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Title: Nonthermally Dominated Electron Acceleration during Magnetic Reconnection in a Low-beta Plasma

Abstract

This work was motivated by electron acceleration during solar flares. After some introductory remarks on proposed particle acceleration mechanisms and questions needing answers, dynamic simulations and simulation results are presented including energy spectra and the formation of the power law distribution. In summary, magnetic reconnection is highly efficient at converting the free magnetic energy stored in a magnetic shear and accelerating electrons to nonthermal energies in low-β regime. The nonthermal electrons have a dominant fraction and form power-law energy spectra with spectral index p ~ 1 in low-β regime. Electrons are preferentially accelerated along the curvature drift direction along the electric field induced by the reconnection outflow. The results can be applied to explain the observations of electron acceleration during solar flares.

Authors:
 [1]
  1. Los Alamos National Laboratory
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
DOE/LANL
OSTI Identifier:
1196184
Report Number(s):
LA-UR-15-25569
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Conference
Resource Relation:
Conference: Plasma Energization: Exchanges between Fluid and Kinetic Scales ; 2015-05-04 - 2015-05-06 ; Los Alamos, New Mexico, United States
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; Astronomy and Astrophysics

Citation Formats

Li, Xiaocan. Nonthermally Dominated Electron Acceleration during Magnetic Reconnection in a Low-beta Plasma. United States: N. p., 2015. Web.
Li, Xiaocan. Nonthermally Dominated Electron Acceleration during Magnetic Reconnection in a Low-beta Plasma. United States.
Li, Xiaocan. Tue . "Nonthermally Dominated Electron Acceleration during Magnetic Reconnection in a Low-beta Plasma". United States. https://www.osti.gov/servlets/purl/1196184.
@article{osti_1196184,
title = {Nonthermally Dominated Electron Acceleration during Magnetic Reconnection in a Low-beta Plasma},
author = {Li, Xiaocan},
abstractNote = {This work was motivated by electron acceleration during solar flares. After some introductory remarks on proposed particle acceleration mechanisms and questions needing answers, dynamic simulations and simulation results are presented including energy spectra and the formation of the power law distribution. In summary, magnetic reconnection is highly efficient at converting the free magnetic energy stored in a magnetic shear and accelerating electrons to nonthermal energies in low-β regime. The nonthermal electrons have a dominant fraction and form power-law energy spectra with spectral index p ~ 1 in low-β regime. Electrons are preferentially accelerated along the curvature drift direction along the electric field induced by the reconnection outflow. The results can be applied to explain the observations of electron acceleration during solar flares.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2015},
month = {7}
}

Conference:
Other availability
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