Laser-guided discharges in long gaps

Author

Shindo, Takatoshi ; Miki, Megumu ; Aihara, Y. ; Wada, Atsushi

Author_Institution

Central Res. Inst. of Electr. Power Ind., Tokyo, Japan

Volume

8

Issue

4

fYear

1993

fDate

10/1/1993 12:00:00 AM

Firstpage

2016

Lastpage

2022

Abstract

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

Keywords

electric breakdown of gases; flashover; gas lasers; laser beam applications; lightning protection; power system protection; 10 m; 4.5 m; CO₂; air breakdown plasmas; flashover voltage characteristics; fog; guiding characteristics; laser-guided discharge; long gaps; mirror; plasma channel; power system protection; precipitation; rain; Density measurement; Electric breakdown; Flashover; Laser theory; Lightning; Plasma properties; Pollution measurement; Power lasers; Power transmission; Rain;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.248316

Filename

248316