EXPLOSIVE SENSITIVITY OF PETN-ALUMINUM COMPOSITES TO PULSED LASER RADIATION

Abstract

Dependences of nanosize aluminum inclusions’ absorptivity on their size for the first and second harmonics of YAG-Nd laser were calculated. The values of the minimal critical energy density for the initiation by the first and second harmonics of YAG-Nd laser are 206.7 (λ = 1064 nm) and 152.6 (λ = 532 nm) mJ/cm2 with radii of aluminum inclusions 100 and 49 nm respectively. The values of the minimal critical energy density for the initiation PETN with nanosize aluminum were experimentally measured. The calculated minimal critical energy density for the initiation by the first and second harmonics is different by 1.4 times, which is in good agreement with the experiment, where the difference is 1.6 times.

Keywords

• aluminum nanoparticles
• absorptivity
• simulation
• energy materials