Excitation of whistler mode waves in collisionless magnetic reconnection with a particle-in-cell simulation

<p>It is still unresolved that how magnetic reconnection is triggered in the collisionless environment. In this talk, we will present that the reconnection onset consists of two phases: the electron phase and ion phase. In the electron phase, the electrons are significantly energized and super-alfvenic electron jets are created while the ion bulk flows haven't been formed and the ions haven't been heated. Later on, the ion jets are produced together with the electron jets in the ion phase. The main reason for such two phases is discussed. A particle-in-cell simulation was performed to realize these two phases during reconnection onset.&#160;</p><p>&#160;</p>

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The double layers in the plasma sheet boundary layer during magnetic reconnection

Nonlinear Processes in Geophysics Discussions ◽

10.5194/npgd-1-1657-2014 ◽

2014 ◽

Vol 1 (2) ◽

pp. 1657-1671

Author(s):

J. Guo ◽

B. Yu

Keyword(s):

Boundary Layer ◽

Magnetic Reconnection ◽

Plasma Sheet ◽

Double Layers ◽

Plasma Sheet Boundary Layer ◽

Bipolar Structure ◽

Particle In Cell ◽

Cell Simulation ◽

Simulation Results ◽

Observation Results

Abstract. We studied the evolutions of double layers which appear after the magnetic reconnection through two-dimensional electromagnetic particle-in-cell simulation. The simulation results show that the double layers are formed in the plasma sheet boundary layer after magnetic reconnection. At first, the double layers which have unipolar structures are formed. And then the double layers turn into bipolar structures, which will couple with another new weak bipolar structure. Thus a new double layer or tripolar structure comes into being. The double layers found in our work are about several ten Debye lengths, which accords with the observation results. It is suggested that the electron beam formed during the magnetic reconnection is responsible for the production of the double layers.

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Formation of Pancake, Rolling‐pin, and Cigar Distributions of Energetic Electrons at the Dipolarization Fronts (DFs) Driven by Magnetic Reconnection: A two‐dimensional particle‐in‐cell simulation

Journal of Geophysical Research Space Physics ◽

10.1029/2021ja029939 ◽

2021 ◽

Author(s):

Kai Huang ◽

Quanming Lu ◽

San Lu ◽

Rongsheng Wang ◽

Shui Wang

Keyword(s):

Magnetic Reconnection ◽

Two Dimensional ◽

Energetic Electrons ◽

Particle In Cell ◽

Cell Simulation

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The Evolution of Collisionless Magnetic Reconnection from Electron Scales to Ion Scales

The Astrophysical Journal ◽

10.3847/1538-4357/ac2900 ◽

2021 ◽

Vol 922 (1) ◽

pp. 51

Author(s):

Dongkuan Liu ◽

Kai Huang ◽

Quanming Lu ◽

San Lu ◽

Rongsheng Wang ◽

...

Keyword(s):

Magnetic Reconnection ◽

Current Sheet ◽

High Speed ◽

Two Dimensional ◽

Ion Outflow ◽

Particle In Cell ◽

Electron Kinetics ◽

Guide Field ◽

Cell Simulation ◽

The Magnetic Field

Abstract It is generally accepted that collisionless magnetic reconnection is initiated on electron scales, which is mediated by electron kinetics. In this paper, by performing a two-dimensional particle-in-cell simulation, we investigate the transition of collisionless magnetic reconnection from electron scales to ion scales in a Harris current sheet with and without a guide field. The results show that after magnetic reconnection is triggered on electron scales, the electrons are first accelerated by the reconnection electric field around the X line, and then leave away along the outflow direction. In the Harris current sheet without a guide field, the electron outflow is symmetric and directed away from the X line along the center of the current sheet, while the existence of a guide field will distort the symmetry of the electron outflow. In both cases, the high-speed electron outflow is decelerated due to the existence of the magnetic field B z , then leading to the pileup of B z . With the increase of B z , the ions are accelerated by the Lorentz force in the outflow direction, and an ion outflow at about one Alfvén speed is at last formed. In this way, collisionless magnetic reconnection is transferred from the electron scales to the ion scales.

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Particle-in-cell simulation study of the scaling of asymmetric magnetic reconnection with in-plane flow shear

Physics of Plasmas ◽

10.1063/1.4960324 ◽

2016 ◽

Vol 23 (8) ◽

pp. 082107 ◽

Cited By ~ 4

Author(s):

C. E. Doss ◽

P. A. Cassak ◽

M. Swisdak

Keyword(s):

Magnetic Reconnection ◽

Simulation Study ◽

Flow Shear ◽

Plane Flow ◽

Particle In Cell ◽

Cell Simulation

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Collisionless magnetic reconnection: analytical model and PIC simulation comparison

Annales Geophysicae ◽

10.5194/angeo-27-905-2009 ◽

2009 ◽

Vol 27 (3) ◽

pp. 905-911 ◽

Cited By ~ 1

Author(s):

V. Semenov ◽

D. Korovinskiy ◽

A. Divin ◽

N. Erkaev ◽

H. Biernat

Keyword(s):

Electric Field ◽

Magnetic Reconnection ◽

Analytical Model ◽

Analytical Study ◽

Spatial Scales ◽

Magnetospheric Substorms ◽

Particle In Cell ◽

Shafranov Equation ◽

Cell Simulation ◽

Particles Trajectories

Abstract. Magnetic reconnection is believed to be responsible for various explosive processes in the space plasma including magnetospheric substorms. The Hall effect is proved to play a key role in the reconnection process. An analytical model of steady-state magnetic reconnection in a collisionless incompressible plasma is developed using the electron Hall MHD approximation. It is shown that the initial complicated system of equations may split into a system of independent equations, and the solution of the problem is based on the Grad-Shafranov equation for the magnetic potential. The results of the analytical study are further compared with a two-dimensional particle-in-cell simulation of reconnection. It is shown that both methods demonstrate a close agreement in the electron current and the magnetic and electric field structures obtained. The spatial scales of the acceleration region in the simulation and the analytical study are of the same order. Such features like particles trajectories and the in-plane electric field structure appear essentially similar in both models.

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