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Ryu, Dongsu
Astrophysics Lab
Research Interests
  • Shock waves and turbulence in clusters of galaxies
  • Origin and evolution of magnetic fields and cosmic rays in the universe
  • Plasma astrophysical phenomena in the large-scale structure of the universe

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Inefficient Magnetic-Field Amplification in Supersonic Laser-Plasma Turbulence

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Title
Inefficient Magnetic-Field Amplification in Supersonic Laser-Plasma Turbulence
Author
Bott, A. F. A.Chen, L.Boutoux, G.Caillaud, T.Duval, A.Koenig, M.Khiar, B.Lantuéjoul, I.Le-Deroff, L.Reville, B.Rosch, R.Ryu, DongsuSpindloe, C.Vauzour, B.Villette, B.Schekochihin, A. A.Lamb, D. Q.Tzeferacos, P.Gregori, G.Casner, A.
Issue Date
2021-10
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v.127, no.17, pp.175002
Abstract
We report a laser-plasma experiment that was carried out at the LMJ-PETAL facility and realized the first magnetized, turbulent, supersonic (Maturb 2.5) plasma with a large magnetic Reynolds number (Rm 45) in the laboratory. Initial seed magnetic fields were amplified, but only moderately so, and did not become dynamically significant. A notable absence of magnetic energy at scales smaller than the outer scale of the turbulent cascade was also observed. Our results support the notion that moderately supersonic, low-magnetic-Prandtl-number plasma turbulence is inefficient at amplifying magnetic fields compared to its subsonic, incompressible counterpart.
URI
https://scholarworks.unist.ac.kr/handle/201301/54818
URL
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.127.175002
DOI
10.1103/physrevlett.127.175002
ISSN
0031-9007
Appears in Collections:
PHY_Journal Papers
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