Inefficient Magnetic-Field Amplification in Supersonic Laser-Plasma Turbulence
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- 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, Dongsu; Spindloe, C.; Vauzour, B.; Villette, B.; Schekochihin, A. A.; Lamb, D. Q.; Tzeferacos, P.; Gregori, G.; Casner, A.
- Issue Date
- AMER PHYSICAL SOC
- PHYSICAL REVIEW LETTERS, v.127, no.17, pp.175002
- 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.
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