Temperature and Metal-Vapor Near Contacts in Pd Breaking Arcs by Spectroscopic Measurement

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In this study the spectral intensities of a breaking arc were measured near the cathode and the anode between separating Pd contacts in a DC 50V/5A circuit, and arc temperature and metal-vapor quantity and density were calculated. Results show the radial distribution of temperature in the cross section of an arc column was constant both near the cathode and the anode from the beginning to the extinction of the breaking arc. Near the cathode the arc temperature in the position of the peak value of spectral intensity rose to about 6000K at the beginning and remained constant, but near the anode it rose to about 6000K at the beginning and then decreased towards the extinction of the arc. Both near the cathode and the anode metal-vapor quantity and density rose suddenly at the beginning. Afterwards, they fell near the cathode until extinction. But they became constant approaching extinction near the anode. And the metal-vapor quantity was greater and the density higher near the cathode than near the anode.
社団法人電子情報通信学会の論文
1998-07-25