Evolution of shock waves formed by laser-induced breakdown in air

doi:10.1088/1009-1963/16/12/028

中国物理B ›› 2007, Vol. 16 ›› Issue (12): 3728-3731.doi: 10.1088/1009-1963/16/12/028

Evolution of shock waves formed by laser-induced breakdown in air

刘峰¹, 张翼², 李玉同², 刘峰², 仲佳勇², 林晓暄², 鲁欣², 张杰², 郑志远³

(1)Beijing National Laboratory for Condensed Matter Physics, Institute of Physics,Chinese Academy of Sciences, Beijing 100080, China; (2)Beijing National Laboratory for Condensed Matter Physics, Institute of Physics,Chinese Academy of Sciences, Beijing 100080, China; (3)Beijing National Laboratory for Condensed Matter Physics, Institute of Physics,Chinese Academy of Sciences, Beijing 100080, China;School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China

出版日期:2007-12-20 发布日期:2007-12-20
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos 10510490, 10675164, 10634020, 60478047 and 60621063) and National Basic Research Program of China (973 Program) (Grant No 2007CB815102).

Evolution of shock waves formed by laser-induced breakdown in air

Zhang Yi(张翼)^a), Li Yu-Tong(李玉同)^a), Zheng Zhi-Yuan(郑志远)^a)b), Liu Feng(刘峰)^a), Zhong Jia-Yong(仲佳勇)^a), Lin Xiao Xuan(林晓暄)^a), Liu Feng(刘峰)^a), Lu Xin(鲁欣)^a), and Zhang Jie(张杰)^a)^†

^a Beijing National Laboratory for Condensed Matter Physics, Institute of Physics,Chinese Academy of Sciences, Beijing 100080, China; ^b School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China

Online:2007-12-20 Published:2007-12-20
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos 10510490, 10675164, 10634020, 60478047 and 60621063) and National Basic Research Program of China (973 Program) (Grant No 2007CB815102).

摘要/Abstract

摘要： The evolution of shock waves produced by 7 ns laser pulses in air is investigated by time-resolved shadowgraph. A nodular structure of the shock wave is observed. It is found that the origin of the structure is the multi-longitudinal-microfocus caused by the astigmatism of the laser beam. The spherical shock waves formed by each microfocus expand gradually and collide with each other, resulting in the nodular structure of the shock wave.

关键词: shock wave, nodular structure, astigmatism

Abstract: The evolution of shock waves produced by 7 ns laser pulses in air is investigated by time-resolved shadowgraph. A nodular structure of the shock wave is observed. It is found that the origin of the structure is the multi-longitudinal-microfocus caused by the astigmatism of the laser beam. The spherical shock waves formed by each microfocus expand gradually and collide with each other, resulting in the nodular structure of the shock wave.

Key words: shock wave, nodular structure, astigmatism

中图分类号: (Shock waves and discontinuities)

52.35.Tc

52.38.-r (Laser-plasma interactions)

张翼, 李玉同, 郑志远, 刘峰, 仲佳勇, 林晓暄, 刘峰, 鲁欣, 张杰. Evolution of shock waves formed by laser-induced breakdown in air[J]. 中国物理B, 2007, 16(12): 3728-3731.

Zhang Yi(张翼), Li Yu-Tong(李玉同), Zheng Zhi-Yuan(郑志远), Liu Feng(刘峰), Zhong Jia-Yong(仲佳勇), Lin Xiao Xuan(林晓暄), Liu Feng(刘峰), Lu Xin(鲁欣), and Zhang Jie(张杰). Evolution of shock waves formed by laser-induced breakdown in air[J]. Chinese Physics, 2007, 16(12): 3728-3731.

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Evolution of shock waves formed by laser-induced breakdown in air

Evolution of shock waves formed by laser-induced breakdown in air

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