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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
ESCI SJR: 0.176 SNIP: 0.48 CiteScore™: 1.3

ISSN Druckformat: 1093-3611
ISSN Online: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.v2.i1.20
pages 15-24

PERIODIC LIGHT PERTURBATION IN AN ARGON DISCHARGE AT ATMOSPHERIC PRESSURE

F. Richard
GREMI - Universite d'Orleans - BP 6759 - 45067 ORLEANS CEDEX 2
J.-M. Cormier
GREMI-ESPEO, CNRS-Universite d'Orleans, BP 6759, 45067 Orleans Cedex 2, France
Stephane Pellerin
GREMI, CNRS-Universite d'Orleans, BP 6759, 45067 Orleans Cedex 2, France LASEP, Universite d'Orleans - Antenne de Bourges, BP4043, 18028 Bourges, France
V. Dalaine
GREMI - Universite d'Orleans - BP 6759 - 45067 ORLEANS CEDEX 2
J. Chapelle
LASEP, Centre Universitaire de Bourges, Rue Gaston Berger, BP 4043, 18028 Bourges Cedex, France

ABSTRAKT

High speed photography of a low current discharge in argon at atmospheric pressure has been performed using an electronic camera. The exposure time is adjustable between 50 ns and 1 µs. The pictures obtained for various experimental conditions show a peculiar longitudinal distribution of light pearls which is of a great interest for good understanding of transitional arc-discharge behaviour. Measurements of pearls-light velocities have been carried out in relation with the electric field strength. The frequencies of oscillations are given as a function of the current. We show in this paper that such an atmospheric discharge is governed by non equilibrium effects.


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