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Anode Phenomena in Triggered Vacuum Gaps

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2 Author(s)
Kamakshaiah, S. ; Department of High Voltage Engineering Indian Institute of Science Bangalore - 560 012, India ; Rau, R.S.N.

Arc voltage - current characteristics and threshold current densities occuring during the formation of anode spots in triggered vacuum gaps are reported. Single pulses of 1.65 ms arcing time, which correspond to switching surge currents, are used in the study with copper and aluminum anodes. The threshold values are 1.75 times the values reported earlier using the longer, 8 mis, arcing time. They are found to depend upon the duration of arcing time as well as upon electrode material, surface conditions, electrode size and contact separation. Lateral inhomogenity in the electrode geometry appears to reduce the threshold value by promoting early formation of anode spots.

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Plasma Science, IEEE Transactions on  (Volume:5 ,  Issue: 1 )