Bakunov M I, Bodrov S B, Maslov A V, Sergeev A M
Department of Radiophysics, University of Nizhny Novgorod, Nizhny Novgorod 603950, Russia.
Phys Rev E Stat Nonlin Soft Matter Phys. 2004;70(1 Pt 2):016401. doi: 10.1103/PhysRevE.70.016401. Epub 2004 Jul 7.
The Cherenkov wakes excited by intense laser drivers in a perpendicularly magnetized plasma are a potential source of high-power terahertz radiation. We present a two-dimensional (2D) theory of the emission of magnetized wakes excited by a short laser pulse. The 2D model reveals the important role of the transverse size of the laser pulse missed in previous simple one-dimensional estimations of the radiation. We derived expressions for the radiated fields and for the angular/frequency distribution of the radiated energy. Beats in the radiation pattern behind the moving pulse are predicted and explained. For the interpretation of existing experimental results, the time dependence of the energy flux parallel and perpendicular to the laser path is examined.
由强激光驱动器在垂直磁化等离子体中激发的切伦科夫尾波是高功率太赫兹辐射的潜在来源。我们提出了一种关于短激光脉冲激发的磁化尾波发射的二维理论。二维模型揭示了在先前简单的一维辐射估计中被忽略的激光脉冲横向尺寸的重要作用。我们推导了辐射场以及辐射能量的角分布/频率分布的表达式。预测并解释了移动脉冲后方辐射图样中的拍频现象。为了解释现有实验结果，研究了平行和垂直于激光路径的能量通量的时间依赖性。
