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Time-Resolved Shadowgraphy of Electrical Discharges Triggered by Laser in Air

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2 Author(s)
Sobral, H. ; Centro de Cienc. Aplic. y Desarrollo Tecnol., Univ. Nac. Autonoma de Mexico, Mexico City ; Robledo-Martinez, A.

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.

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Plasma Science, IEEE Transactions on  (Volume:36 ,  Issue: 4 )