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Proceedings Paper

Ablation effect on an impulse discharge induced by a laser-plasma channel
Author(s): Michihiro Uchiumi; Kiyotaka Ueda; Katsunori Muraoka; Fumihiro Kinoshita; Masanori Akazaki; Toshikatsu Tanaka; Chikahisa Honda
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Paper Abstract

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.

Paper Details

Date Published: 11 January 2000
PDF: 8 pages
Proc. SPIE 3886, High-Power Lasers in Energy Engineering, (11 January 2000); doi: 10.1117/12.375107
Show Author Affiliations
Michihiro Uchiumi, Kyushu Univ. (Japan)
Kiyotaka Ueda, Kyushu Univ. (Japan)
Katsunori Muraoka, Kyushu Univ. (Japan)
Fumihiro Kinoshita, Kyushu Electric Power Co., Inc. (Japan)
Masanori Akazaki, Kyushu Electric Power Co., Inc. (Japan)
Toshikatsu Tanaka, Central Research Institute of Electric Power Industry (Japan)
Chikahisa Honda, Miyazaki Univ. (Japan)

Published in SPIE Proceedings Vol. 3886:
High-Power Lasers in Energy Engineering
Kunioki Mima; Gerald L. Kulcinski; William J. Hogan, Editor(s)

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