论文标题
相对论激光脉冲激发的低频惠斯勒波
Low-frequency whistler waves excited by relativistic laser pulses
论文作者
论文摘要
通过多维粒子中的模拟表明，具有特殊涡流的场拓扑的强烈次级惠斯勒波可以通过相对论激光脉冲在高度磁化，近临界密度等离子体中激发。这种惠斯勒的波浪具有较低的频率，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％。它们的分散关系和场极化特性可以通过线性冷等乘模型很好地解释。目前的工作提出了惠斯勒模式扩展到相对论制度的新激发机制，也可以应用于磁性辅助快速点火。
It is shown by multi-dimensional particle-in-cell simulations that intense secondary whistler waves with special vortex-like 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.
