著者

島田 義則 内田 成明 安田 裕彦 本越 伸二 石窪 雄二 河崎 善一郎 山中 龍彦 足立 幹雄 山中 千代衛

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌A(基礎・材料・共通部門誌) (ISSN:03854205)

巻号頁・発行日

vol.119, no.7, pp.990-996, 1999-07-01 (Released:2008-07-15)

参考文献数

19

被引用文献数

2 2

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Study of laser triggered lightning has been conducted at field experiments. The experimental site was constructed at Mt. Dake close to the Japan sea shore in Fukui prefecture. An electron-beam sustained two-beam 1kJ CO2 laser, 500 and 1000-mm diameter Cassegrain type focusing mirrors and a 50-m tall lightning tower were prepared. To produce a plasma channel for leader initiation, a plastic target was set at the top of the lightning tower and irradiated by the CO2 laser. An aerosol plasma channel was also produced from the top of the plastic target. The laser plasma channel successfully triggered a lightning stroke. Rogowski coil current detectors monitored the current growing rapidly and UHF interferometer set on Goichi observation site was detected an UHF radiation from Mt. Dake as same timing as the laser irradiating. The UHF radiation was correlated to the leader initiation both in time and space. Hence, we confirmed the laser triggered lightning.