Highly temporal visualization of generation process of underwater secondary streamer from developed primary streamer

Hidemasa Fujita, Seiji Kanazawa, Kiyonobu Ohtani, Atsuki Komiya, Toshiro Kaneko, Takehiko Sato

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

A series of images of a generation process of an underwater secondary streamer from a developed primary streamer was visualized by an ultrahigh-speed camera with a microscope lens. The secondary streamer with a filamentary structure propagated with an average velocity of 30 km/s from one of the channel tips of the semispherical primary streamer with an average propagation velocity of 1.8 km/s. The synchronized current waveform showed that pulsed currents of about 100 mA were changed into a continuous current of about 300 mA when the secondary streamer started to propagate. This experiment was carried out by the application of a single-shot pulsed positive voltage to a needle-to-wire electrode system with a gap length of 6 mm.

Original languageEnglish
Article number6824218
Pages (from-to)2398-2399
Number of pages2
JournalIEEE Transactions on Plasma Science
Volume42
Issue number10
DOIs
Publication statusPublished - 2014 Oct 1

Keywords

  • Discharge current
  • high-speed visualization
  • primary streamer
  • secondary streamer
  • underwater discharge

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

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