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Team led by graduate student at PPPL produces unique simulation of magnetic reconnection（图）
Team led graduate student PPPL produces unique magnetic reconnection
2017/9/20
Jonathan Ng, a Princeton University graduate student at the U.S. Department of Energy’s (DOE) Princeton Plasma Physics Laboratory (PPPL), has for the first time applied a fluid simulation to the space...
Theory of magnetic reconnection in solar and astrophysical plasmas
Theory magnetic reconnection solar astrophysical plasmas
2012/2/23
Magnetic reconnection is a fundamental process in a plasma that facilitates the release of energy stored in the magnetic field by permitting a change in the magnetic topology. In this article we prese...
Particle Acceleration by Magnetic Reconnection in AGNs and in the IGM
Particle Acceleration Magnetic Reconnection AGNs IGM
2011/10/9
There is no single mechanism by which fast particles are accelerated in astrophysical environments, and it is now recognized that the data require a rich variety of different mechanisms operating unde...
A Generalized Flux Function for Three-dimensional Magnetic Reconnection
Generalized Flux Function Three-dimensional Magnetic Reconnection
2011/10/18
The definition and measurement of magnetic reconnection in three-dimensional magnetic fields with multiple reconnection sites is a challenging problem, particularly in fields lacking null points. We p...
A Generalized Flux Function for Three-dimensional Magnetic Reconnection
Generalized Flux Function Three-dimensional Magnetic Reconnection Plasma Physics
2011/8/2
Abstract: The definition and measurement of magnetic reconnection in three-dimensional magnetic fields with multiple reconnection sites is a challenging problem, particularly in fields lacking null po...
High Lundquist Number Resistive MHD Simulations of Magnetic Reconnection: Searching for Secondary Island Formation
Lundquist Number Resistive MHD Simulations Magnetic Reconnection
2011/9/9
Recently, secondary island formation due to the tearing instability of the Sweet-Parker current sheet was identified as a possible mechanism that can lead to fast reconnection (less sensitive dependen...
The Internal-Collision-Induced Magnetic Reconnection and Turbulence (ICMART) Model of Gamma-Ray Bursts
gamma-rays burst general gamma-ray bursts individual GRB 080916C magnetic reconnection turbulence
2010/11/11
The recent Fermi observation of GRB 080916C shows that the bright photosphere emission associated with a putative fireball is missing, which suggests that the central engine likely launches a Poynting...
Jet deflection by very weak guide fields during magnetic reconnection
Jet deflection guide fields magnetic reconnection
2010/11/12
Simulations of antiparallel reconnection have shown collimated electron jets outflowing from the x-point, and associated highly elongated "outer electron diffusion regions." New PIC simulations with i...
A Reconnection Switch to Trigger Gamma-Ray Burst Jet Dissipation
accretion discs black hole physics galaxies jets gamma rays bursts MHD
2010/11/12
Prompt gamma-ray burst (GRB) emission requires some mechanism to dissipate an ultrarelativistic
jet. Internal shocks or some form of electromagnetic dissipation are candidate mechanisms.
Electron Holes and Heating in the Reconnection Dissipation Region
Electron Holes Heating Reconnection Dissipation Region
2010/4/1
Using particle-in-cell simulations and kinetic theory, we explore the current-driven turbulence and associated electron heating in the dissipation region during 3D magnetic reconnection with a guide f...
New Insights into Dissipation in the Electron Layer During Magnetic Reconnection
New Insights Magnetic Reconnection Electron Layer
2010/3/8
Detailed comparisons are reported between laboratory observations of electron-scale dissipation layers near a reconnecting X-line and direct two-dimensional full-particle simulations. Many experimenta...
Kinetic simulations of the coupling between current instabilities and reconnection in thin current sheets
Kinetic simulations current instabilities thin current sheets
2009/11/13
We investigate the coupling between current and tearing instability modes of a thin current sheet using the particle code GISMO. We identify pure tearing modes (kx≠ 0), instabilities in the current fl...
3D reconnection due to oblique modes:a simulation of Harris current sheets
3D reconnection oblique modes Harris current sheets
2009/11/13
Simulations in three dimensions of a Harris current sheet with mass ratio, mi/me = 180, and current sheet thickness, pi/L = 0.5, suggest the existence of a linearly unstable oblique mode, which is ind...
Evolution of magnetic helicity in the course of kinetic magnetic reconnection
magnetic helicity kinetic magnetic reconnection
2009/11/12
We investigate the evolution of magnetic helicity density in the course of 2D and 3D kinetic magnetic reconnection through thin current sheets. In 2D, the helicity density near a reconnection X-line b...
Evolution of magnetic helicity under kinetic magnetic reconnection:Part II B≠0 reconnection
magnetic helicity kinetic magnetic reconnection B≠0 reconnection
2009/11/12
We investigate the evolution of magnetic helicity under kinetic magnetic reconnection in thin current sheets. We use Harris sheet equilibria and superimpose an external magnetic guide field. Consequen...