1. Inefficient magnetic-field amplification in supersonic laser-plasma turbulence
- Author
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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., and Casner, A.
- Subjects
Physics - Plasma Physics ,Astrophysics - Astrophysics of Galaxies - 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., Comment: 6 pages, 4 figures; supplemental information included (14 pages, 10 figures)
- Published
- 2020
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