超音速laser -等离子体turbulence中的无效磁场放大
Inefficient magnetic-field amplification in supersonic laser-plasma turbulence
摘要：
我们报告了在LMJ PETAL装置上进行的激光等离子体实验，并在实验室中实现了第一个具有大磁雷诺数（$\mathrm{Rm} \approx 45$）的磁化、湍流、超声速等离子体。最初的种子磁场被放大，但只是适度的，并没有成为动态显着。一个显着的情况下，在尺度小于外部尺度的湍流级联的磁能也被观察到。我们的研究结果支持的概念，适度超音速，低磁普朗特数等离子体湍流是低效的放大磁场。
英文摘要：
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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