負極性下向きステップトリーダの継続時間と第一帰還雷撃の電流波高値との相関

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2017/08/01

タイトル(英語): Correlations between Durations of Negative Downward Stepped Leaders and Peak Currents of First Return Strokes

著者名: 松井　倫弘（（株）フランクリン・ジャパン），道下　幸志（静岡大学大学院工学研究科）

著者名(英語): Michihiro Matsui (Franklin Japan Corporation), Koji Michishita (Graduate School of Engineering, Shizuoka University)

キーワード: ステップトリーダ，プレリミナリブレイクダウン，帰還雷撃，推定電流波高値，JLDN　　stepped leader，preliminary breakdown，return stroke，estimated peak current，JLDN

要約(英語): The authors have observed E-field waveforms of lightning discharges and estimated duration of negative downward stepped leader by measuring time interval between onsets of preliminary breakdown pulses and the following first return stroke. 334 examples obtained in Sagamihara city on six days of summer in 2015 are subject to an analysis. Mean and median durations of negative downward stepped leader measured by our observations were 29.7 ms and 22.0 ms, respectively. We found out that there were correlations between duration of negative downward stepped leader and peak current of the following first return stroke estimated by the JLDN. The duration of negative downward stepped leader became short when absolute value of estimated peak current of first return stroke became large. The time interval of the leader pulse in the E-field waveform did not depend on the current amplitude of the following first stroke, therefore, the above-mentioned result might be due to the increase of the step length of the leader with the increase of the current amplitude of the following first return stroke.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.137 No.8 （2017） 特集：磁気センサの高機能化と応用技術の新展開

本誌掲載ページ: 489-496 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/137/8/137_489/_article/-char/ja/