Modeling laser ignition of explosives and pyrotechnics: Effects and characterization of radiative transfer

Conference · Mon Jan 01 04:00:00 EST 1990

OSTI ID:6856767

Skocypec, R D; Mahoney, A R; Glass, M W; Jungst, R G; Evans, N A; Erickson, K L

The ignition of explosives and pyrotechnics using commercial diode lasers has been demonstrated and is of interest as a potential replacement for hot-wire ignition. Initial laser diode ignitor (LDI) test results using the detonation-to-deflagration transition(DDT) explosive CP (2-(5-cyanotetrazolato) pentaamminecobalt (III) perchlorate, C{sub 2}H{sub 15}N{sub 10}Co--Cl{sub 2}O{sub 8}) doped with carbon black and graphite have reinforced the need for a better understanding of the interaction of the radiant energy transfer within the pressed material. The present work is directed toward developing a model to predict the transfer of laser energy in the pressed particulate charges. It is shown here that scattering can have a major effect on the volumetric absorption of laser energy, significantly affecting the thermal response of the granular energetic material. This paper describes an effort to characterize the radiative properties of compacted granular beds of CP and CP doped with carbon black or graphite that were prepared using normal pressing techniques. Current estimates of the radiative properties are presented and indicate dramatic in absorption for CP when even a minute amount of carbon black or graphite is added. Initial data indicate pressed, undoped CP scatters radiative energy significantly. The radiative properties are dependent upon both wavelength and packing density; the less-densely packed samples exhibit more scattering. Doped samples exhibit essentially wavelength-independent characteristics. 14 refs., 7 figs., 1 tab.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6856767
• Report Number(s): SAND-90-0577C; CONF-900792--5; ON: DE90011052
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
450100* -- Military Technology
Weaponry
& National Defense-- Chemical Explosions & Explosives
CHEMICAL EXPLOSIVES
COOLING
DIFFUSION
EXPLOSIVES
IGNITION SYSTEMS
LASERS
MATHEMATICAL MODELS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
PYROTECHNIC DEVICES
RADIATIVE COOLING
REFLECTION
SCATTERING
SOLID STATE LASERS