Title :
Time-Resolved Shadowgraphy of Electrical Discharges Triggered by Laser in Air
Author :
Sobral, H. ; Robledo-Martinez, A.
Author_Institution :
Centro de Cienc. Aplic. y Desarrollo Tecnol., Univ. Nac. Autonoma de Mexico, Mexico City
Abstract :
Laser-triggered electric discharges were diagnosed using fast time-resolved shadowgraphy. A focused laser beam produced a plasma between two parallel plates connected to a high-voltage supply. This plasma, in turn, triggers the main arc between the plates. It was found that arcing occurs at about 400 after laser firing. The breakdown mechanism responds to a rarefaction of the air between the electrodes rather than to laser ionization.
Keywords :
arcs (electric); electric breakdown; plasma production by laser; air rarefaction; arcing; breakdown mechanism; electrodes; focused laser beam; high-voltage supply; laser-triggered electric discharges; parallel plates; time-resolved shadowgraphy; Chemical lasers; Electric breakdown; Electrodes; Gas lasers; Laser beams; Laser modes; Laser theory; Optical pulses; Optical switches; Plasma simulation; Laser-induced plasmas (LIPs); laser triggering; shadowgraphy;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2008.926851
