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Title: Developed turbulence and nonlinear amplification of magnetic fields in laboratory and astrophysical plasmas

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America
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  1. Univ. of Oxford (United Kingdom)
  2. Univ. of Chicago, IL (United States)
  3. Science and Technology Facilities Council (STFC), Oxford (United Kingdom). Rutherford Appleton Lab. (RAL); Univ. of Strathclyde, Glasgow (United Kingdom)
  4. Science and Technology Facilities Council (STFC), Oxford (United Kingdom). Rutherford Appleton Lab. (RAL)
  5. Max Planck Society, Garching (Germany). Max Planck Inst. for Astrophysics; Space Research Inst., Moscow (Russia)
  6. Univ. of York (United Kingdom)
  7. Univ. of Michigan, Ann Arbor, MI (United States)
  8. Univ. Paris Ecole Polytechnique, Palaiseau (France)
  9. Osaka Univ. (Japan); National Central Univ., Taoyuan (Taiwan)
  10. Univ. of California, Santa Cruz, CA (United States)
  11. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  12. Univ. Paris Ecole Polytechnique, Palaiseau (France); Helmholtz-Zentrum Dresden-Rossendorf, (Germany)
  13. Queen's Univ., Belfast, Northern Ireland (United Kingdom)
  14. Osaka Univ. (Japan)
  15. ETH Zurich (Switzerland)
  16. Univ. of Oxford (United Kingdom); Univ. of Chicago, IL (United States)

The visible matter in the universe is turbulent and magnetized. Turbulence in galaxy clusters is produced by mergers and by jets of the central galaxies and believed responsible for the amplification of magnetic fields. We report on experiments looking at the collision of two laser-produced plasma clouds, mimicking, in the laboratory, a cluster merger event. By measuring the spectrum of the density fluctuations, we infer developed, Kolmogorov-like turbulence. From spectral line broadening, we estimate a level of turbulence consistent with turbulent heating balancing radiative cooling, as it likely does in galaxy clusters. We show that the magnetic field is amplified by turbulent motions, reaching a nonlinear regime that is a precursor to turbulent dynamo. Thus, our experiment provides a promising platform for understanding the structure of turbulence and the amplification of magnetic fields in the universe.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1414370
Report Number(s):
LLNL-JRNL-742436
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Vol. 112, Issue 27; ISSN 0027-8424
Publisher:
National Academy of Sciences, Washington, DC (United States)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 50 works
Citation information provided by
Web of Science

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Cited By (13)

Laboratory evidence of dynamo amplification of magnetic fields in a turbulent plasma journal February 2018
Laboratory evidence of dynamo amplification of magnetic fields in a turbulent plasma text January 2018
Analytical estimates of proton acceleration in laser-produced turbulent plasmas journal November 2018
The dividends of investing in computational software design: A case study journal November 2017
Analytical Estimates of Proton Acceleration in Laser-produced Turbulent Plasmas image January 2018
Numerical simulation of turbulence and terahertz magnetosonic waves generation in collisionless plasmas journal January 2018
Identifying the linear phase of the relativistic Kelvin-Helmholtz instability and measuring its growth rate via radiation journal July 2017
Supersonic plasma turbulence in the laboratory journal April 2019
Analytical Estimates of Proton Acceleration in Laser-produced Turbulent Plasmas image January 2018
Magnetic turbulence in a table-top laser-plasma relevant to astrophysical scenarios journal June 2017
Laboratory evidence of dynamo amplification of magnetic fields in a turbulent plasma text January 2017
Magnetic Field Amplification in Galaxy Clusters and Its Simulation journal November 2018
Evidence of a "current-mediated" turbulent regime in space and astrophysical plasmas preprint January 2020