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The possibility of laser-induced lightning has been investigated for the future application of protecting electric power systems from lightning strokes. This technique induces lightning strokes artificially along a laser-produced breakdown plasma channel and conducts them to a harmless place on the ground.To clarify the plasma formation mechanism and the discharge (sparkover) induction process, we have performed sparkover induction experiments for two types of long-gap electrode configurations, plate-to-rod and plate-to-plate, with a 50-J TEA CO2 laser. In the present paper, the sparkover voltage characteristics and interferometric measurement on laser-produced plasma are mainly described, together with sparkover induction for a series of metal beads arranged equidistantly which simulate a plasma channel.
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Honda et al. (1993) studied this question.
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