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Study of Al2O3 Ceramics’ Laser-Triggered Surface Flashover Characteristics with Pulsed Voltage
Author(s): 
Pages: 314-319
Year: Issue:  12
Journal: Transactions of China Electrotechnical Society

Keyword:  Surface flashoverpulsed voltagelaser triggereddelay timejitter timeairvacuum;
Abstract: With the aim of studying the characteristics of laser-triggered surface flashover with pulsed voltage, synchronization problem of laser pulse and voltage pulse is solved through a high precision laser trigger system is built up in test system. Experiment of laser-triggered surface flashover is carried out using the flat electrodes and columned insulators based on the test system. The material of electrode is copper and the material of insulator is Al2O3. Laser pulse’s wavelengths are 532 nm and 1 064 nm, and laser is focused with rectangle. The flashover delay time and jitter time are obtained through experiment, and the results of experiment show that flashover delay time and jitter time decrease with increase of pulsed voltage or laser energy density, the delay time of 1 064 nm laser trigger is larger than that of 532 nm laser trigger, and the delay time and jitter time in vacuum condition are less than the delay time and jitter time in air condition.
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