Electrical Discharge Induced by Ultra-Short High-Power Laser<br>-Triggering and Guiding Effect-

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  • Goto Naohiko
    Electric Power Engineering Research Laboratory, Central Research Institute of Electric Power Industry
  • Miki Megumu
    Electric Power Engineering Research Laboratory, Central Research Institute of Electric Power Industry
  • Fujii Takashi
    Electric Power Engineering Research Laboratory, Central Research Institute of Electric Power Industry
  • Nayuki Takuya
    Electric Power Engineering Research Laboratory, Central Research Institute of Electric Power Industry
  • Sekiya Tomohiko
    Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology
  • Shindo Takatoshi
    Electric Power Engineering Research Laboratory, Central Research Institute of Electric Power Industry
  • Nemoto Koshichi
    Electric Power Engineering Research Laboratory, Central Research Institute of Electric Power Industry Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology

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Other Title
  • 超短パルス高強度レーザを用いた放電誘導<br>—トリガ効果とガイド効果—
  • 超短パルス高強度レーザを用いた放電誘導--トリガ効果とガイド効果
  • チョウタンパルス コウキョウド レーザ オ モチイタ ホウデン ユウドウ トリガ コウカ ト ガイド コウカ

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Description

Triggering and guiding of electrical discharge using an ultra-short, high-power laser is demonstrated. Laser-induced breakdown is observed at a gap length of 2m and a voltage of -1.12MV. Breakdown voltages at a gap length of 1m are reduced by 23% and 5% of the natural breakdown voltage at negative and positive polarity, respectively. Maximum triggering effect is observed for laser pulses at 2μs after the rise of the applied high voltage pulse. Multiple filamentation is expected to allow long distance guiding effect using long distance propagation of multiple filaments.

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