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Ignition of pyrotechnic mixture by means of a laser diode. Part II: Experimental study
Author(s) -
Roux M.,
Gillard Ph.
Publication year - 1997
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.19970220610
Subject(s) - explosive material , ignition system , materials science , laser ignition , laser , diode , optical fiber , optics , wavelength , laser diode , combustion , fiber , pulse (music) , optoelectronics , chemistry , composite material , physics , thermodynamics , organic chemistry , detector
An experimental device using a laser diode is described. The laser diode is coupled with a 100 μm diameter optical fiber. Lasering times are about one ms and the energy of the pulse ranges from 0.5 mJ to 5 mJ. Output power provided by optical fiber is about 0.5 W and the wavelength of radiation is 820 nm. Before each shot the pulse energy is measured by means of a joule meter. It allows a very accurate determination of the amount of energy transferred to the solid explosive. A small reactor containing about 40 mg of explosive is used. It allows to initiate combustion with a direct contact between the output of an optical fiber and the solid explosive. Three pyrotechnic compounds were tested and tests have shown that it is possible to ignite Zr/KClO 4 and Zr/PbCrO 4 mixtures. Experimental results are discussed and compared with numerical simulations presented in Part I.