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Laser-guided discharges in long gaps

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4 Author(s)
Shindo, T. ; Central Res. Inst. of Electr. Power Ind., Tokyo, Japan ; Miki, M. ; Aihara, Y. ; Wada, A.

Experiments to guide electric discharges with a chain of air breakdown plasmas (plasma channel) produced by a laser were carried out for use in power system protection applications. Electric discharges were guided up to 4.5m with a high power CO2 laser focused by a 10m focal length mirror. Unusual 50% flashover voltage characteristics were obtained and the mechanism on the laser-guided discharge is shown. Experiments of laser-guided discharge in fog or rain were also carried out to clarify the effects of precipitation on the guiding characteristics, and the results are analysed quantitatively

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Power Delivery, IEEE Transactions on  (Volume:8 ,  Issue: 4 )