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Wave-particle energy exchange directly observed in a kinetic Alfvén-branch wave

Gershman, Daniel J. and F-Viñas, Adolfo and Dorelli, John C. and Boardsen, Scott A. and Avanov, Levon A. and Bellan, Paul M. and Schwartz, Steven J. and Lavraud, Benoit and Coffey, Victoria N. and Chandler, Michael O. and Saito, Yoshifumi and Paterson, William R. and Fuselier, Stephen A. and Ergun, Robert E. and Strangeway, Robert J. and Russell, Christopher T. and Giles, Barbara L. and Pollock, Craig J. and Torbert, Roy B. and Burch, James L. (2017) Wave-particle energy exchange directly observed in a kinetic Alfvén-branch wave. Nature Communications, 8 . Art. No. 14719. ISSN 2041-1723. PMCID PMC5380972. https://resolver.caltech.edu/CaltechAUTHORS:20170403-142508693

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Abstract

Alfvén waves are fundamental plasma wave modes that permeate the universe. At small kinetic scales, they provide a critical mechanism for the transfer of energy between electromagnetic fields and charged particles. These waves are important not only in planetary magnetospheres, heliospheres and astrophysical systems but also in laboratory plasma experiments and fusion reactors. Through measurement of charged particles and electromagnetic fields with NASA’s Magnetospheric Multiscale (MMS) mission, we utilize Earth’s magnetosphere as a plasma physics laboratory. Here we confirm the conservative energy exchange between the electromagnetic field fluctuations and the charged particles that comprise an undamped kinetic Alfvén wave. Electrons confined between adjacent wave peaks may have contributed to saturation of damping effects via nonlinear particle trapping. The investigation of these detailed wave dynamics has been unexplored territory in experimental plasma physics and is only recently enabled by high-resolution MMS observations.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1038/ncomms14719DOIArticle
http://www.nature.com/articles/ncomms14719PublisherArticle
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5380972/PubMed CentralArticle
ORCID:
AuthorORCID
Bellan, Paul M.0000-0002-0886-8782
Russell, Christopher T.0000-0003-1639-8298
Additional Information:© 2017 The Author(s). This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. Received: 01 September 2016; Accepted: 20 January 2017; Published online: 31 March 2017. We thank the members of the FPI ground operations and science team for their feedback and support and Lynn Wilson for his insights about wave properties. This research was supported by the NASA Magnetospheric Multiscale Mission in association with NASA contract NNG04EB99C and by NSF award 1059519, AFOSR award FA9550-11-1-0184 and DOE awards DE-FG02-04ER54755 and DE-SC0010471. S.J.S. is grateful to the Leverhulme Trust for its award of a Research Fellowship. Author Contributions: D.J.G. conducted the majority of the scientific and data analysis and was responsible for initial preparation of the manuscript text. A.F-V. assisted with the interpretation of wave signatures, plasma wave modeling and with the preparation of the manuscript text. J.C.D., S.A.B. and L.A.A. assisted with the interpretation of plasma wave signatures, detailed analysis of plasma data and with the preparation of the manuscript text. P.M.B. assisted with the implementation of the wavevector determination method and with the preparation of the manuscript text. S.J.S. assisted with the Liouville mapping of electron data and preparation of the manuscript text. B.L., V.N.C., M.O.C., Y.S. and W.R.P. provided and ensured quality of high-resolution plasma data and assisted with the preparation of the manuscript text. S.A.F. provided and ensured the quality of the plasma composition data. R.E.E. and R.B.T. provided and ensured the quality of high-resolution electric field data and assisted with the preparation of the manuscript text. R.J.S. and C.T.R. provided and ensured the quality of high-resolution fluxgate magnetometer data. B.L.G., C.J.P. and J.L.B. provided institutional and mission-level support of the analysis and ensured overall quality of MMS and FPI data. The authors declare no competing financial interests.
Funders:
Funding AgencyGrant Number
NASANNG04EB99C
NSF1059519
Air Force Office of Scientific Research (AFOSR)FA9550-11-1-0184
Department of Energy (DOE)DE-FG02-04ER54755
Department of Energy (DOE)DE-SC0010471
Leverhulme TrustUNSPECIFIED
PubMed Central ID:PMC5380972
Record Number:CaltechAUTHORS:20170403-142508693
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170403-142508693
Official Citation:Gershman, D. J. et al. Wave-particle energy exchange directly observed in a kinetic Alfvén-branch wave. Nat. Commun. 8, 14719 doi: 10.1038/ncomms14719 (2017)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:75650
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:09 Mar 2020 11:21
Last Modified:09 Mar 2020 13:19

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