The two-fluid dynamics and energetics of the asymmetric magnetic reconnection in laboratory and space plasmas
Abstract
Magnetic reconnection is a fundamental process in magnetized plasma where magnetic energy is converted to plasma energy. Despite huge differences in the physical size of the reconnection layer, remarkably similar characteristics are observed in both laboratory and magnetosphere plasmas. Here we present the comparative study of the dynamics and physical mechanisms governing the energy conversion in the laboratory and space plasma in the context of two-fluid physics, aided by numerical simulations. In strongly asymmetric reconnection layers with negligible guide field, the energy deposition to electrons is found to primarily occur in the electron diffusion region where electrons are demagnetized and diffuse. A large potential well is observed within the reconnection plane and ions are accelerated by the electric field toward the exhaust region. In conclusion, the present comparative study identifies the robust two-fluid mechanism operating in systems over six orders of magnitude in spatial scales and over a wide range of collisionality.
- Authors:
-
- Princeton Univ., Princeton, NJ (United States). Princeton Plasma Physics Lab.
- NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Southwest Research Institute, San Antonio, TX (United States)
- Univ. of Bergen, Bergen (Norway)
- Univ. of New Hampshire, Durham, NH (United States)
- Publication Date:
- Research Org.:
- Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1489227
- Alternate Identifier(s):
- OSTI ID: 1489968
- Report Number(s):
- LA-UR-18-31065
Journal ID: ISSN 2041-1723; PII: 7680
- Grant/Contract Number:
- AC02-09CH11466; 89233218CNA000001
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Yamada, M., Chen, L. -J., Yoo, J., Wang, S., Fox, W., Jara-Almonte, J., Ji, H., Daughton, W., Le, A., Burch, J., Giles, B., Hesse, M., Moore, T., and Torbert, R. The two-fluid dynamics and energetics of the asymmetric magnetic reconnection in laboratory and space plasmas. United States: N. p., 2018.
Web. doi:10.1038/s41467-018-07680-2.
Yamada, M., Chen, L. -J., Yoo, J., Wang, S., Fox, W., Jara-Almonte, J., Ji, H., Daughton, W., Le, A., Burch, J., Giles, B., Hesse, M., Moore, T., & Torbert, R. The two-fluid dynamics and energetics of the asymmetric magnetic reconnection in laboratory and space plasmas. United States. https://doi.org/10.1038/s41467-018-07680-2
Yamada, M., Chen, L. -J., Yoo, J., Wang, S., Fox, W., Jara-Almonte, J., Ji, H., Daughton, W., Le, A., Burch, J., Giles, B., Hesse, M., Moore, T., and Torbert, R. Thu .
"The two-fluid dynamics and energetics of the asymmetric magnetic reconnection in laboratory and space plasmas". United States. https://doi.org/10.1038/s41467-018-07680-2. https://www.osti.gov/servlets/purl/1489227.
@article{osti_1489227,
title = {The two-fluid dynamics and energetics of the asymmetric magnetic reconnection in laboratory and space plasmas},
author = {Yamada, M. and Chen, L. -J. and Yoo, J. and Wang, S. and Fox, W. and Jara-Almonte, J. and Ji, H. and Daughton, W. and Le, A. and Burch, J. and Giles, B. and Hesse, M. and Moore, T. and Torbert, R.},
abstractNote = {Magnetic reconnection is a fundamental process in magnetized plasma where magnetic energy is converted to plasma energy. Despite huge differences in the physical size of the reconnection layer, remarkably similar characteristics are observed in both laboratory and magnetosphere plasmas. Here we present the comparative study of the dynamics and physical mechanisms governing the energy conversion in the laboratory and space plasma in the context of two-fluid physics, aided by numerical simulations. In strongly asymmetric reconnection layers with negligible guide field, the energy deposition to electrons is found to primarily occur in the electron diffusion region where electrons are demagnetized and diffuse. A large potential well is observed within the reconnection plane and ions are accelerated by the electric field toward the exhaust region. In conclusion, the present comparative study identifies the robust two-fluid mechanism operating in systems over six orders of magnitude in spatial scales and over a wide range of collisionality.},
doi = {10.1038/s41467-018-07680-2},
journal = {Nature Communications},
number = 1,
volume = 9,
place = {United States},
year = {Thu Dec 06 00:00:00 EST 2018},
month = {Thu Dec 06 00:00:00 EST 2018}
}
Web of Science
Figures / Tables:
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