Laboratory evidence of dynamo amplification of magnetic fields in a turbulent plasma

P. Tzeferacos, A. Rigby, A. F. A. Bott, A. R. Bell, R. Bingham, A. Casner, F. Cattaneo, E.M. Churazov, J. Emig, F. Fiuza, C B. Forest, J. Foster, C. Graziani, J. Katz, M. Koenig, C.-K. Li, J. Meinecke, R. Petrasso, H.-S. Park, B.A. Remington & 10 others J.S. Ross, D. Ryu, D. Ryutov, T.G. White, B. Reville, F. Miniati, A.A. Schekochihin, D.Q. Lamb, D.H. Froula, G Gregori

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Magnetic fields are ubiquitous in the Universe. Extragalactic disks, halos and clusters have consistently been shown, via diffuse radio-synchrotron emission and Faraday rotation measurements, to exhibit magnetic field strengths ranging from a few nG to tens of $\mu$G. 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. 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 of the Universe.
LanguageEnglish
Article number591
Number of pages8
JournalNature Communications
Volume9
DOIs
Publication statusPublished - 9 Feb 2018

Fingerprint

Magnetic Fields
Amplification
Magnetic fields
Plasmas
magnetic fields
Seed
seeds
Seeds
flux density
universe
Plasma flow
Faraday effect
Synchrotrons
Fluids
fluids
magnetohydrodynamic flow
Radio
halos
Magnetization
field strength

Keywords

  • energy density
  • turbulent plasmas
  • magnetic fields

Cite this

Tzeferacos, P. ; Rigby, A. ; Bott, A. F. A. ; Bell, A. R. ; Bingham, R. ; Casner, A. ; Cattaneo, F. ; Churazov, E.M. ; Emig, J. ; Fiuza, F. ; B. Forest, C ; Foster, J. ; Graziani, C. ; Katz, J. ; Koenig, M. ; Li, C.-K. ; Meinecke, J. ; Petrasso, R. ; Park, H.-S. ; Remington, B.A. ; Ross, J.S. ; Ryu, D. ; Ryutov, D. ; White, T.G. ; Reville, B. ; Miniati, F. ; Schekochihin, A.A. ; Lamb, D.Q. ; Froula, D.H. ; Gregori, G. / Laboratory evidence of dynamo amplification of magnetic fields in a turbulent plasma. In: Nature Communications. 2018 ; Vol. 9.
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abstract = "Magnetic fields are ubiquitous in the Universe. Extragalactic disks, halos and clusters have consistently been shown, via diffuse radio-synchrotron emission and Faraday rotation measurements, to exhibit magnetic field strengths ranging from a few nG to tens of $\mu$G. 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. 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 of the Universe.",
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Tzeferacos, P, Rigby, A, Bott, AFA, Bell, AR, Bingham, R, Casner, A, Cattaneo, F, Churazov, EM, Emig, J, Fiuza, F, B. Forest, C, Foster, J, Graziani, C, Katz, J, Koenig, M, Li, C-K, Meinecke, J, Petrasso, R, Park, H-S, Remington, BA, Ross, JS, Ryu, D, Ryutov, D, White, TG, Reville, B, Miniati, F, Schekochihin, AA, Lamb, DQ, Froula, DH & Gregori, G 2018, 'Laboratory evidence of dynamo amplification of magnetic fields in a turbulent plasma' Nature Communications, vol. 9, 591. https://doi.org/10.1038/s41467-018-02953-2

Laboratory evidence of dynamo amplification of magnetic fields in a turbulent plasma. / Tzeferacos, P.; Rigby, A.; Bott, A. F. A.; Bell, A. R.; Bingham, R.; Casner, A.; Cattaneo, F.; Churazov, E.M.; Emig, J.; Fiuza, F.; B. Forest, C; Foster, J.; Graziani, C.; Katz, J.; Koenig, M.; Li, C.-K.; Meinecke, J.; Petrasso, R.; Park, H.-S.; Remington, B.A.; Ross, J.S.; Ryu, D.; Ryutov, D.; White, T.G.; Reville, B.; Miniati, F.; Schekochihin, A.A.; Lamb, D.Q.; Froula, D.H.; Gregori, G.

In: Nature Communications, Vol. 9, 591, 09.02.2018.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Laboratory evidence of dynamo amplification of magnetic fields in a turbulent plasma

AU - Tzeferacos, P.

AU - Rigby, A.

AU - Bott, A. F. A.

AU - Bell, A. R.

AU - Bingham, R.

AU - Casner, A.

AU - Cattaneo, F.

AU - Churazov, E.M.

AU - Emig, J.

AU - Fiuza, F.

AU - B. Forest, C

AU - Foster, J.

AU - Graziani, C.

AU - Katz, J.

AU - Koenig, M.

AU - Li, C.-K.

AU - Meinecke, J.

AU - Petrasso, R.

AU - Park, H.-S.

AU - Remington, B.A.

AU - Ross, J.S.

AU - Ryu, D.

AU - Ryutov, D.

AU - White, T.G.

AU - Reville, B.

AU - Miniati, F.

AU - Schekochihin, A.A.

AU - Lamb, D.Q.

AU - Froula, D.H.

AU - Gregori, G

PY - 2018/2/9

Y1 - 2018/2/9

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AB - Magnetic fields are ubiquitous in the Universe. Extragalactic disks, halos and clusters have consistently been shown, via diffuse radio-synchrotron emission and Faraday rotation measurements, to exhibit magnetic field strengths ranging from a few nG to tens of $\mu$G. 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. 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 of the Universe.

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KW - turbulent plasmas

KW - magnetic fields

U2 - 10.1038/s41467-018-02953-2

DO - 10.1038/s41467-018-02953-2

M3 - Article

VL - 9

JO - Nature Communications

T2 - Nature Communications

JF - Nature Communications

SN - 2041-1723

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ER -