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)†
a Department of Applied Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China; bDepartment of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, China ; c College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China
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.
Received: 10 April 2007
Revised: 28 November 2007
Accepted manuscript online:
PACS:
42.55.Rz
(Doped-insulator lasers and other solid state lasers)
(Ultraviolet, visible, and infrared radiation effects (including laser radiation))
Fund: 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
Cite this article:
Yang Yan-Nan(杨雁南), Yang Bo(杨波), Zhu Jin-Rong(朱金荣), Shen Zhong-Hua(沈中华), Lu Jian(陆建), and Ni Xiao-Wu(倪晓武) Theoretical analysis and numerical simulation of the impulse delivering from laser-produced plasma to solid target 2008 Chin. Phys. B 17 1318
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