sparkovern.
= flash-over n.
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flash-over1892
sparkover1915
1915 Standardization Rules Amer. Inst. Electr. Engineers 48 The Spark-over voltage, for a given gap, decreases with decreasing barometric pressure and increasing temperature.
1936 Nature 19 Sept. 509/1 The crackling sound of more or less prolonged duration finishes with a loud crack coincident with the final sparkover.
1942 J. D. Stranathan ‘Particles’ of Mod. Physics xi. 431 The accelerating tube, including a source of ions at one end and the target to be bombarded at the other, must have sufficient length to prevent spark-over along the outside of the tube.
1946 Nature 2 Nov. 603/2 The sparkover voltage of different electrode arrangements in air.
This entry has not yet been fully updated (first published 1986; most recently modified version published online December 2020).
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n.1915