Propulsion of targets with different confinement geometries in water by Nd: YAG laser at 1064nm

Jun Chen; Bei-Bei Li; Hong-Chao Zhang; Bing Han; Zhong-Hua Shen; Xiao-Wu Ni

doi:10.1117/12.2001493

22 February 2013 Propulsion of targets with different confinement geometries in water by Nd: YAG laser at 1064nm

Jun Chen, Bei-Bei Li, Hong-Chao Zhang, Bing Han, Zhong-Hua Shen, Xiao-Wu Ni

Proceedings Volume 8603, High-Power Laser Materials Processing: Lasers, Beam Delivery, Diagnostics, and Applications II; 86030W (2013) https://doi.org/10.1117/12.2001493
Event: SPIE LASE, 2013, San Francisco, California, United States

Abstract

Laser propulsion in air or vacuum has been developed as a thruster technology for the attitude control of micro class satellites. Laser propulsion in water can be used as a technology for propelling underwater platform or controlling microfluid device. Laser propulsion effects in water are much better in air due to the force from laser-induced bubble in water. The target geometries will influence the propulsion effects in air. In order to investigate the influence of target geometries on laser propulsion in water, targets with/without conical cavity and hemispherical cavity are designed in this paper. The momentum I_Tgained by targets and the momentum coupling coefficient C_m are investigated experimentally by high-speed photography method. It shows that the propulsion effects are better if there is a cavity on the laser irradiated surface of the target, and a hemispherical cavity works better than a conical cavity. In addition, I_T increases with the laser energy, but the increasing trend slows gradually, and C_m increases with the laser energy first, and then levels off for all four targets. These results are both due to the laser plasma shielding. In conclusion, we need design suitable target geometries and use optimal laser energy to get the best propulsion effect for controlling microfluid device or micro class satellites.

Citation Download Citation

Jun Chen, Bei-Bei Li, Hong-Chao Zhang, Bing Han, Zhong-Hua Shen, and Xiao-Wu Ni "Propulsion of targets with different confinement geometries in water by Nd: YAG laser at 1064nm", Proc. SPIE 8603, High-Power Laser Materials Processing: Lasers, Beam Delivery, Diagnostics, and Applications II, 86030W (22 February 2013); https://doi.org/10.1117/12.2001493

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