Mechanism of laser-induced plasma shock wave evolution in air
Zhao Rui(赵瑞)a), Liang Zhong-Cheng(梁忠诚)a), Han Bing(韩冰)b), Zhang Hong-Chao(张宏超)b), Xu Rong-Qing(徐荣青)c), Lu Jian(陆建)b), and Ni Xiao-Wu(倪晓武)b)†
a Center for Optofluidic Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China; bDepartment of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, China; cCollege of Optoelectronic Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
Abstract A theoretical model is proposed to describe the mechanism of laser-induced plasma shock wave evolution in air. To verify the validity of the theoretical model, an optical beam deflection technique is employed to track the plasma shock wave evolution process. The theoretical model and the experimental signals are found to be in good agreement with each other. It is shown that the laser-induced plasma shock wave undergoes formation, increase and decay processes; the increase and the decay processes of the laser-induced plasma shock wave result from the overlapping of the compression wave and the rarefaction wave, respectively. In addition, the laser-induced plasma shock wave speed and pressure distributions, both a function of distance, are presented.
Received: 25 February 2008
Revised: 03 October 2008
Accepted manuscript online:
Fund: Project supported by the National
Natural Science Foundation of China (Grant Nos 60578015, 60778007
and 60878037), the Natural Science Foundation of the Jiangsu Higher
Education Institutions of China (Grant No 05KTB510028), the
Scientific Research Startin
Cite this article:
Zhao Rui(赵瑞), Liang Zhong-Cheng(梁忠诚), Han Bing(韩冰), Zhang Hong-Chao(张宏超), Xu Rong-Qing(徐荣青), Lu Jian(陆建), and Ni Xiao-Wu(倪晓武) Mechanism of laser-induced plasma shock wave evolution in air 2009 Chin. Phys. B 18 1877
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