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Dynamic magnetic island coalescence and associated electron acceleration

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Dynamic magnetic island coalescence and associated electron acceleration. / Tanaka, Kentaro G.; Fujimoto, Masaki; Badman, Sarah V. et al.
In: Physics of Plasmas, Vol. 18, No. 2, 022903, 18.02.2011.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Tanaka, KG, Fujimoto, M, Badman, SV & Shinohara, I 2011, 'Dynamic magnetic island coalescence and associated electron acceleration', Physics of Plasmas, vol. 18, no. 2, 022903. https://doi.org/10.1063/1.3554660

APA

Tanaka, K. G., Fujimoto, M., Badman, S. V., & Shinohara, I. (2011). Dynamic magnetic island coalescence and associated electron acceleration. Physics of Plasmas, 18(2), Article 022903. https://doi.org/10.1063/1.3554660

Vancouver

Tanaka KG, Fujimoto M, Badman SV, Shinohara I. Dynamic magnetic island coalescence and associated electron acceleration. Physics of Plasmas. 2011 Feb 18;18(2):022903. doi: 10.1063/1.3554660

Author

Tanaka, Kentaro G. ; Fujimoto, Masaki ; Badman, Sarah V. et al. / Dynamic magnetic island coalescence and associated electron acceleration. In: Physics of Plasmas. 2011 ; Vol. 18, No. 2.

Bibtex

@article{e0e483a673344de6a6c461be26b7552b,
title = "Dynamic magnetic island coalescence and associated electron acceleration",
abstract = "The system size dependence of electron acceleration during large-scale magnetic island coalescence is studied via a two-dimensional particle-in-cell simulation. Using a simulation box that is larger than those used in previous studies, injection by merging line acceleration and subsequent reacceleration inside a merged island are found to be the mechanisms for producing the most energetic electrons. This finding and knowledge of the reacceleration process enable us to predict that the high energy end of the electron energy spectrum continues to expand as the merged island size increases. Both the merging line acceleration and the reacceleration within a merged island require the island coalescence process to be so dynamic as to involve fast in-flow toward the center of a merged island. Once this condition is met in an early stage of the coalescence, it is likely to stay in the subsequent phase. In other words, if the thin elongated current sheet is initially able to host the dynamic magnetic island coalescence process, it will be a site where repeated upgrades in the maximum energy of electrons occur in a systematic manner.",
keywords = "plasma confinement, plasma simulation",
author = "Tanaka, {Kentaro G.} and Masaki Fujimoto and Badman, {Sarah V.} and Iku Shinohara",
year = "2011",
month = feb,
day = "18",
doi = "10.1063/1.3554660",
language = "English",
volume = "18",
journal = "Physics of Plasmas",
issn = "1070-664X",
publisher = "American Institute of Physics Inc.",
number = "2",

}

RIS

TY - JOUR

T1 - Dynamic magnetic island coalescence and associated electron acceleration

AU - Tanaka, Kentaro G.

AU - Fujimoto, Masaki

AU - Badman, Sarah V.

AU - Shinohara, Iku

PY - 2011/2/18

Y1 - 2011/2/18

N2 - The system size dependence of electron acceleration during large-scale magnetic island coalescence is studied via a two-dimensional particle-in-cell simulation. Using a simulation box that is larger than those used in previous studies, injection by merging line acceleration and subsequent reacceleration inside a merged island are found to be the mechanisms for producing the most energetic electrons. This finding and knowledge of the reacceleration process enable us to predict that the high energy end of the electron energy spectrum continues to expand as the merged island size increases. Both the merging line acceleration and the reacceleration within a merged island require the island coalescence process to be so dynamic as to involve fast in-flow toward the center of a merged island. Once this condition is met in an early stage of the coalescence, it is likely to stay in the subsequent phase. In other words, if the thin elongated current sheet is initially able to host the dynamic magnetic island coalescence process, it will be a site where repeated upgrades in the maximum energy of electrons occur in a systematic manner.

AB - The system size dependence of electron acceleration during large-scale magnetic island coalescence is studied via a two-dimensional particle-in-cell simulation. Using a simulation box that is larger than those used in previous studies, injection by merging line acceleration and subsequent reacceleration inside a merged island are found to be the mechanisms for producing the most energetic electrons. This finding and knowledge of the reacceleration process enable us to predict that the high energy end of the electron energy spectrum continues to expand as the merged island size increases. Both the merging line acceleration and the reacceleration within a merged island require the island coalescence process to be so dynamic as to involve fast in-flow toward the center of a merged island. Once this condition is met in an early stage of the coalescence, it is likely to stay in the subsequent phase. In other words, if the thin elongated current sheet is initially able to host the dynamic magnetic island coalescence process, it will be a site where repeated upgrades in the maximum energy of electrons occur in a systematic manner.

KW - plasma confinement

KW - plasma simulation

U2 - 10.1063/1.3554660

DO - 10.1063/1.3554660

M3 - Journal article

VL - 18

JO - Physics of Plasmas

JF - Physics of Plasmas

SN - 1070-664X

IS - 2

M1 - 022903

ER -