scholarly journals Hybrid simulations of magnetic reconnection with kinetic ions and fluid electron pressure anisotropy

2016 ◽  
Vol 23 (3) ◽  
pp. 032114 ◽  
Author(s):  
A. Le ◽  
W. Daughton ◽  
H. Karimabadi ◽  
J. Egedal
Keyword(s):  
Magnetic Reconnection ◽  
Electron Pressure ◽  
Pressure Anisotropy ◽  
Hybrid Simulations

scholarly journals Scaling laws for magnetic reconnection, set by regulation of the electron pressure anisotropy to the firehose threshold

2015 ◽  
Vol 42 (24) ◽  
pp. 10,549-10,556 ◽  
Author(s):  
O. Ohia ◽  
J. Egedal ◽  
V. S. Lukin ◽  
W. Daughton ◽  
A. Le
Keyword(s):  
Magnetic Reconnection ◽  
Scaling Laws ◽  
Electron Pressure ◽  
Pressure Anisotropy

Model of electron pressure anisotropy in the electron diffusion region of collisionless magnetic reconnection

2010 ◽  
Vol 17 (12) ◽  
pp. 122102 ◽  
Author(s):  
A. Divin ◽  
S. Markidis ◽  
G. Lapenta ◽  
V. S. Semenov ◽  
N. V. Erkaev ◽  
...  
Keyword(s):  
Magnetic Reconnection ◽  
Diffusion Region ◽  
Electron Diffusion ◽  
Electron Pressure ◽  
Pressure Anisotropy

Effects of electron pressure anisotropy on current sheet configuration

2016 ◽  
Vol 23 (9) ◽  
pp. 092901 ◽  
Author(s):  
A. V. Artemyev ◽  
I. Y. Vasko ◽  
V. Angelopoulos ◽  
A. Runov
Keyword(s):  
Current Sheet ◽  
Electron Pressure ◽  
Pressure Anisotropy

scholarly journals Onset of magnetic reconnection in a collisionless, high- plasma

2019 ◽  
Vol 85 (1) ◽  
Author(s):  
Andrew Alt ◽  
Matthew W. Kunz
Keyword(s):  
Magnetic Reconnection ◽  
Collisionless Plasma ◽  
High Plasma ◽  
Tearing Modes ◽  
Associated Production ◽  
Pressure Anisotropy ◽  
Low Threshold ◽  
Collisionless Reconnection ◽  
Field Lines ◽  
The Impact

In a magnetized, collisionless plasma, the magnetic moment of the constituent particles is an adiabatic invariant. An increase in the magnetic-field strength in such a plasma thus leads to an increase in the thermal pressure perpendicular to the field lines. Above a$\unicode[STIX]{x1D6FD}$-dependent threshold (where$\unicode[STIX]{x1D6FD}$is the ratio of thermal to magnetic pressure), this pressure anisotropy drives the mirror instability, producing strong distortions in the field lines on ion-Larmor scales. The impact of this instability on magnetic reconnection is investigated using a simple analytical model for the formation of a current sheet (CS) and the associated production of pressure anisotropy. The difficulty in maintaining an isotropic, Maxwellian particle distribution during the formation and subsequent thinning of a CS in a collisionless plasma, coupled with the low threshold for the mirror instability in a high-$\unicode[STIX]{x1D6FD}$plasma, imply that the geometry of reconnecting magnetic fields can differ radically from the standard Harris-sheet profile often used in simulations of collisionless reconnection. As a result, depending on the rate of CS formation and the initial CS thickness, tearing modes whose growth rates and wavenumbers are boosted by this difference may disrupt the mirror-infested CS before standard tearing modes can develop. A quantitative theory is developed to illustrate this process, which may find application in the tearing-mediated disruption of kinetic magnetorotational ‘channel’ modes.

scholarly journals Experimental Verification of the Role of Electron Pressure in Fast Magnetic Reconnection with a Guide Field

2017 ◽  
Vol 118 (12) ◽  
Author(s):  
W. Fox ◽  
F. Sciortino ◽  
A. v. Stechow ◽  
J. Jara-Almonte ◽  
J. Yoo ◽  
...  
Keyword(s):  
Magnetic Reconnection ◽  
Experimental Verification ◽  
Electron Pressure ◽  
Guide Field

scholarly journals Polarization of thermal bremsstrahlung emission due to electron pressure anisotropy

2016 ◽  
Vol 461 (2) ◽  
pp. 2162-2173 ◽  
Author(s):  
S. V. Komarov ◽  
I. I. Khabibullin ◽  
E. M. Churazov ◽  
A. A. Schekochihin
Keyword(s):  
Electron Pressure ◽  
Pressure Anisotropy ◽  
Bremsstrahlung Emission ◽  
Thermal Bremsstrahlung

On the Gradient of the Electron Pressure in Anti-Parallel Magnetic Reconnection

2015 ◽  
Vol 32 (4) ◽  
pp. 045201
Author(s):  
Huan-Yu Wang ◽  
Can Huang ◽  
Quan-Ming Lu ◽  
Shui Wang
Keyword(s):  
Magnetic Reconnection ◽  
Electron Pressure

scholarly journals Numerical study of non-gyrotropic electron pressure effects in collisionless magnetic reconnection

2021 ◽  
Vol 28 (7) ◽  
pp. 072108
Author(s):  
A. Sladkov ◽  
R. Smets ◽  
N. Aunai ◽  
A. Korzhimanov
Keyword(s):  
Magnetic Reconnection ◽  
Numerical Study ◽  
Pressure Effects ◽  
Electron Pressure
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