Emission of Nitrogen Molecules at Tight Focusing of Femtosecond Laser Pulses in Air

被引：1
|
作者：
Ilyin, A. A. [1 ,2 ]
Shmirko, K. A. [1 ,2 ]
Golik, S. S. [1 ,2 ]
Proschenko, D. Yu [2 ,3 ]
机构：
[1] Russian Acad Sci, Inst Automat & Control Proc, Far Eastern Brach, Vladivostok, Russia
[2] Far Eastern Fed Univ, Vladivostok, Russia
[3] Admiral Nevelskoy Marine State Univ, Vladivostok, Russia
来源：
RUSSIAN PHYSICS JOURNAL | 2022年 / 64卷 / 09期
关键词：
filament; emission of nitrogen molecules; femtosecond laser radiation; PLASMA; PHOTODISSOCIATION; FILAMENTS; IONS; TEMPERATURE; RADIATION; DISCHARGE; AFTERGLOW; DYNAMICS; SHIFT;
D O I：
10.1007/s11182-022-02499-3
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A numerical model describing the dynamics of plasma particle density upon filamentation of femtosecond emission in air is presented. The simulation results are in good agreement with the available experimental data. The pumping processes of the N-2 and N-2(+) radiative levels are investigated. The model predicts a tight drop in the electron temperature and density within 1 ns. For the first positive nitrogen system, an excess of the population of the upper emission level over the population of the lower level is observed for 550 ps.
引用
收藏
页码：1629 / 1636
页数：8
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