2010
DOI: 10.1088/0022-3727/43/12/124002
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Atmospheric pressure plasma diagnostics by OES, CRDS and TALIF

Abstract: Nanosecond repetitively pulsed (NRP) discharges were used to generate atmospheric pressure plasmas in air or nitrogen preheated at 1000 K. In order to understand the physico-chemical mechanisms that control the number densities of active species, in situ optical diagnostic techniques were developed. The ground state of atomic oxygen was measured by two-photon absorption laser induced fluorescence (TALIF), the density of N2(A) was measured by cavity ring down spectroscopy (CRDS) and the densities of N2(B) and N… Show more

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Cited by 208 publications
(179 citation statements)
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“…Then, excited N 2 molecules are quenched by oxygen molecules, producing atomic oxygen radicals and heat release in the afterglow. In previously studies, the two-step process mechanism was verified by the experimental observation of the ultrafast production of O atom [15] and the measured high rotational temperature of N 2 with the assumption that the rotational and translational modes of N 2 are equilibrated at all times [16]. More plenty of transient information about the process and direct evidences to further confirm the ultrafast heating are needed in order to prove or supply the mechanism and to understand the nonequilibrium process of NPD.…”
Section: N X E N a B C E N A B C O N X O O Heat Releasementioning
confidence: 86%
“…Then, excited N 2 molecules are quenched by oxygen molecules, producing atomic oxygen radicals and heat release in the afterglow. In previously studies, the two-step process mechanism was verified by the experimental observation of the ultrafast production of O atom [15] and the measured high rotational temperature of N 2 with the assumption that the rotational and translational modes of N 2 are equilibrated at all times [16]. More plenty of transient information about the process and direct evidences to further confirm the ultrafast heating are needed in order to prove or supply the mechanism and to understand the nonequilibrium process of NPD.…”
Section: N X E N a B C E N A B C O N X O O Heat Releasementioning
confidence: 86%
“…Il est important de noter que la longueur d'absorbance n'est pas nécessairement égale à la distance entre les miroirs d. La méthode ne nécessite pas de connaître les coefficients de réflexion des miroirs. Lors des études en flamme ou dans les plasmas, le milieu réactif est placé au centre de la cavité optique [3,4], comme le montre la figure 2.…”
Section: Principe Général De La Crdsunclassified
“…That is why some authors prefer to use controlled inhomogeneous excitation instead. For example, in papers [Bak et al, 2011;Stancu et al, 2010;Grisch et al, 2009;Wu et al, , 2011 the point-to-point electrodes geometry was used. This geometry generates non-uniform streamer-like discharge but because of its high reproducibility allows to reconstruct the spatial distribution of excitation and kinetics in plasma.…”
Section: Kinetics Of Plasma Assisted Combustion Below Self-ignition Tmentioning
confidence: 99%
“…OH and CH PLIF experiments were performed to confirm the large OH and CH streamer-induced production over the discharge volume. Papers [Bak et al, 2011;Stancu et al, 2010] discuss an important question on the channels of molecular oxygen dissociation in pulsed discharges. In [Bak et al, 2011] time-resolved emission measurements for N 2 (C-B) and N 2 (B-A) transitions were carried out in nanosecond pulsed discharges in air and pure nitrogen.…”
Section: Kinetics Of Plasma Assisted Combustion Below Self-ignition Tmentioning
confidence: 99%
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