comparisons of electron acceleration efficiency among different structures during magnetic reconnection: a cluster multicase study
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2015
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Abstract
Magnetic reconnection has long been believed to be an efficient engine for
energetic electrons production. Four different structures have been proposed
for electrons being energized: flux pileup region, density cavity
located around the separatrix, magnetic island and thin current sheet. In
this paper, we compare the electron acceleration efficiency among these
structures based on 12 magnetotail reconnection events observed by the
Cluster spacecraft in 2001–2006. We used the flux ratio between the
energetic electrons (> 50 keV) and lower energy electrons
(< 26 keV) to quantify the electron acceleration efficiency. We do
not find any specific sequence in which electrons are accelerated within
these structures, though the flux pileup region, magnetic island and thin
current sheet have higher probabilities to reach the maximum efficiency
among the four structures than the density cavity. However, the most
efficient electron energization usually occurs outside these structures. We
suggest that other structures may also play important roles in energizing
electrons. Our results could provide important constraints for the further
modeling of electron acceleration during magnetic reconnection.
| Reference Key |
zhou2015annalescomparisons
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|---|---|
| Authors | ;M. Zhou;M. Zhou;T. Li;T. Li;X. Deng;S. Huang;H. Li |
| Journal | journal of food measurement and characterization |
| Year | 2015 |
| DOI |
10.5194/angeo-33-1469-2015
|
| URL | |
| Keywords |
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