CO/sub 2/-laser ignition of DAPP targets

Technical Report · Wed Jul 01 00:00:00 EDT 1981

DOI:https://doi.org/10.2172/6283212· OSTI ID:6283212

Brannon, P J

A pulse derived by shuttering a CO/sub 2/ laser operating in the cw mode has been used to ignite a diallyl phthalate pyrotechnic (DAPP) material. Data from this work along with some data taken earlier, while operating the laser in the pulse mode, are presented. When operating in the cw mode, a pulse is mechanically chopped out of the beam and focussed onto the DAPP material. It was found that the shuttered cw mode of operation gives a more reproducible pulse and a more accurate determination of the incident energy than the pulse mode does. The pulse widths for threshold ignition (50% ignitions) at different power levels have been determined for 254 and 127 mm-focal-length lenses which were used to focus the beam on the target. It was also found that targets could be penetrated without ignition of the DAPP material. A 2.54 mm-thick DAPP target is penetrated by the laser beam if the energy per unit area exceeds 29 +1 J/mm/sup 2/. Based on this study, recommendations are given for improving the present test procedures used for DAPP material.

• Research Organization: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6283212
• Report Number(s): SAND-81-1403; ON: DE81028191
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
CHEMICAL EXPLOSIVES
IGNITION
CARBON DIOXIDE LASERS
DETONATIONS
ENERGY DENSITY
FOCUSING
LASER RADIATION
LASER-RADIATION HEATING
LENSES
PULSE TECHNIQUES
PYROTECHNIC DEVICES
TESTING
THRESHOLD ENERGY
ELECTROMAGNETIC RADIATION
ENERGY
EXPLOSIVES
GAS LASERS
HEATING
LASERS
PLASMA HEATING
RADIATIONS
450100* - Military Technology
Weaponry
& National Defense- Chemical Explosions & Explosives