Inefficient magnetic-field amplification in supersonic laser-plasma turbulence

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, D.; Spindloe, C.; Vauzour, B.; Villette, B.; Schekochihin, A. A.; Lamb, D. Q.; Tzeferacos, P.; Gregori, G.; Casner, A.

doi:10.1103/PhysRevLett.127.175002

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Inefficient magnetic-field amplification in supersonic laser-plasma turbulence

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Reville, B.
Brian Reville, Astrophysical Plasma Theory (APT) - Max Planck Research Group, Junior Research Groups, MPI for Nuclear Physics, Max Planck Society;

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Citation

Bott, A. F. A., Chen, L., Boutoux, G., Caillaud, T., Duval, A., Koenig, M., et al. (2021). Inefficient magnetic-field amplification in supersonic laser-plasma turbulence. Physical Review Letters, 127(17): 175002. doi:10.1103/PhysRevLett.127.175002.

Cite as: https://hdl.handle.net/21.11116/0000-0009-E0CF-1

Abstract

We report a laser-plasma experiment that was carried out at the LMJ-PETAL
facility and realized the first magnetized, turbulent, supersonic plasma with a
large magnetic Reynolds number ($\mathrm{Rm} \approx 45$) 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.