Laser-induced breakdown spectroscopy: Analysis of OH spectra

This article discusses laser-induced laboratory-air plasma measurements and analysis of hydroxyl (OH) ultraviolet spectra. The computations of the OH spectra utilize line strength data that were developed previously and that are now communicated for the first time. The line strengths have been utilized extensively in interpretation of recorded molecular emission spectra and have been well-tested in laser-induced fluorescence applications for the purpose of temperature inferences from recorded data. Moreover, new experiments with Q-switched laser pulses illustrate occurrence of molecular recombination spectra for time delays of the order of several dozen of microseconds after plasma initiation. The OH signals occur due to the natural humidity in laboratory air. Centrifugal stretching of the Franck-Condon factors and r-centroids are included in the process of determining the line strengths that are communicated as a Supplementary File. Laser spectroscopy applications of detailed OH computations include laser-induced plasma and combustion analyses, to name but two applications. This work also includes literature references that address various diagnosis applications.

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Section: Temperature and Density Of Ohmentioning

confidence: 99%

Laser-Plasma Spectroscopy of Hydroxyl with Applications

et al. 2020

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“…Contributions from species other than OH for time delays of the order of 100 µs can be calculated using a general non-equilibrium program in the equilibrium mode, with inputs obtained from chemical equilibrium codes -one finds approx. 5% wavelength-dependent peak-background contributions from species other than OH [98,99]. In view of the shadowgraphs reported in this work (see Figure 1), averages of well-developed fluid physics phenomena were recorded with linear diode arrays, viz.…”

Section: Temperature and Density Of Ohmentioning

confidence: 99%

Laser-Plasma Spectroscopy of Hydroxyl with Applications

Parigger¹,

Helstern²,

Jordan³

et al. 2020

Preprint

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This article discusses laser-induced laboratory-air plasma measurements and analysis of hydroxyl (OH) ultraviolet spectra. New experiments with Q-switched laser pulses illustrate occurrence of molecular recombination spectra for time delays of the order of several dozen of microseconds after plasma initiation. The computation of the emission spectra utilizes line strength data that are communicated as a supplementary file. Applications of detailed OH computations include laser-induced plasma and combustion analyses, to name but two applications.

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Laser-induced breakdown spectroscopy: Analysis of OH spectra

Cited by 2 publications

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Laser-Plasma Spectroscopy of Hydroxyl with Applications

Laser-Plasma Spectroscopy of Hydroxyl with Applications

Laser-Plasma Spectroscopy of Hydroxyl with Applications

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