Characteristics of shock wave from nanosecond laser-produced aluminum plasma in air

Tianhang Liu; Xun Gao; Zehao Liu; Changkai Sun; Zuoqiang Hao; Guangyong Jin; Jingquan Lin

doi:10.1117/12.2010620

16 May 2013 Characteristics of shock wave from nanosecond laser-produced aluminum plasma in air

Tianhang Liu, Xun Gao, Zehao Liu, Changkai Sun, Zuoqiang Hao, Guangyong Jin, Jingquan Lin

Proceedings Volume 8796, 2nd International Symposium on Laser Interaction with Matter (LIMIS 2012); 879611 (2013) https://doi.org/10.1117/12.2010620
Event: 2nd International Symposium on Laser Interaction with Matter (LIMIS 2012), 2012, Xi'an, Shaanxi, China

Abstract

Characteristics of shock wave as well as its evolution of aluminum plasma produced by nanosecond YAG laser is investigated by time-resolved optical shadowgraph images. Experimental results show that shock wave is strongly influenced by the laser parameters and target arrangement. Shock waves from aluminum plasma and air plasma are observed simultaneously by shadowgraphs when the distance from lens to target surface (DLTS) is longer than the lens focal length, and a narrow bright “line” is observed in the region where shock waves from Al plasma and air plasma meet. The longitudinal expansion velocity of shock wave from Al plasma is largely influenced by DLTS and laser intensity as well, and it increases with laser intensity at the early stage of plasma expansion and reach to a maximum of 8.1×10⁴ m/s.

Citation Download Citation

Tianhang Liu, Xun Gao, Zehao Liu, Changkai Sun, Zuoqiang Hao, Guangyong Jin, and Jingquan Lin "Characteristics of shock wave from nanosecond laser-produced aluminum plasma in air", Proc. SPIE 8796, 2nd International Symposium on Laser Interaction with Matter (LIMIS 2012), 879611 (16 May 2013); https://doi.org/10.1117/12.2010620

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