Diffusion regions and 3D energy mode development in spontaneous reconnection
The understanding of magnetic reconnection in three-dimensions (3D) is far shallower than its counterpart in two-dimensions due to its potential complication, not to mention the evolving of the spontaneously growing turbulence. We investigate the reason for reconnection acceleration on the character...
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| Veröffentlicht in: | Physics of plasmas 2019-07, Vol.26 (7) |
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| creator | Wang, Shuoyang Yokoyama, Takaaki |
| description | The understanding of magnetic reconnection in three-dimensions (3D) is far shallower than its counterpart in two-dimensions due to its potential complication, not to mention the evolving of the spontaneously growing turbulence. We investigate the reason for reconnection acceleration on the characters and development of diffusion regions and sheared 3D energy modes (energy modes that are not parallel to the antiparallel magnetic fields) during the turbulence building stage. We found that multiple reconnection layers emerge due to the growth of 3D sheared tearing instability. Diffusion regions in adjacent reconnection layers form an inflow-outflow coupling that enhances the local reconnection. Further coupling of the existing energy modes breeds new energy modes near the current sheet edge. As reconnection layers span and interact with each other across the whole current sheet, global magnetic energy consumption accelerates. The significant contribution of 3D energy modes and their interaction to the reconnection rate enhancement seems to be independent of magnetic diffusivity. On the other hand, the global guide field changes the layout of the 3D reconnection layer and thus determines whether the system is fast-reconnection-preferable. |
| doi_str_mv | 10.1063/1.5098129 |
| format | Article |
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We investigate the reason for reconnection acceleration on the characters and development of diffusion regions and sheared 3D energy modes (energy modes that are not parallel to the antiparallel magnetic fields) during the turbulence building stage. We found that multiple reconnection layers emerge due to the growth of 3D sheared tearing instability. Diffusion regions in adjacent reconnection layers form an inflow-outflow coupling that enhances the local reconnection. Further coupling of the existing energy modes breeds new energy modes near the current sheet edge. As reconnection layers span and interact with each other across the whole current sheet, global magnetic energy consumption accelerates. The significant contribution of 3D energy modes and their interaction to the reconnection rate enhancement seems to be independent of magnetic diffusivity. On the other hand, the global guide field changes the layout of the 3D reconnection layer and thus determines whether the system is fast-reconnection-preferable.</description><identifier>ISSN: 1070-664X</identifier><identifier>EISSN: 1089-7674</identifier><identifier>DOI: 10.1063/1.5098129</identifier><identifier>CODEN: PHPAEN</identifier><language>eng</language><publisher>Melville: American Institute of Physics</publisher><subject>Acceleration ; Coupling ; Current sheets ; Diffusion layers ; Energy ; Energy consumption ; Inflow ; Outflow ; Plasma physics ; Stability ; Turbulence</subject><ispartof>Physics of plasmas, 2019-07, Vol.26 (7)</ispartof><rights>Author(s)</rights><rights>2019 Author(s). 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We investigate the reason for reconnection acceleration on the characters and development of diffusion regions and sheared 3D energy modes (energy modes that are not parallel to the antiparallel magnetic fields) during the turbulence building stage. We found that multiple reconnection layers emerge due to the growth of 3D sheared tearing instability. Diffusion regions in adjacent reconnection layers form an inflow-outflow coupling that enhances the local reconnection. Further coupling of the existing energy modes breeds new energy modes near the current sheet edge. As reconnection layers span and interact with each other across the whole current sheet, global magnetic energy consumption accelerates. The significant contribution of 3D energy modes and their interaction to the reconnection rate enhancement seems to be independent of magnetic diffusivity. On the other hand, the global guide field changes the layout of the 3D reconnection layer and thus determines whether the system is fast-reconnection-preferable.</description><subject>Acceleration</subject><subject>Coupling</subject><subject>Current sheets</subject><subject>Diffusion layers</subject><subject>Energy</subject><subject>Energy consumption</subject><subject>Inflow</subject><subject>Outflow</subject><subject>Plasma physics</subject><subject>Stability</subject><subject>Turbulence</subject><issn>1070-664X</issn><issn>1089-7674</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNqdkD1rwzAQhkVpoenH0H8g6NSC05NkyfJYkn5BoEuGbsKVTsEhkVzJDuTf1yGB7p3eG57njnsJuWMwZaDEE5tKqDXj9RmZMNB1UamqPD_MFRRKlV-X5CrnNQCUSuoJWcxb74fcxkATrsbItAmOijnFgGm1p9vokDrc4SZ2Www9bQPNXQx9EzAOebRsDAFtP7o35MI3m4y3p7wmy9eX5ey9WHy-fcyeF4UVtegLqVDXHKCxSutSoAfn2Dc6JTmXvNK8rIFX6F3NS5DCa4m84QKsdlpbK67J_XFtl-LPgLk36zikMF40nKtqlJQUI_VwpGyKOSf0pkvttkl7w8AcujLMnLoa2ccjm23bN4dX_gfvYvoDTee8-AW5u3cc</recordid><startdate>201907</startdate><enddate>201907</enddate><creator>Wang, Shuoyang</creator><creator>Yokoyama, Takaaki</creator><general>American Institute of Physics</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0001-5457-4999</orcidid><orcidid>https://orcid.org/0000-0001-8958-6180</orcidid></search><sort><creationdate>201907</creationdate><title>Diffusion regions and 3D energy mode development in spontaneous reconnection</title><author>Wang, Shuoyang ; Yokoyama, Takaaki</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c393t-56e89200ac68843ef0dd1bed65225278249027efd924053f85e2a230c8d88cc3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Acceleration</topic><topic>Coupling</topic><topic>Current sheets</topic><topic>Diffusion layers</topic><topic>Energy</topic><topic>Energy consumption</topic><topic>Inflow</topic><topic>Outflow</topic><topic>Plasma physics</topic><topic>Stability</topic><topic>Turbulence</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wang, Shuoyang</creatorcontrib><creatorcontrib>Yokoyama, Takaaki</creatorcontrib><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Physics of plasmas</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wang, Shuoyang</au><au>Yokoyama, Takaaki</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Diffusion regions and 3D energy mode development in spontaneous reconnection</atitle><jtitle>Physics of plasmas</jtitle><date>2019-07</date><risdate>2019</risdate><volume>26</volume><issue>7</issue><issn>1070-664X</issn><eissn>1089-7674</eissn><coden>PHPAEN</coden><abstract>The understanding of magnetic reconnection in three-dimensions (3D) is far shallower than its counterpart in two-dimensions due to its potential complication, not to mention the evolving of the spontaneously growing turbulence. We investigate the reason for reconnection acceleration on the characters and development of diffusion regions and sheared 3D energy modes (energy modes that are not parallel to the antiparallel magnetic fields) during the turbulence building stage. We found that multiple reconnection layers emerge due to the growth of 3D sheared tearing instability. Diffusion regions in adjacent reconnection layers form an inflow-outflow coupling that enhances the local reconnection. Further coupling of the existing energy modes breeds new energy modes near the current sheet edge. As reconnection layers span and interact with each other across the whole current sheet, global magnetic energy consumption accelerates. The significant contribution of 3D energy modes and their interaction to the reconnection rate enhancement seems to be independent of magnetic diffusivity. 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| ispartof | Physics of plasmas, 2019-07, Vol.26 (7) |
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| language | eng |
| recordid | cdi_crossref_primary_10_1063_1_5098129 |
| source | AIP Journals Complete; Alma/SFX Local Collection |
| subjects | Acceleration Coupling Current sheets Diffusion layers Energy Energy consumption Inflow Outflow Plasma physics Stability Turbulence |
| title | Diffusion regions and 3D energy mode development in spontaneous reconnection |
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