Higher Time-Resolution LASEM, Part III: Influence of Laser-Induced Plasma Chemistry on the Laser-Induced Shock Waves of Aluminized Explosives
Abstract
In this final installment of our report series on higher time-resolution data from an improved laser-induced air shock from energetic materials (LASEM) setup, we compare the energy release and spectroscopic emission following pulsed laser excitation of trinitrotoluene (TNT) and hexanitrohexaazaisowurtzitane (CL-20) with either 19 or 10 by weight aluminum nanoparticles (nano-Al). The addition of nano-Al significantly reduces the characteristic laser-induced shock velocities (i.e., estimated detonation velocities), the chemical energy behind the shock wave, and the temperature of the surrounding air. However, the plasma temperatures and electron densities calculated using the hydrogen emission lines were higher for the aluminized explosives. Clear differences in the plasma and combustion chemistry were observed for aluminized TNT and CL-20 via ultraviolet, visible, and near-infrared emission spectroscopy, illustrating the effect of oxygen balance on the Al oxidation during different stages of the energy release (<10 s, 10s of s, and 10s of ms).
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 2020
- Accession Number
- AD1108551
Entities
People
- Jennifer L Gottfried
Organizations
- United States Army Combat Capabilities Development Command