CARS probe of RDX decomposition

Aron, Kenneth P.; Harris, L. E.

doi:10.1016/0009-2614(84)80331-0

Cited by 26 publications

(2 citation statements)

References 10 publications

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“…Significant effort was devoted to improve performances, in particular in terms of spatial resolution and signal-to-noise ratio. Laser-based techniques such as spontaneous Raman spectroscopy [9], coherent anti-Stokes Raman scattering (CARS) [10,11], and laser-induced fluorescence (LIF) [2,9,[12][13][14][15][16] have also been used. The LIF technique was first applied by Edwards et al [12] to investigate the flame of a monopropellant (HMX) and of an AP/HTPB propellant up to 3.5 MPa.…”

Section: Introductionmentioning

confidence: 99%

Detection of iron atoms by emission spectroscopy and laser-induced fluorescence in solid propellant flames

et al. 2018

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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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Section: Introductionmentioning

confidence: 99%

Detection of iron atoms by emission spectroscopy and laser-induced fluorescence in solid propellant flames

et al. 2018

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“…This capability was subsequently extended to the reaction zone of rich CH,-N20 flames and the flames of solids (the nitramine RDX, hexahydro-1,3,5,-trinitr0-3-triazine in an organic ester matrix). [6][7][8] Spectra were obtained in the regions 4200-3900, 2400-2050 and 1900-1200 cm-'. The reaction zone of the rich CH4-N20 flame was studied primarily to provide a stationary flame analogue to the transient propellant flame.…”

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Hydrogen coherent antistokes Raman spectra from CH₄–N₂O and nitramine composite flames

Harris¹

1986

J. Chem. Soc., Faraday Trans. 2

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The H2 spectra from the CH4-N20 and nitramine composite flame allow use of each of the concurrent capabilities of CARS: (i) rovibrational state resolution better than 1 cm-', (ii) time resolution better than 10 ns and (iii) spatial resolution better than 100 pm. The rovibrational state resolution results in direct observation of previously unobserved higher J transitions in the Q branch o"= 0 and o"= 1 and S branch o"= 0 transitions. These transitions are in accord with transitions calculated from ab initio results and with transitions indirectly obtained from electronic emission spectra.The ab initio results give a compact set of constants that give results within the experimental accuracy of the CARS experimental results. The experimental transition energies have been used to construct Boltzmann plots that allow discrimination among the various spectra used to determine temperature. CARS is thus seen to provide the spectral resolution and intensity to allow direct Observation of previously unobserved hydrogen higher J and v rotational transitions. These transitions have been used to obtain temperature profiles in the CH,-N20 and nitramine composite flames which requires both the high spatial and temporal resolution of CARS. These temperature profiles have provided additional confirmation of previous kinetic mechanisms used to explain observations in the nitramine composite flame. These concurrent capabilities of CARS used here demonstrate the high potential of CARS for use as the probe beam in kinetic flash photolysis and direct in situ measurements of combustion flames.

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Coherent Anti-Stokes Raman Spectroscopy (CARS) in Pulverized Coal Flames

Hancock

Boyack

Hedman

1992

Advances in Coal Spectroscopy

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CARS probe of RDX decomposition

Cited by 26 publications

References 10 publications

Detection of iron atoms by emission spectroscopy and laser-induced fluorescence in solid propellant flames

Detection of iron atoms by emission spectroscopy and laser-induced fluorescence in solid propellant flames

Hydrogen coherent antistokes Raman spectra from CH₄–N₂O and nitramine composite flames

Coherent Anti-Stokes Raman Spectroscopy (CARS) in Pulverized Coal Flames

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CARS probe of RDX decomposition

Cited by 26 publications

References 10 publications

Detection of iron atoms by emission spectroscopy and laser-induced fluorescence in solid propellant flames

Detection of iron atoms by emission spectroscopy and laser-induced fluorescence in solid propellant flames

Hydrogen coherent antistokes Raman spectra from CH4–N2O and nitramine composite flames

Coherent Anti-Stokes Raman Spectroscopy (CARS) in Pulverized Coal Flames

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Hydrogen coherent antistokes Raman spectra from CH₄–N₂O and nitramine composite flames