Photoelectronic techniques for subnanosecond evaluation of laser-material interactions and dynamic material properties

Dennis L. Paisley

doi:10.1117/12.142074

1 April 1993 Photoelectronic techniques for subnanosecond evaluation of laser-material interactions and dynamic material properties

Dennis L. Paisley

Author Affiliations +

Proceedings Volume 1982, Photoelectronic Detection and Imaging: Technology and Applications '93; (1993) https://doi.org/10.1117/12.142074
Event: Photoelectronic Detection and Imaging: Technology and Applications '93, 1993, Beijing, China

Abstract

Photoelectronic techniques provide the highest temporal resolution for dynamic material interaction studies. Optical signals from a velocity interferometer (VISAR) are coupled by fiber optics to the slit plane of an electronic streak camera. Temporal resolution of < 100 ps has been realized. Laser-launched miniature flat plates as thin as 1 micrometers have been launched to 4 km/s resulting in an impact pulse duration of approximately 0.3 ns at > 30 GPa. Miniature plates are being used to study grain and sub-grain size effects of metals and ceramics. The small size of the experiment permits evaluation of: (1) spall strength at strain rates > 10⁷, (2) local grain size effects, (3) grain boundaries, (4) shock and release all within one grain thickness, (5) small samples of valuable or toxic materials, (6) bond strengths between similar or different materials, (7) Hugoniot elastic limits, and (8) separation of elastic-plastic shock velocities. Dynamic properties of metals at grain and sub-grain size affects are just now being investigated experimentally. This presentation discuses the status of work in progress and the application of photoelectronic techniques for data collection and analysis.

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Dennis L. Paisley "Photoelectronic techniques for subnanosecond evaluation of laser-material interactions and dynamic material properties", Proc. SPIE 1982, Photoelectronic Detection and Imaging: Technology and Applications '93, (1 April 1993); https://doi.org/10.1117/12.142074

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