Vibrational relaxation in gases and molecular lasers

Gordiet︠s︡, B. F.; Осипов, А. И.; Stupochenko, E. V.; Shelepin, L. A.

doi:10.3367/ufnr.0108.197212c.0655

Cited by 89 publications

(30 citation statements)

References 10 publications

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“…It is quite obvious that the theoretical analysis of IR bands of minor molecular constituents is closely interconnected with the calculation of their concentrations. For instance, Gordiets et al (27,28) and Gordiets (36) showed that in strong parallel electric fields, where Ell = 10-4-103 V/m, electrons can excite the vibrational levels of N2 in collisions with N2, and the reaction may become an important source of NO and N. Vlasov er al. (37) showed that a similar effect arises from the development of the plasma-beam instability during injection of an intensive, monoenergetic electron beam into the thermosphere.…”

Section: History Of the Problemmentioning

confidence: 97%

“…Such a model for disturbed polar regions was suggested by Bishop et al (25) and for both disturbed and quiet conditions by Gordiets (26), Gordiets et ul. (27,28,29), and Gordiets and Markov (30). The use in our model of recently determined rate constants and the inclusion of more than a hundred processes of vibrational excitation and deexcitation, as well as production and loss of molecules radiating in the intermediate the aurora.…”

Section: History Of the Problemmentioning

confidence: 97%

“…At heights of 90-120 km, about (1-2.5)% of the vibrational energy of N2 is transformed into IR radiation of CO. This value accounts for approximately (0.15-0.4)% of the total energy flux of precipitating electrons (27)(28)(29)(30).…”

Section: 7-pm Emission Of Comentioning

confidence: 99%

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Excitation of vibrational emission bands in aurora and airglow

Gordiet︠s︡¹

1986

Can. J. Phys.

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The major results of the theoretical study of infrared radiation in the vibrational-rotational bands of minor molecular constituents in the terrestrial thermosphere are reviewed. Various mechanisms of vibrational excitation of radiating molecules are discussed for both quiet and disturbed conditions (e.g., aurorally enhanced electric fields, etc.). Intensities of infrared emissions and correlations between some of them and emissions in other spectral regions are analyzed, as well as the role that infrared radiation plays in the thermospheric energetics.On revoit les principaux rtsultats de I'Ctude theorique du rayonnement infrarouge dans les bandes de vibration-rotation des constituants molCculaires mineurs dans la thermosphkre terrestre. On discute differents mecanismes d'excitation vibrationnelle des molCcules rayonnantes, dans des conditions paisibles ou perturbees (champs Clectriques intensifies par I'aurore, par exemple, etc ...). Les intensites des Cmissions infrarouges, ainsi que les corrClations entre certaines d'entre elks et les Cmissions dans d'autres regions spectrales sont analysCes, de m&me que le r61e jouC par le rayonnement infrarouge dans I'CnergCtique thermospherique.[Traduit par la revue]Can. J. Phys. 64. 1673 (1986)

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Section: History Of the Problemmentioning

confidence: 97%

Section: History Of the Problemmentioning

confidence: 97%

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Excitation of vibrational emission bands in aurora and airglow

Gordiet︠s︡¹

1986

Can. J. Phys.

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“…The first papers on CO 2 plasma chemistry modeling were published back in 1987-1995 but were applied to CO 2 lasers [22][23][24]. Some papers also studied the vibrational kinetics of CO 2 for gas flow applications [25,26]. Rusanov et al [27] were the first to develop a model for CO 2 conversion in a MW plasma, based on particle and energy conservation equations for the neutral species, and an analytical description of the vibrational distribution function.…”

Section: Literature Overview On Modeling For Plasma-based Co 2 Convermentioning

confidence: 99%

Modeling for a Better Understanding of Plasma-Based CO2 Conversion

Bogaerts¹,

Snoeckx²,

Trenchev³

et al. 2018

Plasma Chemistry and Gas Conversion

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This chapter discusses modeling efforts for plasma-based CO 2 conversion, which are needed to obtain better insight in the underlying mechanisms, in order to improve this application. We will discuss two types of (complementary) modeling efforts that are most relevant, that is, (i) modeling of the detailed plasma chemistry by zero-dimensional (0D) chemical kinetic models and (ii) modeling of reactor design, by 2D or 3D fluid dynamics models. By showing some characteristic calculation results of both models, for CO 2 splitting and in combination with a H-source, and for packed bed DBD and gliding arc plasma, we can illustrate the type of information they can provide.

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“…1. In so doing, the time of relaxation of upper levels is preassigned according to Gordiets et al [19] in the form It follows from the foregoing results that, in the case of nonequilibrium media, the parametric amplification threshold associated with the phase and group detuning of interacting waves disappears at Δk; v 12 → → 0 as is distinct from the case of equilibrium media, in which the threshold of parametric build-up of acoustic wave [10] depends on viscous and thermalconductivity dissipation and cannot be eliminated in principle.…”

Section: Parametric Amplification Of Sound In Nonequilibrium Mediamentioning

confidence: 99%

Resonant interaction of acoustic waves in nonequilibrium gases

Zavershinskii

Kogan

2006

High Temp

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Nonlinear equations are derived, which describe the evolution of two-dimensional acoustic disturbances in a thermodynamically nonequilibrium gas. The characteristic features of parametric interaction of wave packets in acoustically active media are analyzed. The transmission band under conditions of critical and noncritical matching and the threshold of parametric amplification are determined. Conditions are obtained, under which a giant parametric pulse may form in an acoustically active medium, with the amplitude of this pulse exceeding that of a pumping wave.

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Vibrational relaxation in gases and molecular lasers

Cited by 89 publications

References 10 publications

Excitation of vibrational emission bands in aurora and airglow

Excitation of vibrational emission bands in aurora and airglow

Modeling for a Better Understanding of Plasma-Based CO2 Conversion

Resonant interaction of acoustic waves in nonequilibrium gases

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