4 research outputs found
Laser absorption and energy transfer in foams of various pore structures and chemical compositions
Interaction of sub-nanosecond intense laser pulses with
foams containing fine and large pores has been studied experimentally. Laser
penetration and energy transport in the foam material are measured via
streaked side-on x-ray slit images. Shock wave transition through the foam
is detected via streaked optical self-emission from foil attached on the
foam rear side. The shock transition time increases with the pore size, foam
density, and also with the contents of high Z additions in plastic foams.
Foil acceleration is observed via 3-frame interferometry. Comparison of
experimental results with numerical simulations and an analytical model is
underway