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An alternating magnetic field is applied to a transferred arc to create a plasma arc for heating a large metal surface. The arc root oscillates on the metal surface at the frequency of alternating electromagnetic force (I×B force). The magnitude of the applied magnetic field controls the amplitude of the oscillatory motion. By changing the waveform of the applied field, the distribution of the heat...
The cleaning action of the cathode spots was investigated under the various conditions of pressure. Experimental observation revealed that the removal rate of oxide on the surface decreased with the increase of the pressure. On the other hand, surface roughness increased with the increase of the pressure. A simplified model for the removal of oxide and roughening of the surface was developed. The...
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