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Proceedings Paper

Acceleration history in laser-ablative impulse measured using velocity interferometer (VISAR)
Author(s): Koichi Mori; Kohei Anju; Akihiro Sasoh; Eugene Zaretsky
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Paper Abstract

The aim of the present study is to clarify the time-dependent characteristics of the impulsive force generated by irradiating a laser pulse onto metallic and polymer materials. A Velocity Interferometer System for Any Reflector (VISAR) is employed to measure the acceleration driven by the laser ablation. The VISAR has two delay-lines that enable the velocity measurement in the range from 10 m/s to 100 m/s. The ablation impulse is inferred from the measured acceleration history. The influence of the ambient air on the ablation pressure is investigated for aluminum using a Nd:YAG laser (wavelength: 1064 nm, pulse energy < 1 J, pulse duration ~ 10 ns) and for a polymer material using a CO2 laser (wavelength: 1.06 μm, pulse energy < 10 J, pulse duration ~ 2 μs). The results of the preliminary experiments revealed the promising potential of the VISAR measurement.

Paper Details

Date Published: 7 June 2006
PDF: 8 pages
Proc. SPIE 6261, High-Power Laser Ablation VI, 626125 (7 June 2006); doi: 10.1117/12.669426
Show Author Affiliations
Koichi Mori, Nagoya Univ. (Japan)
Kohei Anju, Tohoku Univ. (Japan)
Akihiro Sasoh, Nagoya Univ. (Japan)
Eugene Zaretsky, Ben-Gurion Univ. of the Negev (Israel)


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

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