic Reconnection ◽  
Plasma Waves ◽  
Guide Field

Formation of non-thermal electron velocity distribution functions in kinetic magnetic reconnection

2021 ◽  
Author(s):  
Xin Yao ◽  
Patricio A. Muñoz ◽  
Jörg Büchner
Keyword(s):  
Magnetic Field ◽  
Free Energy ◽  
Field Strength ◽  
Magnetic Reconnection ◽  
Electron Beams ◽  
Distribution Functions ◽  
Electron Velocity ◽  
Diffusion Region ◽  
Electron Velocity Distribution ◽  
Velocity Distribution Functions

<div> <div>Magnetic reconnection can convert magnetic energy into non-thermal particle energy in the form of electron beams. Those accelerated electrons can, in turn, cause radio emission in environments such as solar flares. The actual properties of those electron velocity distribution functions (EVDFs) generated by reconnection are still not well understood. In particular the properties that are relevant for the micro-instabilities responsible for radio emission. We aim thus at characterizing the electron distributions functions generated by 3D magnetic reconnection by means of fully kinetic particle-in-cell (PIC) code simulations. Our goal is to characterize the possible sources of free energy of the generated EVDFs in dependence on an external (guide) magnetic field strength. We find that: (1) electron beams with positive gradients in their parallel (to the local magnetic field direction) distribution functions are observed in both diffusion region (parallel crescent-shaped EVDFs) and separatrices (bump-on-tail EVDFs). These non-thermal EVDFs cause counterstreaming and bump-on-tail instabilities. These electrons are adiabatic and preferentially accelerated by a parallel electric field in regions where the magnetic moment is conserved. (2) electron beams with positive gradients in their perpendicular distribution functions are observed in regions with weak magnetic field strength near the current sheet midplane. The characteristic crescent-shaped EVDFs (in perpendicular velocity space) are observed in the diffusion region. These non-thermal EVDFs can cause electron cyclotron maser instabilities. These non-thermal electrons in perpendicular velocity space are mainly non-adiabatic. Their EVDFs are attributed to electrons experiencing an E×B drift and meandering motion. (3) As the guide field strength increases, the number of locations in the current sheet with distributions functions featuring a perpendicular source of free energy significantly decreases.</div> </div>

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