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Experimental studies of microarcs between copper electrodes - Fig. 4

Related to Figure 4 of the paper: Dual imaging with spectral filters for Cu I and O I emission lines at two instants 33 and 34 ms after contact separation for an arc at 2 A – the gap distance is 1.5 mm. The cathode is on the right hand side. The images measure 1.40×1.55 mm, the acquisition time is 1 ms.