No. 1 | Founded in 1994 | Moscow 2009 |
Laser acceleration of thin foils for receiving experimental data about ultimate strength of matter
V. I. Vovchenko, I. K. Krasyuk, P. P. Pashinin, A. Yu. Semenov
A. M. Prokhorov General Physics Institute of RAS, Moscow, Russia
Laser-driven thin foils were used for investigation spallation phenomena in case of high value of strain rates. In
experiments the aluminium foils with thickness 8 and 15 mkm were used as impactors. The foil mass and velocity
after laser ablation and acceleration were determined by the method of their deceleration in a gas atmosphere.
A 210-mm-aluminium foil was used as a target. As a result of a series of experiments,
we found that in case of
strain rate varying from 3.6·107 to 8·107 1/s the ultimate spall strength of
aluminium target was equal to 90.4 kbar. This value is in accordance with theoretical estimation.
PACS: 52.38.-r