Journal article
Laboratory evidence of dynamo amplification of magnetic fields in a turbulent plasma
- Abstract:
- Magnetic fields are ubiquitous in the Universe. Diffuse radiosynchrotron emission observations and Faraday rotation measurements have revealed magnetic field strengths ranging from a few nG and tens of µG in extragalactic disks, halos and clusters [1], up to hundreds of TG in magnetars, as inferred from their spin-down [2]. The energy density of these fields is typically comparable to the energy density of the fluid motions of the plasma in which they are embedded, making magnetic fields essential players in the dynamics of the luminous matter. The standard theoretical model for the origin of these strong magnetic fields is through the amplification of tiny seed fields via turbulent dynamo to the level consistent with current observations [3–7]. Here we demonstrate, using laser-produced colliding plasma flows, that turbulence is indeed capable of rapidly amplifying seed fields to near equipartition with the turbulent fluid motions. These results support the notion that turbulent dynamo is a viable mechanism responsible for the observed present-day magnetization.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 1.8MB, Terms of use)
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- Publisher copy:
- 10.1038/s41467-018-02953-2
Authors
+ US Department of Energy
More from this funder
- Grant:
- B591485toLawrenceLivermoreNationalLaboratory, FieldWorkProposalNo.57789toArgonneNationalLaboratory,
- grantsno.DE-NA0002724
- DE-SC0016566to theUniversityofChicago
- Publisher:
- Springer Nature
- Journal:
- Nature Communications More from this journal
- Volume:
- 9
- Article number:
- 591
- Publication date:
- 2018-02-09
- Acceptance date:
- 2018-01-09
- DOI:
- ISSN:
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2041-1723
- Keywords:
- Pubs id:
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pubs:822571
- UUID:
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uuid:cf62958c-09c4-4b6d-b5f1-0abe09c40254
- Local pid:
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pubs:822571
- Source identifiers:
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822571
- Deposit date:
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2018-02-02
Terms of use
- Copyright holder:
- Tzeferacos et al
- Copyright date:
- 2018
- Notes:
- This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
- Licence:
- CC Attribution (CC BY)
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