Contamination d'un plasma d'argon par des vapeurs anodiques de cuivre

Andanson, P; Cheminat, Bernard

doi:10.1051/rphysap:01979001408077500

Cited by 19 publications

(10 citation statements)

References 7 publications

(7 reference statements)

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“…La caracterisation point par point du plasma nkcessite un regime relativement stable de vaporisation de l'electrode (plusieurs minutes). C'est unprobleme experimental delicat, Un tel regime a pu etre obtenu dans une chambre 2 arc particuliere (Andanson et Cheminat 1979). Le diametre du canal de decharge est de 6 mm.…”

Section: Conditions Experimentales Et Mesuresunclassified

“…L'analyse spectromktrique permet de determiner l'evolution spatiale de la temperature Arc tlectrique contamint par du cuivre 2185 et de la teneur en cuivre (Andanson et Cheminat 1979). Cette dernikre grandeur est dCfinie comme le rapport du nombre d'atomes de cuivre 21 celui du nombre d'atomes d'argon (neutres et ionises).…”

Section: La Tempgrature Et La Teneur En Cuivreunclassified

“…L'analyse spectrometrique permet de determiner l'evolution spatiale de la densite electronique (Andanson et Cheminat 1979) mais l'influence du cuivre apparait de mani&re beaucoup plus nette sur les courbes representant la variation de la densite klectronique en fonction de la temperature pour differentes valeurs de la teneur en cuivre (figure 4). Ces resultats sont obtenus lors du calcul de la composition d'kquilibre du plasma necessaire B l'etude spectromitrique.…”

Section: La Densitt Tlectroniqueunclassified

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Conduction in an electric arc column contaminated by copper vapour

Cheminat¹,

Andanson²

1985

J. Phys. D: Appl. Phys.

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Section: Conditions Experimentales Et Mesuresunclassified

Section: La Tempgrature Et La Teneur En Cuivreunclassified

Section: La Densitt Tlectroniqueunclassified

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Conduction in an electric arc column contaminated by copper vapour

Cheminat¹,

Andanson²

1985

J. Phys. D: Appl. Phys.

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“…Most of the available information on it has been generated by theoretical calculation of Shayler, and Fang [1], Abdelhakim et al [2], Ouajji et al [3]. Some experiments have been designed to measure it by many workers Jaya Ram [4], Airey et al [5], Devoto [6], Andanson and Cheminat [7].…”

Section: Introductionmentioning

confidence: 99%

Influence of Silver Vapours on the Transport of Nitrogen Plasma Properties

Amry¹,

El-Raheem²,

Yahya³

2015

JMP

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Theoretical investigation of nitrogen-silver arc transport properties and an arc plasma model in stationary state have studied at low temperature i.e. between 3500 K and 13,000 K at atmospheric pressure. Results showed that the presence of small amounts of metal vapours, which have low ionization potential such as silver, modify the plasma characteristics. The solution of Elenbaas-Heller gives us some information about the effect of metal vapours emitted from electrode on the characteristics of the arc column. We concluded that a small fraction of metal vapours in the arc column modify the electric field, current and the axial temperature.

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“…The decrease in the fraction of silver on the periphery might be explained both from purely geometric considerations (assuming emission of metal vapor from a point source according to a cosine law) and by separation of the components of a plasma of complex composition as a result of ambipolar diffusion (demixing) [13,14].…”

mentioning

confidence: 99%

Parameters of free-burning arc discharge plasma in air with silver-based electrodes

et al. 2006

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We have used optical spectroscopy to study the radial temperature profiles for an electric arc plasma between silver electrodes and electrodes made from composite materials based on silver (Ag-CdO). We studied the structural changes in the working layers of the electrodes by metallography. We established that the parameters of the arc discharge plasma are determined by the condition of the electrode surface.Introduction. Wide application of composite materials in devices for the electrical engineering industry has stimulated interest in studying an arc discharge plasma burning between electrodes made of such materials. Optimization of various technological devices is impossible without knowing the parameters of the plasma for such a discharge.The electrical and thermophysical properties of silver and composites based on silver explain why they are so popular, in particular Ag-CdO composite materials with oxide content of 5-20 mass % are often used in electrical contacts for low-voltage switching devices.In this work, we have used emission spectroscopy methods to study the radial temperature distribution in an electric arc free-burning in air between electrodes made from silver or silver-based composite materials. Since a freeburning arc occurs when breaking the contacts in switching devices, we believe that the studied discharges can be a model for such arcs.The experiment. The arc was initiated in air between the flat end surfaces of uncooled, cylindrically shaped electrodes. The electrode diameter was 6 mm; the interelectrode gap was 6 mm, the discharge current was 3.5 A.Due to the spatial and temporal instability of the discharge, we used the method of one-pass tomographic recording of the spatial distribution of spectral line intensities [1]. Fast scanning of the spatial distributions of the radiation intensities was performed using a (B/W) Sony ILX526A (Japan) 3000 pixel CCD linear array. In combination with a spectral instrument, this allowed us to record the radial radiation distribution in the central cross section of the discharge of a nonsteady-state arc. The operation of the CCD linear array was controlled and synchronized with the discharge power supply using a personal computer (PC). An ISA interface was used to connect to the PC. In order to work with the Windows 9.x./NT/XP family of operating systems, we developed a software interface capable of collection, approximation, and statistical treatment of data, Abelian transformation, and calculation of the plasma temperature. The recording procedure is described in detail in [2]. Due to the instability of the discharge, we carried out statistical averaging of the recorded spatial distributions of the radiation characteristics. We also took into account the nonuniformity of the spectral sensitivity of the apparatus.In order to carry out the spectroscopic procedures for plasma diagnostics in electric arc discharges between composite silver-based electrodes, we need reliable information about the spectroscopic constants of the spectral lines for silver an...

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Contamination d'un plasma d'argon par des vapeurs anodiques de cuivre

Cited by 19 publications

References 7 publications

Conduction in an electric arc column contaminated by copper vapour

Conduction in an electric arc column contaminated by copper vapour

Influence of Silver Vapours on the Transport of Nitrogen Plasma Properties

Parameters of free-burning arc discharge plasma in air with silver-based electrodes

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