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Proceedings Paper

An analysis of force generation in TEA CO2 laser ablation of liquids
Author(s): John Sinko; Lisa Kodgis; Simon Porter; Jun Lin; Andrew V. Pakhomov; C. William Larson; Franklin B. Mead
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Paper 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.

Paper Details

Date Published: 7 June 2006
PDF: 12 pages
Proc. SPIE 6261, High-Power Laser Ablation VI, 62611W (7 June 2006); doi: 10.1117/12.674573
Show Author Affiliations
John Sinko, Univ. of Alabama in Huntsville (United States)
Lisa Kodgis, Univ. of Alabama in Huntsville (United States)
Simon Porter, Univ. of Alabama in Huntsville (United States)
Jun Lin, Univ. of Alabama in Huntsville (United States)
Andrew V. Pakhomov, Univ. of Alabama in Huntsville (United States)
C. William Larson, Air Force Research Lab. (United States)
Franklin B. Mead, Air Force Research Lab. (United States)


Published in SPIE Proceedings Vol. 6261:
High-Power Laser Ablation VI
Claude R. Phipps, Editor(s)

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