Effect of a simple double-confined structure on nanosecond pulse ablative laser propulsion Lei Shi, Shang-Hong Zhao, Xing-Chun Chu, Li-Hua Ma, Ji-Li Wu, Xiao-Liang Li and Yong-Jun Li EPL, 85 5 (2009) 55001 Published online: 09 March 2009 DOI: 10.1209/0295-5075/85/55001