An analysis of force generation in TEA CO<sub>2</sub> laser ablation of liquids

John Sinko; Lisa Kodgis; Simon Porter; Jun Lin; Andrew V. Pakhomov; C. William Larson; Franklin B. Mead Jr.

doi:10.1117/12.674573

7 June 2006 An analysis of force generation in TEA CO₂ laser ablation of liquids

John Sinko, Lisa Kodgis, Simon Porter, Jun Lin, Andrew V. Pakhomov, C. William Larson, Franklin B. Mead Jr.

Proceedings Volume 6261, High-Power Laser Ablation VI; 62611W (2006) https://doi.org/10.1117/12.674573
Event: High-Power Laser Ablation 2006, 2006, Taos, NM, United States

Abstract

A combination of techniques including launch ballistics, force sensing, and time-resolved ICCD imaging was applied to the study of the mechanisms of liquid ablation in the irradiance regimes from 10⁶-10⁸ W/cm². A TEA CO₂ laser (λ = 10.6 μm), 300 ns pulse width and 9 J pulse energy, was used for ablation of liquids contained in various quartz glass containers in order to examine dependencies on surface tension, absorption depth, etc. Dominant mechanisms of force generation were analyzed in order to determine their characteristics, and the evolution of the liquid surface was studied in depth. Net imparted impulse and coupling coefficient were derived from the force sensor data and ballistics experiments, and relevant results will be presented for various container designs and liquids used. The key differences between surface and volume absorbing liquids was observed. Various mechanisms including plasma formation, vaporization, bulk liquid flow, etc. will be critically examined and their relevance to force generation and propulsion will be determined.

Citation Download Citation

John Sinko, Lisa Kodgis, Simon Porter, Jun Lin, Andrew V. Pakhomov, C. William Larson, and Franklin B. Mead Jr. "An analysis of force generation in TEA CO₂ laser ablation of liquids", Proc. SPIE 6261, High-Power Laser Ablation VI, 62611W (7 June 2006); https://doi.org/10.1117/12.674573

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