相对论激光脉冲激发的低频哨声波,Physical Review E

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相对论激光脉冲激发的低频哨声波
Physical Review E ( IF 2.2 ) Pub Date : 2020-11-02 , DOI: 10.1103/physreve.102.053204
Huai-Hang Song , Wei-Min Wang , Jia-Qi Wang , Yu-Tong Li , Jie Zhang

多维单元格粒子模拟显示，具有相对涡旋状场拓扑的强次要惠斯勒波可以在高磁化，近临界密度的等离子体中被相对论激光脉冲激发。这种较低频率的啸叫波在激光传播轴的两侧倾斜地传播。从激光到惠斯勒波的能量转换率可能超过

15 ％

。它们的色散关系和场极化特性可以通过线性冷等离子体模型很好地解释。目前的工作提出了一种惠斯勒模式的新的激励机制，这种机制已经扩展到相对论领域，并且还可以应用于磁性辅助的快速点火。

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Low-frequency whistler waves excited by relativistic laser pulses

It is shown by multidimensional particle-in-cell simulations that intense secondary whistler waves with special vortexlike field topology can be excited by a relativistic laser pulse in the highly magnetized, near-critical density plasma. Such whistler waves with lower frequencies obliquely propagate on both sides of the laser propagation axis. The energy conversion rate from laser to whistler waves can exceed

15 %

. Their dispersion relations and field polarization properties can be well explained by the linear cold-plasma model. The present work presents a new excitation mechanism of whistler modes extending to the relativistic regime and could also be applied in magnetically assisted fast ignition.

更新日期：2020-11-02

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