Pulsed lasers can launch thin metal foils at km s-1, but for precision measurements in shock compression science and shock wave spectroscopy, where one-dimensional shock compression is vital, flyer plate impacts with targets must have a high degree of flatness and minimal tilt, and the flyer speeds and impact times at the target must be highly reproducible. We have developed an apparatus that combines ultrafast stroboscopic optical microscopy with photon Doppler velocimetry to study impacts of laser-launched Al and Cu flyer plates with flat, transparent glass targets. The flyer plates were 0.5 mm in diameter, and ranged from 12-100 μm thick, with flyer speeds up to 6.25 km s-1. The velocity variations over 30-60 launches from the same flyer plate optic can be as low as 0.6%, and the impact time variations can be as low as 0.8 ns. Stroboscopic image streams (reconstructed movies) show uniform, flat impacts with a glass target. As a result, these stroboscopic images can be used to estimate the tilt in the flyer-target impact to be <1mrad.
Banishev, Alexandr A., et al. "High-speed laser-launched flyer impacts studied with ultrafast photography and velocimetry." Journal of Dynamic Behavior of Materials, vol. 2, no. 2, Feb. 2016. https://doi.org/10.1007/s40870-016-0058-2
Banishev, Alexandr A., Shaw, William L., Bassett, Will P., & Dlott, Dana D. (2016). High-speed laser-launched flyer impacts studied with ultrafast photography and velocimetry. Journal of Dynamic Behavior of Materials, 2(2). https://doi.org/10.1007/s40870-016-0058-2
Banishev, Alexandr A., Shaw, William L., Bassett, Will P., et al., "High-speed laser-launched flyer impacts studied with ultrafast photography and velocimetry," Journal of Dynamic Behavior of Materials 2, no. 2 (2016), https://doi.org/10.1007/s40870-016-0058-2
@article{osti_1364628,
author = {Banishev, Alexandr A. and Shaw, William L. and Bassett, Will P. and Dlott, Dana D.},
title = {High-speed laser-launched flyer impacts studied with ultrafast photography and velocimetry},
annote = {Pulsed lasers can launch thin metal foils at km s-1, but for precision measurements in shock compression science and shock wave spectroscopy, where one-dimensional shock compression is vital, flyer plate impacts with targets must have a high degree of flatness and minimal tilt, and the flyer speeds and impact times at the target must be highly reproducible. We have developed an apparatus that combines ultrafast stroboscopic optical microscopy with photon Doppler velocimetry to study impacts of laser-launched Al and Cu flyer plates with flat, transparent glass targets. The flyer plates were 0.5 mm in diameter, and ranged from 12-100 μm thick, with flyer speeds up to 6.25 km s-1. The velocity variations over 30-60 launches from the same flyer plate optic can be as low as 0.6%, and the impact time variations can be as low as 0.8 ns. Stroboscopic image streams (reconstructed movies) show uniform, flat impacts with a glass target. As a result, these stroboscopic images can be used to estimate the tilt in the flyer-target impact to be <1mrad.},
doi = {10.1007/s40870-016-0058-2},
url = {https://www.osti.gov/biblio/1364628},
journal = {Journal of Dynamic Behavior of Materials},
issn = {ISSN 2199-7446},
number = {2},
volume = {2},
place = {United States},
publisher = {Springer},
year = {2016},
month = {02}}
Proceedings of the conference of the American Physical Society topical group on shock compression of condensed matter, AIP Conference Proceedingshttps://doi.org/10.1063/1.50595