TY - JOUR
T1 - High-Speed Laser-Launched Flyer Impacts Studied with Ultrafast Photography and Velocimetry
AU - Banishev, Alexandr A.
AU - Shaw, William L.
AU - Bassett, Will P.
AU - Dlott, Dana D.
N1 - Funding Information:
Acknowledgments The research described in this study was based on work supported by the US Army Research Office under award W911NF-13-1-0217, the US Air Force Office of Scientific Research under awards FA9550-14-1-0142 and FA9550-16-1-0042, the Defense Threat Reduction Agency under award HDTRA1-12-1-0011, and the Office of Naval Research under award N00014-12-1-0828. William L. Shaw and Will P. Bassett acknowledge support from the Stewardship Sciences Academic Alliance Program from the Carnegie-DOE Alliance Center, under DOE award DE-NA0002006.
Publisher Copyright:
© 2016, Society for Experimental Mechanics, Inc.
PY - 2016/6/1
Y1 - 2016/6/1
N2 - 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 to 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. These stroboscopic images can be used to estimate the tilt in the flyer-target impact to be <1mrad.
AB - 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 to 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. These stroboscopic images can be used to estimate the tilt in the flyer-target impact to be <1mrad.
KW - Flyer plate
KW - High-speed impact
KW - Shock generation
KW - Ultrafast microscopy
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U2 - 10.1007/s40870-016-0058-2
DO - 10.1007/s40870-016-0058-2
M3 - Article
AN - SCOPUS:85017107109
SN - 2199-7446
VL - 2
SP - 194
EP - 206
JO - Journal of Dynamic Behavior of Materials
JF - Journal of Dynamic Behavior of Materials
IS - 2
ER -