Highly Temporal Visualization of Generation Process of Underwater Secondary Streamer From Developed Primary Streamer

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 chan...

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Bibliographic Details
Published inIEEE transactions on plasma science Vol. 42; no. 10; pp. 2398 - 2399
Main Authors Fujita, Hidemasa, Kanazawa, Seiji, Ohtani, Kiyonobu, Komiya, Atsuki, Kaneko, Toshiro, Sato, Takehiko
Format Journal Article
LanguageEnglish
Published IEEE 01.10.2014
Subjects
Cameras
Discharge current
Discharges (electric)
Educational institutions
Electrodes
high-speed visualization
Microscopy
primary streamer
secondary streamer
Streaming media
underwater discharge
Visualization
high-speed visualization
primary streamer
Discharge current
secondary streamer
underwater discharge
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Summary: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.
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.2014.2325937