Diagnostics of discharge modes of a free-burning low-current argon arc
作者： J Reiche , F Könemann , W Mende , M Kock
DOI: 10.1088/0022-3727/34/21/310
关键词: Atomic physics 、 Temperature measurement 、 Electron density 、 Atmospheric pressure 、 Optics 、 Cathode 、 Electron temperature 、 Argon 、 Chemistry 、 Thomson scattering 、 Rayleigh scattering
摘要: We investigated the cathode region of free-burning argon arcs at atmospheric pressure and currents from 0.3 A up to 25 A. Apart well known diffuse mode operation we also found a more constricted form which call blue-core mode. Different diagnostic methods are simultaneously applied these modes operation, that is: emission spectroscopy in conjunction with partial LTE model for density temperature measurements; Thomson scattering electron determination; Rayleigh determination gas temperature. The large differences appearance, densities, temperatures or current formation between discharge defined by measurements.
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