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11 January 2000 Ablation effect on an impulse discharge induced by a laser-plasma channel
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Proceedings Volume 3886, High-Power Lasers in Energy Engineering; (2000)
Event: Advanced High-Power Lasers and Applications, 1999, Osaka, Japan
In order to develop a technique to induce a negative impulse discharge by a laser-ionized channel in a rod-to-rod electrode configuration, the ablation effect on the induction has been examined. Single irradiation by a high- power CO2 laser on the surface of the copper high- voltage electrode produced a luminous plasma plume. This ablation plasma was used for a discharge induction by an ionization channel created by a XeCl laser. It was found that the ablation enhances the trigger and guide effect for induction of a long gap discharge. The guide length was elongated approximately twice. The ablation plasma bead reduced the 50 percent sparkover voltage and the sparkover time. Electrical discharge leaders were observed by a flaming image converter camera. The ablation plasma bead made an early start of the leader from the high-voltage electrode and accelerated the leader advancement.
© (2000) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Michihiro Uchiumi, Kiyotaka Ueda, Katsunori Muraoka, Fumihiro Kinoshita, Masanori Akazaki, Toshikatsu Tanaka, and Chikahisa Honda "Ablation effect on an impulse discharge induced by a laser-plasma channel", Proc. SPIE 3886, High-Power Lasers in Energy Engineering, (11 January 2000);

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