Inefficient magnetic-field amplification in supersonic laser-plasma turbulence

Inefficient magnetic-field amplification in supersonic laser-plasma turbulence

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,...

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Príomhchruthaitheoirí: Bott, AFA, 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, AA, Lamb, DQ, Tzeferacos, P, Gregori, G, Casner, A
Formáid: Journal article
Teanga:English
Foilsithe / Cruthaithe: American Physical Society 2021
Cur síos
Achoimre: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.

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