skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: The role of three-dimensional transport in driving enhanced electron acceleration during magnetic reconnection

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/1.4986211· OSTI ID:1497847
ORCiD logo [1];  [2];  [2]
  1. Univ. of Maryland, College Park, MD (United States); NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States); Univ. Corporation for Atmospheric Research, Boulder, CO (United States)
  2. Univ. of Maryland, College Park, MD (United States)

Magnetic reconnection is an important driver of energetic particles in many astrophysical phenomena. Using kinetic particle-in-cell simulations, we explore the impact of three-dimensional reconnection dynamics on the efficiency of particle acceleration. In two-dimensional systems, Alfvénic outflows expel energetic electrons into flux ropes where they become trapped and disconnected from acceleration regions. However, in three-dimensional systems these flux ropes develop an axial structure that enables particles to leak out and return to acceleration regions. This requires a finite guide field so that particles may move quickly along the flux rope axis. We show that greatest energetic electron production occurs when the guide field is of the same order as the reconnecting component: large enough to facilitate strong transport, but not so large as to throttle the dominant Fermi mechanism responsible for efficient electron acceleration. This suggests a natural explanation for the envelope of electron acceleration during the impulsive phase of eruptive flares.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE; National Science Foundation (NSF); National Aeronautics and Space Administration (NASA)
Grant/Contract Number:
AGS1202330; PHY1102479; NNX11AQ93H; APL-975268; NNX08AV87G; NAS 5-98033
OSTI ID:
1497847
Journal Information:
Physics of Plasmas, Vol. 24, Issue 9; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 72 works
Citation information provided by
Web of Science

References (56)

Suppression of Energetic Electron Transport in Flares by Double Layers journal August 2012
Ion heating resulting from pickup in magnetic reconnection exhausts: ION PICKUP journal May 2009
The mechanisms of electron heating and acceleration during magnetic reconnection journal September 2014
Particle Acceleration in Reconnecting Current Sheets with a Nonzero Magnetic Field journal May 1996
Stochastic Acceleration in Turbulent Electric Fields Generated by 3D Reconnection journal April 2006
Three-dimensional particle simulations of collisionless magnetic reconnection journal January 2002
Electron acceleration in three-dimensional magnetic reconnection with a guide field journal October 2015
Magnetohydrodynamic Simulations of Reconnection and Particle Acceleration: Three-Dimensional Effects journal June 2011
The Generation of Nonthermal Particles in the Relativistic Magnetic Reconnection of Pair Plasmas journal November 2001
Stochastic Particle Acceleration in Multiple Magnetic Islands during Reconnection journal March 2012
Gamma-Ray Flares from the Crab Nebula journal January 2011
Efficient acceleration and radiation in Poynting flux powered GRB outflows journal August 2002
Production of Energetic Electrons during Magnetic Reconnection journal March 2005
Electron acceleration from contracting magnetic islands during reconnection journal October 2006
Electron acceleration in the reconnection diffusion region: Cluster observations: ELECTRON ACCELERATION OBSERVATIONS journal June 2012
Relativistic Reconnection: an Efficient Source of Non-Thermal Particles journal February 2014
Relativistic electron production during guide field magnetic reconnection journal January 2006
Ion and electron heating during magnetic reconnection in weakly collisional plasmas journal November 2014
Formation of Hard Power Laws in the Energetic Particle Spectra Resulting from Relativistic Magnetic Reconnection journal October 2014
The Power-Law Spectra of Energetic Particles During Multi-Island Magnetic Reconnection journal December 2012
Observation of energetic electrons within magnetic islands journal November 2007
Electron Heat Transport in a Tokamak with Destroyed Magnetic Surfaces journal January 1978
Discovery of Powerful Gamma-Ray Flares from the Crab Nebula journal January 2011
Role of electron physics in the development of turbulent magnetic reconnection in collisionless plasmas journal April 2011
Wind/SWE observations of firehose constraint on solar wind proton temperature anisotropy: FIREHOSE CONSTRAINT ON PROTON ANISOTROPY journal September 2002
Three-dimensional simulations of the orientation and structure of reconnection X-lines journal November 2010
A Magnetic Reconnection Mechanism for the Generation of Anomalous Cosmic rays journal January 2010
An Observational Overview of Solar Flares journal August 2011
The Acceleration of ions in Solar Flares During Magnetic Reconnection journal November 2011
Evidence for Electron Acceleration up to 300 k e V in the Magnetic Reconnection Diffusion Region of Earth’s Magnetotail journal October 2002
RHESSI Observations of Particle Acceleration and Energy Release in an Intense Solar Gamma-Ray Line Flare journal September 2003
A Magnetic Reconnection Mechanism for ion Acceleration and Abundance Enhancements in Impulsive Flares journal June 2009
Reconnection-Powered Linear Accelerator and Gamma-Ray Flares in the crab Nebula journal August 2011
Particle Acceleration and Plasma Dynamics During Magnetic Reconnection in the Magnetically Dominated Regime journal June 2015
Suprathermal electron acceleration in magnetic reconnection journal November 2001
Large-scale electron acceleration by parallel electric fields during magnetic reconnection journal February 2012
Electron Acceleration by Multi-Island Coalescence journal April 2010
Adiabatic charged-particle motion journal January 1963
Electron heating during magnetic reconnection: A simulation scaling study journal December 2014
Kappa Distribution Model for hard X-Ray Coronal Sources of Solar Flares journal January 2013
Magnetic Fluctuation Power Near Proton Temperature Anisotropy Instability Thresholds in the Solar Wind journal November 2009
The Mechanisms of Electron Acceleration During Multiple x line Magnetic Reconnection with a Guide Field journal April 2016
Magnetic structure of pulsar winds journal August 1994
Measurements of the Coronal Acceleration Region of a Solar Flare journal April 2010
The competition of electron and ion heating during magnetic reconnection: PARTITION OF HEATING IN RECONNECTION journal November 2015
Particle acceleration during magnetic reconnection in a low-beta pair plasma journal May 2016
Stochastic Aspects of Magnetic Lines of Force with Application to Cosmic-Ray Propagation journal February 1969
NONTHERMALLY DOMINATED ELECTRON ACCELERATION DURING MAGNETIC RECONNECTION IN A LOW- β PLASMA journal September 2015
Formation of a localized acceleration potential during magnetic reconnection with a guide field journal May 2009
The Extent of Power-Law Energy Spectra in Collisionless Relativistic Magnetic Reconnection in pair Plasmas journal December 2015
Finite-Resistivity Instabilities of a Sheet Pinch journal January 1963
Force-free equilibria and reconnection of the magnetic field lines in collisionless plasma configurations journal March 2001
Cluster observations of energetic electrons and electromagnetic fields within a reconnecting thin current sheet in the Earth's magnetotail: ENERGETIC ELECTRONS IN CURRENT SHEET journal December 2008
Computing the reconnection rate in turbulent kinetic layers by using electron mixing to identify topology journal May 2014
Parallel electric fields are inefficient drivers of energetic electrons in magnetic reconnection journal December 2016
The Effects of Plasma beta and Anisotropy Instabilities on the Dynamics of Reconnecting Magnetic Fields in the Heliosheath journal November 2011

Cited By (28)

Intense Electric Fields and Electron-Scale Substructure Within Magnetotail Flux Ropes as Revealed by the Magnetospheric Multiscale Mission journal September 2018
MMS Observations of Plasma Heating Associated With FTE Growth journal November 2019
Formation of power law spectra of energetic electrons during multiple X line magnetic reconnection with a guide field journal July 2018
Turbulent electromagnetic fields at sub-proton scales: Two-fluid and full-kinetic plasma simulations journal January 2019
A computational model for exploring particle acceleration during reconnection in macroscale systems journal January 2019
Particle acceleration and fast magnetic reconnection journal August 2019
Role of magnetic field curvature in magnetohydrodynamic turbulence journal July 2019
Particle heating and energy partition in low- β guide field reconnection with kinetic Riemann simulations journal July 2019
3D turbulent reconnection: Theory, tests, and astrophysical implications journal January 2020
Large-scale parallel electric fields and return currents in a global simulation model journal October 2019
Power-law Statistics of Driven Reconnection in the Magnetically Closed Corona journal January 2018
Two-stage Electron Acceleration by 3D Collisionless Guide-field Magnetic Reconnection journal September 2018
Self-consistent Energetic Particle Acceleration by Contracting and Reconnecting Small-scale Flux Ropes: The Governing Equations journal September 2018
On the Broadband Synchrotron Spectra of Pulsar Wind Nebulae journal February 2019
Current Sheets, Magnetic Islands, and Associated Particle Acceleration in the Solar Wind as Observed by Ulysses near the Ecliptic Plane journal August 2019
Formation of Power-law Electron Energy Spectra in Three-dimensional Low- β Magnetic Reconnection journal October 2019
Scattering of Energetic Electrons by Heat-flux-driven Whistlers in Flares journal December 2019
Modeling Energetic Particle Acceleration and Transport in a Solar Wind Region with Contracting and Reconnecting Small-scale Flux Ropes at Earth Orbit journal December 2019
Electron Acceleration from Expanding Magnetic Vortices During Reconnection with a Guide Field journal January 2020
Two-stage electron acceleration by 3D collisionless guide field magnetic reconnection text January 2017
Power-Law Statistics Of Driven Reconnection In The Magnetically Closed Corona text January 2018
Turbulent electromagnetic fields at sub-proton scales: two-fluid and full-kinetic plasma simulations text January 2018
On the broad-band synchrotron spectra of pulsar wind nebulae text January 2018
Particle acceleration and fast magnetic reconnection text January 2019
Large-Scale Parallel Electric Fields and Return Currents in a Global Simulation Model text January 2019
3D Turbulent Reconnection: Theory, Tests and Astrophysical Implications text January 2020
A computational model for exploring particle acceleration during reconnection in macro-scale systems text January 2018
Measurement of magnetic field and relativistic electrons along a solar flare current sheet text January 2020

Similar Records

Direct Observation of Two-step Magnetic Reconnection in a Solar Flare
Journal Article · Thu Aug 10 00:00:00 EDT 2017 · Astrophysical Journal Letters · OSTI ID:1497847

PLASMOID EJECTIONS AND LOOP CONTRACTIONS IN AN ERUPTIVE M7.7 SOLAR FLARE: EVIDENCE OF PARTICLE ACCELERATION AND HEATING IN MAGNETIC RECONNECTION OUTFLOWS
Journal Article · Sat Apr 20 00:00:00 EDT 2013 · Astrophysical Journal · OSTI ID:1497847

A MODEL FOR THE ESCAPE OF SOLAR-FLARE-ACCELERATED PARTICLES
Journal Article · Wed Jul 10 00:00:00 EDT 2013 · Astrophysical Journal · OSTI ID:1497847