Acceleration history in laser-ablative impulse measured using velocity interferometer (VISAR)

Koichi Mori; Kohei Anju; Akihiro Sasoh; Eugene Zaretsky

doi:10.1117/12.669426

7 June 2006 Acceleration history in laser-ablative impulse measured using velocity interferometer (VISAR)

Koichi Mori, Kohei Anju, Akihiro Sasoh, Eugene Zaretsky

Proceedings Volume 6261, High-Power Laser Ablation VI; 626125 (2006) https://doi.org/10.1117/12.669426
Event: High-Power Laser Ablation 2006, 2006, Taos, NM, United States

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.

Citation Download Citation

Koichi Mori, Kohei Anju, Akihiro Sasoh, and Eugene Zaretsky "Acceleration history in laser-ablative impulse measured using velocity interferometer (VISAR)", Proc. SPIE 6261, High-Power Laser Ablation VI, 626125 (7 June 2006); https://doi.org/10.1117/12.669426

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