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用数值模拟方法研究激光在等离子体中成丝的发展过程及其特征参数对成丝的影响。模拟结果清晰地给出柱状成丝不稳定性的产生及发展。计算结果表明 :入射激光强度、入射激光波长及等离子体背景密度是影响会聚强度的重要因素。该结果与国外报道的理论和实验研究吻合 ,可为研究抑制成丝提供参考。
The numerical simulation is used to study the development of laser in plasma and the influence of its characteristic parameters on the filament formation. The simulation results clearly show the generation and development of columnar filament instability. The calculated results show that the incident laser intensity, the incident laser wavelength and the plasma background density are the important factors affecting the convergence intensity. The results coincide with the theoretical and experimental studies reported in foreign countries, which can provide reference for the study of inhibiting filaments.