Electron Temperature Determination from Non-LTE Populations in a Nitrogen Plasma JET

Catherinot, A.; Sy, A.

doi:10.1515/zna-1975-0906

Cited by 21 publications

(8 citation statements)

References 14 publications

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“…In the present experimental conditions, however, the electron heating is negligible: ATe/Te < 2 x (Desilva and Goldenbaum 1970). (ii) Excitation and ionisation by absorption of one or several photons from highly excited levels (Chapelle et a1 1973), which yield modifications of the atomic excited state populations and compete with usual collisional and radiative processes populating and depopulating atomic levels in the plasma (Drawin 1969(Drawin , 1971, Catherinot and Sy 1975).…”

Section: Lowering Of the Population Of The Atomic Excited Statesmentioning

confidence: 99%

'Two-level', Stokes, and anti-Stokes pumping of a nuclear gamma laser with anisotropic hidden inversion

Rivlin¹

1999

Quantum Electron.

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TEA COz laser induced perturbation of shape and intensity of the first Balmer lines emitted by a hydrogen low-pressure glow discharge is investigated for radiation intensity fL in the 10 MW cm-' range. Because of the AC Stark effect, shifts of levels n, = 4, 5, 6, 7 and 8 are measured (i.e. for f~ = 8 MW cm-', AE5 = -0.59 cm-', AEd = 1.81 cm-l, AE7 = 0.55 cm-I). In addition, splitting and optical satellites originating from high orbital quantum numbers are clearly observed on the Ha line. The laser one-and two-photon ionisation processes almost completely depopulate the excited states n, 2 8.Because of collisional radiative processes the states n, = 4, 5, 6 and 7 which do not undergo photoionisation are also strongly depopulated. From a kinetic model, an approximate calculation of the collisional excitation transfer rate coefficient shows that the infrared laser perturbation method can be a powerful tool for investigating collisional excitation transfers connecting excited state populations in plasmas.

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Section: Lowering Of the Population Of The Atomic Excited Statesmentioning

confidence: 99%

'Two-level', Stokes, and anti-Stokes pumping of a nuclear gamma laser with anisotropic hidden inversion

Rivlin¹

1999

Quantum Electron.

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“…The values of pp used in this work are the same as in Park's work (Park 1975). The variations of pp with 8, are fitted by a parabola: pp = A , 82, + Bpee + C,; the values of the coefficientSA,, B,, C, can be found in Catherinot and Sy (1975). Kpc and K , denote the rate coefficients for the ionisation of level p of the neutral atom and the corresponding three-body recombination.…”

Section: P = Lmentioning

confidence: 99%

Calculation of the total rate coefficients for non-equilibrium nitrogen thermal plasmas at atmospheric pressure

Bacri¹,

Gomes²

1986

J. Phys. D: Appl. Phys.

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The total rate coefficients used in a simplified collisional radiative (SCR) model are calculated for thermal nitrogen plasmas at atmospheric pressure. Most of them cannot be considered as physical quantities depending on only a few parameters such as the electron temperature but are functions of the actual state of the plasma. The variations of these coefficients under the influence of radiative losses, the departure between electron and heavy-particle temperatures and the diffusion processes are studied. The use of these coefficients in a SCR model is discussed.

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“…For atomic nitrogen, 34 fictitious levels are considered, as in Park (1973) or Catherinot and Sy (1975). Each level represents real levels with the same quantum numbers (n, l), except of the three first levels 4S0, 2P and 2D which are treated individually and for the highest excited levels which are coalesced according to the principal quantum number value (7 S n S 20).…”

Section: Description Of the Cr Modelmentioning

confidence: 99%

Departures from CLTE composition in a nitrogen arc at atmospheric pressure. II. Interpretation of departures from CLTE

Bacri

Lagreca

1983

J. Phys. D: Appl. Phys.

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For pt.I see ibid., vol.16, 829-40 (1983). Departures from chemical equilibrium and from Boltzmann's distribution for excited level populations expected with the assumption of CLTE in a nitrogen plasma at atmospheric pressure are explained by means of a collisional-radiative model taking into account both monatomic and diatomic species, in which transport processes are treated by a parametric approach.

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Electron Temperature Determination from Non-LTE Populations in a Nitrogen Plasma JET

Abstract: Atomic nitrogen electronic state populations and electron density have been measured in a high power nitrogen plasma jet in the pressure range 50

Cited by 21 publications

References 14 publications

'Two-level', Stokes, and anti-Stokes pumping of a nuclear gamma laser with anisotropic hidden inversion

'Two-level', Stokes, and anti-Stokes pumping of a nuclear gamma laser with anisotropic hidden inversion

Calculation of the total rate coefficients for non-equilibrium nitrogen thermal plasmas at atmospheric pressure

Departures from CLTE composition in a nitrogen arc at atmospheric pressure. II. Interpretation of departures from CLTE

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