Abstract
AbstractExperiments were conducted with the aim of keeping low‐current DC vacuum arcs stable. A permanent columnar magnet was embedded in the anode and a permanent disk‐shaped magnet was arranged behind the anode. As result, the arc plasma is strongly constricted to a column and a light emitting point appeared on the anode surface. Generation of the anode spot was confirmed by detecting anode metal vapor and ions using mass and spectroscopic analyses under low‐current arcs of less than 20 A. Copyright © 2008 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
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