中国物理B ›› 2008, Vol. 17 ›› Issue (4): 1318-1325.doi: 10.1088/1674-1056/17/4/028

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Theoretical analysis and numerical simulation of the impulse delivering from laser-produced plasma to solid target

杨雁南1, 杨波2, 沈中华2, 陆建2, 倪晓武2, 朱金荣3   

  1. (1)Department of Applied Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, China ; (2)Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, China; (3)Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, China;College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China
  • 收稿日期:2007-04-10 修回日期:2007-11-28 出版日期:2008-04-20 发布日期:2008-04-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 60578015), the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No 20050288025) and the Foundation of the Ministry of Education of China

Theoretical analysis and numerical simulation of the impulse delivering from laser-produced plasma to solid target

Yang Yan-Nan(杨雁南)a)b), Yang Bo(杨波)b), Zhu Jin-Rong(朱金荣)b)c), Shen Zhong-Hua(沈中华)b), Lu Jian(陆建)b), and Ni Xiao-Wu(倪晓武)b)†   

  1. a Department of Applied Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China; b Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, China ; c College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China
  • Received:2007-04-10 Revised:2007-11-28 Online:2008-04-20 Published:2008-04-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 60578015), the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No 20050288025) and the Foundation of the Ministry of Education of China

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摘要： A plasma is produced in air by using a high-intensity Q-switch Nd:YAG pulsed laser to irradiate a solid target, and the impulses delivering from the plasma to the target are measured at different laser power densities. Analysing the formation process of laser plasma and the laser supported detonation wave (LSDW) and using fluid mechanics theory and Pirri's methods, an approximately theoretical solution of the impulse delivering from the plasma to the target under our experimental condition is found. Furthermore, according to the formation time of plasma and the variation of pressure in plasma in a non-equilibrium state, a physical model of the interaction between the pulse laser and the solid target is developed. The plasma evolutions with time during and after the laser pulse irradiating the target are simulated numerically by using a three-dimensional difference scheme. And the numerical solutions of the impulse delivering from the plasma to the target are obtained. A comparison among the theoretical, numerical and experimental results and their analyses are performed. The experimental results are explained reasonably. The consistency between numerical results and experimental results implies that the numerical calculation model used in this paper can well describe the mechanical action of the laser on the target.

关键词: plasma production and heating by laser beams, solid-plasma interactions, impulse, fluid dynamics simulation

Abstract: A plasma is produced in air by using a high-intensity Q-switch Nd:YAG pulsed laser to irradiate a solid target, and the impulses delivering from the plasma to the target are measured at different laser power densities. Analysing the formation process of laser plasma and the laser supported detonation wave (LSDW) and using fluid mechanics theory and Pirri's methods, an approximately theoretical solution of the impulse delivering from the plasma to the target under our experimental condition is found. Furthermore, according to the formation time of plasma and the variation of pressure in plasma in a non-equilibrium state, a physical model of the interaction between the pulse laser and the solid target is developed. The plasma evolutions with time during and after the laser pulse irradiating the target are simulated numerically by using a three-dimensional difference scheme. And the numerical solutions of the impulse delivering from the plasma to the target are obtained. A comparison among the theoretical, numerical and experimental results and their analyses are performed. The experimental results are explained reasonably. The consistency between numerical results and experimental results implies that the numerical calculation model used in this paper can well describe the mechanical action of the laser on the target.

Key words: plasma production and heating by laser beams, solid-plasma interactions, impulse, fluid dynamics simulation

中图分类号:  (Doped-insulator lasers and other solid state lasers)

  • 42.55.Rz
52.40.Hf (Plasma-material interactions; boundary layer effects) 52.50.Jm (Plasma production and heating by laser beams (laser-foil, laser-cluster, etc.)) 61.80.Ba (Ultraviolet, visible, and infrared radiation effects (including laser radiation))