Secondary shock wave in laser-material interaction

作者：Gacek Sobieslaw^*; Wang Xinwei

来源：Journal of Applied Physics, 2008, 104(12): 126101.

DOI：10.1063/1.3039212

• argon
• laser ablation
• molecular dynamics method
• shock wave effects

In this work, the effects of shock driven process of the laser-ablated argon plume in a background gas environment are explored via molecular dynamics simulations. The primary shock wave propagation and its influence on the backward motion of the target material are delineated. It is observed that the strong pressure gradient inside the main shock wave overcomes the forward momentum of the plume and some compressed gas, leading to backward movement and redeposition on the target surface. Reflection of the backward moving gas on the target surface results in the secondary shock wave. Detailed investigation of the secondary shock wave phenomenon is provided, which gives, for the first time, an insight into formation and evolution of the internal gaseous shock at the atomistic level.

• 出版日期2008-12-15