Open AccessDetection of iron atoms by emission spectroscopy and laser-induced fluorescence in solid propellant flames
Author(s) -
Gautier Vilmart,
Nelly Dorval,
Mikaël Orain,
D. Lambert,
Robin Devillers,
Y. Fabig,
Brigitte AttalTrétout,
Alexandre Bresson
Publication year - 2018
Publication title -
applied optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.668
H-Index - 197
eISSN - 2155-3165
pISSN - 1559-128X
DOI - 10.1364/ao.57.003817
Subject(s) - ammonium perchlorate , propellant , fluorescence , laser induced fluorescence , materials science , combustion , planar laser induced fluorescence , fluorescence spectroscopy , analytical chemistry (journal) , spectroscopy , emission spectrum , laser , spectral line , optics , atomic physics , chemistry , physics , chromatography , astronomy , quantum mechanics , organic chemistry
Planar laser-induced fluorescence on atomic iron is investigated in this paper, and a measurement strategy is proposed to monitor the fluorescence of iron atoms with good sensitivity. A model is proposed to fit the experimental fluorescence spectra, and good agreement is found between simulated and experimental spectra. Emission and laser-induced fluorescence measurements are performed in the flames of ammonium perchlorate composite propellants containing iron-based catalysts. A fluorescence signal from iron atoms after excitation at 248 nm is observed for the first time in propellant flames. Images of the spatial distribution of iron atoms are recorded in the flame in which turbulent structures are generated. Iron fluorescence is detected up to 1.0 MPa, which opens the way to application in propellant combustion.
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