skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Energy Conversion by Parallel Electric Fields During Guide Field Reconnection in Scaled Laboratory and Space Experiments

Abstract

Here, we present direct and scaled comparisons between laboratory and in situ space observations of magnetic reconnection with a guide field, comparing results from the Magnetospheric Multiscale Mission and the Magnetic Reconnection eXperiment (MRX). While Magnetospheric Multiscale Mission observations obtain high–resolution and fully kinetic data, MRX observations fully cover the 2–D reconnection plane near the current sheet, removing uncertainties in situating the measurements compared to the reconnection region. Through scaling transformations, we show a quantitative agreement in magnetic field and current density profiles, which agree within a factor of 2 from each other. The introduction of the guide field causes the energy conversion J·E in the current sheet to be dominated by J || E || in both cases. However, parallel electric fields reported by recent spacecraft crossings are significantly (5–10 times) larger than values obtained on MRX, highlighting an important issue for understanding energy conversion by reconnection.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [3];  [4]; ORCiD logo [3]; ORCiD logo [1];  [3]; ORCiD logo [2]; ORCiD logo [5]; ORCiD logo [5]
  1. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Princeton Univ., Princeton, NJ (United States)
  2. Univ. of Colorado, Boulder, CO (United States)
  3. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  4. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); National Institute of Natural Sciences, Toki (Japan)
  5. Univ. of California, Berkeley, CA (United States)
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1489242
Alternate Identifier(s):
OSTI ID: 1484954
Grant/Contract Number:  
NNH15AB29I; NNH14AX631; AC02-04CH11466; AC0204CH11466
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Geophysical Research Letters
Additional Journal Information:
Journal Volume: 45; Journal Issue: 23; Journal ID: ISSN 0094-8276
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; magnetic reconnection; magnetosphere; energy conversion; guide field; experiment

Citation Formats

Fox, W., Wilder, F. D., Eriksson, S., Jara‐Almonte, J., Pucci, F., Yoo, J., Ji, H., Yamada, M., Ergun, R. E., Oieroset, M., and Phan, T. D.. Energy Conversion by Parallel Electric Fields During Guide Field Reconnection in Scaled Laboratory and Space Experiments. United States: N. p., 2018. Web. doi:10.1029/2018GL079883.
Fox, W., Wilder, F. D., Eriksson, S., Jara‐Almonte, J., Pucci, F., Yoo, J., Ji, H., Yamada, M., Ergun, R. E., Oieroset, M., & Phan, T. D.. Energy Conversion by Parallel Electric Fields During Guide Field Reconnection in Scaled Laboratory and Space Experiments. United States. doi:10.1029/2018GL079883.
Fox, W., Wilder, F. D., Eriksson, S., Jara‐Almonte, J., Pucci, F., Yoo, J., Ji, H., Yamada, M., Ergun, R. E., Oieroset, M., and Phan, T. D.. Thu . "Energy Conversion by Parallel Electric Fields During Guide Field Reconnection in Scaled Laboratory and Space Experiments". United States. doi:10.1029/2018GL079883.
@article{osti_1489242,
title = {Energy Conversion by Parallel Electric Fields During Guide Field Reconnection in Scaled Laboratory and Space Experiments},
author = {Fox, W. and Wilder, F. D. and Eriksson, S. and Jara‐Almonte, J. and Pucci, F. and Yoo, J. and Ji, H. and Yamada, M. and Ergun, R. E. and Oieroset, M. and Phan, T. D.},
abstractNote = {Here, we present direct and scaled comparisons between laboratory and in situ space observations of magnetic reconnection with a guide field, comparing results from the Magnetospheric Multiscale Mission and the Magnetic Reconnection eXperiment (MRX). While Magnetospheric Multiscale Mission observations obtain high–resolution and fully kinetic data, MRX observations fully cover the 2–D reconnection plane near the current sheet, removing uncertainties in situating the measurements compared to the reconnection region. Through scaling transformations, we show a quantitative agreement in magnetic field and current density profiles, which agree within a factor of 2 from each other. The introduction of the guide field causes the energy conversion J·E in the current sheet to be dominated by J||E|| in both cases. However, parallel electric fields reported by recent spacecraft crossings are significantly (5–10 times) larger than values obtained on MRX, highlighting an important issue for understanding energy conversion by reconnection.},
doi = {10.1029/2018GL079883},
journal = {Geophysical Research Letters},
issn = {0094-8276},
number = 23,
volume = 45,
place = {United States},
year = {2018},
month = {11}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on November 15, 2019
Publisher's Version of Record

Save / Share: